Zika and Climate

Aedes Aegypti in Dar es Salaam, Tanzania, author Muhammad Mahdi Karim, source Wikimedia

Aedes Aegypti in Dar es Salaam, Tanzania, author Muhammad Mahdi Karim, source Wikimedia

Guest essay by Eric Worrall

The Australian Journal of Pharmacy has just tried to link climate change, to the terrifying Zika Virus outbreak in South and Central America. The Zika Virus, a mosquito born disease, has been implicated in an upsurge of serious birth defects.


The news of an outbreak of the Zika virus in South America is a grim reminder of the health hazards associated with a warming world, Climate and Health Alliance Executive Director Fiona Armstrong said today.

A study published in the journal Emerging Infectious Diseases this week documents the spread of the virus in Columbia, while Brazil is experiencing the largest known outbreak of Zika virus, which is being linked to the deaths of babies affected by microencephaly, or abnormally small brains.

“Regions with increasing average temperatures are at increased risk of mosquito-borne diseases, as mosquitoes thrive in and move to warmer regions,” says Armstrong.

Read more: https://ajp.com.au/news/climate-change-could-worsen-diseases-like-zika-virus/

The abstract of the referenced study;

Zika virus (ZIKV) is an arthropodborne member of the genus Flavivirus of the Spondweni serocomplex and is transmitted by Aedes mosquitoes (primarily Ae. aegypti in urban and periurban cycles). ZIKV emerged in Africa and has caused outbreaks of febrile disease that clinically resemble dengue fever and other arboviral diseases (1) but has been linked to neurologic syndromes and congenital malformation (2). Outbreaks have been reported in the Yap islands of the Federated States of Micronesia (3), French Polynesia (4), and Oceania; Brazil is currently experiencing the first reported local transmission of ZIKV in the Americas (5).

The future spread of ZIKV is unpredictable, but the history of ZIKV has been reminiscent of chikungunya virus (CHIKV), which reemerged in Africa and now circulates on all inhabited continents and is a major global health problem. ZIKV has been found in Colombia and is likely following the path of CHIKV, which reached the country in August 2014 (6). The virus co-circulates with other Ae. aegypti–transmitted arboviruses, including dengue virus (DENV) and yellow fever virus. We report ZIKV infection in Colombia and a recent ongoing outbreak in Sincelejo, Colombia, with resulting illness characterized by maculopapular rash, fever, myalgia/arthralgia, and conjunctivitis.

During October–November 2015, a total of 22 patients received a presumptive diagnosis of an acute viral illness by emergency department physicians at the Centro de Diagnostico Medico-Universidad de Sucre in Sincelejo. The patients began treatment for a dengue-like illness, and blood samples were obtained for diagnosis. The samples were analyzed at the Universidad de Sucre by using reverse transcription PCR (RT-PCR) to detect DENV, CHIKV, or ZIKV. Viral RNA was extracted from the serum samples by using the ZR Viral RNA Kit (Zymo Research, Irvine, CA, USA); reverse transcription was performed by using the Protoscript First Strand cDNA Synthesis Kit (New England Biolabs, Ipswich, MA, USA). Amplicons were produced by using the OneTaq Quick-Load 2X Master Mix (New England Biolabs) with primers specific to DENV (7), CHIKV (forward: 5′-CGCCAACATTCTGCTTACAC-3′; reverse: 5′-AGGATGCCGGTCATTTGAT-3′), and ZIKV. The CHIKV amplification target was 649 bp of nonstructural protein 1 (NS1). A positive PCR for a partial region of the envelope (E) gene with primers ZIKVENVF and ZIKVENVR (8) was considered indicative of ZIKV infection. ZIKV primers specific for the E gene and NS1 were designed and used to amplify the E gene and NS1 for phylogenetic analyses, and amplicons were produced by using the OneTaq One-Step RT-PCR Kit (New England Biolabs). E gene and NS1 PCR products were sequenced at the University of Wisconsin–Madison Biotechnology Center (Madison, WI, USA).

Thumbnail of Majority-rule consensus tree based on Zika virus envelope and nonstructural protein 1 gene sequences (2,604 nt) of isolates from patients in Sincelejo, Colombia, October–November 2015, compared with reference isolates. The tree was constructed on the basis of Bayesian phylogenetic analysis with 8 million generations and a general time-reversible substitution model using MrBayes software version 3.2 (http://mrbayes.sourceforge.net). Numbers to the right of nodes represent posterior p

Samples from all patients were negative by RT-PCR for DENV and CHIKV; samples from 9 (41%) patients were positive for ZIKV. Among those 9 patients, 7 (78%) were male; median age was 23; and none had a history of international travel. ZIKV was analyzed by sequencing the E gene and NS1 of 2 isolates. Phylogenetic analyses rooted with Spondweni virus showed that the ZIKV sequences belonged to the Asian lineage (Figure) and were closely related to strains isolated during the 2015 outbreak in Brazil (5). The sequences also showed 99% identity with sequences from a ZIKV isolate from French Polynesia (GenBank accession no. KJ776791) (9). These data suggest that ZIKV circulating in Colombia could have been imported from Brazil, most likely as a result of tourism activities on Colombia’s northern coast, where the first reported case was identified (the state of Bolivar).

We report ZIKV infection in Colombia in association with an ongoing outbreak of acute maculoexantematic illness. Since detection of ZIKV in Sincelejo, a total of 13,500 cases have been identified in 28 of the country’s 32 territorial entities (10), all of which have abundant populations of Ae. aegypti mosquitoes and co-circulation of DENV and CHIKV. These circumstances highlight the need for accurate laboratory diagnostics and suggest that monitoring whether the virus spreads into neighboring countries (e.g., Ecuador, Peru, Venezuela, and Panama) is imperative.

Erwin Camacho, Margaret Paternina-Gomez, Pedro J. Blanco, Jorge E. Osorio, and Matthew T. AliotaComments to Author

Author affiliations: University of Wisconsin–Madison, Madison, Wisconsin, USA (E. Camacho, J.E. Osorio, M.T. Aliota); Universidad de Sucre, Sincelejo, Colombia (M. Paternina-Gomez, P.J. Blanco)

Read more: http://wwwnc.cdc.gov/eid/article/22/5/16-0023_article

It is true that Aedes Aegypti, the mosquito which carries Zika, lives in tropical and subtropical regions. Global warming, if it occurs, might increase the range of Aegypti. But there are close relatives of Aegypti, such as Aedes Albopictus, which might be just as dangerous. Albopictus has a much greater range than Aegypti, but carries similar viral diseases to Aegypti. I don’t know whether Albopictus can carry Zika, but this has to be considered as a significant possibility.

Albopictus is currently spreading through temperate zones in Europe, and has been detected as far North as Germany.

Even if it turns out only Aegypti can carry Zika, I doubt the most efficient response to dangerous mosquito borne diseases is to build a few wind turbines.

A good start to controlling mosquito borne diseases, might be to remove the pointless bureaucratic obstacles to spraying DDT, one of the most effective anti-mosquito chemicals ever developed.

Use of DDT was almost outlawed after vigorous scare campaigns by green groups, but this much maligned chemical is harmless to humans. Professor Kenneth Mellanby, who campaigned for the use of DDT in the 1940s, used to eat a substantial pinch of concentrated DDT as part of his demonstration. Mellanby did not suffer any health problems from his massive consumption of DDT – he died in 1993, at the age of 85 years.

Part of the reason DDT was and is so popular in the third world, is DDT is very easy to produce, a simple one step reaction any backyard lab could perform. With a few litres of precursor chemicals, an amateur laboratory could produce enough DDT for thousands of treatments. I suspect if authorities don’t remove bureaucratic obstacles to DDT use, people in Zika affected regions might start cooking their own.


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An Asteroid ‘could’ strike the earth.


well at least it would get rid of the mosquitoes

The big advantage of DDT is that it is as cheap as dirt and 1 application lasts 6 months. The alternatives cost a whole lot more and need much more frequent application.

Brian H

Not so, exactly. It is a repellant which works by disabling directional sensing, disorienting them. No mozzie corpses.


@Brian H – No. You may be confusing DDT (https://en.wikipedia.org/wiki/DDT) with DEET (https://en.wikipedia.org/wiki/DEET).

Bryan A

Climate Change could do almost anything either harmful or beneficial, COULD, or it COULD do nothing harmful at all

David Chappell

Maybe not. Whenever I am chasing the little buggers they disappear into a parallel universe.


Not only mosquitoes but numerous other insects as well. Can you imagine the totally devastating effect killing these insects would have on the rain forest ecosystem. We as humans may not like bugs or the diseases they carry but indiscriminate use of pesticide is not a good answer at all.


The mosquitoes survived multiple mass die offs in the past.


Will strike. But the Popperish question is when, where, how much exactly. A prediction. CAGW framework is good for scaring but not good for predicting.

Ric Haldane

You can thank the MSM for the Zika scare. Dengue is a real problem. Dengue is actually four viruses. I believe that Dengue2 is the worst. If you are infected with one type, you will be sick. If you get a second type, you have resistance to the first infection but the second infection will be worse. Dengue hemmorragic fever kills. That makes a vaccine difficult. Sanofi-Pasteur has a vaccine approved in three countries. The vaccine does help, but is far from perfect due to Dengue2. There is not much protection for Dengue2. Brazil, Mexico, and the Philippines are the countries that have approved the Sanofi vaccine as they may benefit. Thailand has a problem with Dengue2. The U. of NC may be on to a solution. There is also a company in Ma. that thinks they may have the problem solved and has licensed a company in Singapore to do clinical studies and produce a vaccine. Population density is part of the problem. A mosquito bites an infected person, then bites a another person, the disease spreads. Bangkok is having a problem because of the population density. Dengue may well be the real killer.

The link between the virus and birth defects seems just as tenuous as the link between global warming and the virus. The virus was first discovered over 60 years ago and up until now it was known for only mild symptoms affecting less than 1 in 4 who contracted it.
It is possible there is a cover up going on for something more sinister. What that might be, we will have to wait and see.


You mean like West Vile Nyrus? Mad Cow, SARS, Bird Flu, Anthrax . . . Zika only became a “problem” when a rich chick from the USA caught it in a slow news week. Could easily have been handled with a travel advisory for pregnant women.

Anthrax became an issue due to a rich chick from the USA? I could have sworn it was around long before there was a USA.
BTW, on a mostly unrelated topic, The Ice Man, Otzi, was infected with the Lyme disease bacterium. I don’t don’t know if it produced serious problems back then, but I amazed to hear the bacterium has been in the human population a lot longer than I expected.

Ric, Goldrider is saying that most of these “epidemics” only become “news” in the US when someone from the US contracts these diseases. Most of them have been around long before there was a USA, but the UN claps it’s hands and suddenly there’s a “new” horror being introduced AND blamed on climate change or capitalism or something else that can be pinned on the US somehow…

Joe - Texas

About 95% of the US population has been bit by a mosquito carrying the west nile virus. People coming down with the illness is only a small fraction of those being bit.

I understand that the last great scientific breakthrough was the release of millions of GMd mosquitoes which were going to rid the world of dengue and malaria through interbreeding. Did something go disasterously wrong? I think we should be told.


That’s what ZeroHedge is implying.


No, The linkage appears certain. This is not about the dishonest climate Trillion$$ wealth redistribution scam.
This is about the health and welfare of families.
Serious stuff. The stuff that shapes humanity.
I studied Hep C virus for years as a grad student. Published a “side” paper on Interferon A therapy on HepC patients. Flaviviruses can do anything from nothing to birth defects, destroy your liver, neurological syndromes such as Japanese Encephalitis Virus, to tick-borne diseases.
Joel O’Bryan, PhD in human viral immunology.


Actually, Zika does have a healthy whiff of dishonesty about it.
Only a small number of the 4,000 babies who’ve died in Brazil had the Zika virus.
This means a large number of the babies who died had no Zika in their brain.
Which means the Zika cases were coincidental.
From the BBC:
“Zika is generally mild and only causes symptoms in one in five people. It is spread by the Aedes aegypti mosquito, which also spreads dengue and chikungunya. The virus has been known about since before 1948 and has never been known to cause birth defects.”
If not Zika, what?
Brazil made a new Tdap shot mandatory at the beginning of 2015. The shots coincide perfectly with the 4,000 newborns born with the defect. ALL MOTHERS WITH DEFORMED BABIES GOT THE NEWLY FORMULATED TDAP SHOT WHILE PREGNANT.
The fact the papers and the electronic cyclops aka the idiot box aka TV are scamming Zika as the culprit implies, by omission, no one like the World “Health” Organization or the Gates and Rockefeller foundations or the bankers that own The City and the UN and the world’s money and media outlets or anyone in the “new world order” that’s on record as wanting to reduce earth’s population by four-fifths so they can have the planet’s resources for themselves, and who seek to develop passive, stupid, propaganda (MSM) addled, subservient Goyim to work for them while they live out their lives scrumptiously on a depopulated planet, had anything to do with the Brazilian Tdap jab/experiment.
No, nothing of that sort here. Move along now. We have a population to vaccinate.
Zika freakout: the hoax and the covert op continue
Is the dreaded Zika virus another giant scam?
Brazilians not buying Zika excuse for babies with shrunken brains

Really Joel? “The linkage appears certain?” I can only assume that is your own personal opinion because it does not reflect the opinions of the people who are actually working on or with the virus. (bold mine)
“The data to provide evidence linking the relatively mild mosquito-borne disease and babies born with small heads and potential brain damage, however, are not yet conclusive.”
“Although the Brazilian government has said there are almost 4,000 cases of microcephaly in the country, only six of the cases have been strongly linked to Zika virus via laboratory testing that confirms genetic material from the virus is present in the infant, Claudio Maierovitch, director of the Department of Communicable Disease Surveillance in Brazil’s Ministry of Health told the WHO today in Geneva.”

Wussr- where did you find anything that says that ANY of the 4,000 babies born in Brazil with microcephaly DIED? Much less all 4,000 of them???


My error. Should have read: “. . .of the 4,000 babies born with the defect.”

Thank you for correcting that wrussr…I consider mass deaths to be a huge error. 🙂


the brazilian ministry of health finds no certain linkage:
neither do they find any 4000 cases of microcephaly.
3.448 casos suspeitos de microcefalia em todo o país
270 casos já tiveram confirmação de microcefalia
6 com relação ao vírus Zika
270 confirmed cases of microcephaly
6 confirmed cases of a microcephalic with zika
so clearly, microcephaly causes mosquito bites
and there must be laws against pregnancy


It is difficult to explain why there have been no fetal cases of Zika virus infection reported until now but this may be due to the underreporting of cases, possible early acquisition of immunity in endemic areas or due to the rarity of the disease until now. As genomic changes in the virus have been reported[6], the possibility of a new, more virulent, strain needs to be considered. Until more cases are diagnosed and histopathological proof is obtained, the possibility of other etiologies cannot be ruled out.
and then?
theres the issue of the DTAP vaccine being given TO Pregnant women there..when it was NEVER tested for pregnant women or fetal problems, and it was fairly recent decision to do so. in the prebirth for most of these new cases of microcephaly.
as for the safety of DTT.. wtf?
its an organophosphate its as absorbable via OUR skin as a bugs
and they KNOW it causes neuro toxicity issues, it IS a listed effect
ok really careful limited dosage if they have no other option but wholesale spraying is insane! how many NONtarget bugs die and are eaten by birds etc..
the Pro DDT lobby here has always amazed me..its a Bloody toxic chem its EX Mil neuro-warfare development it didnt work fast enough in war ,so they found another use


my bad Organochlorine not phosphate;-(
that said..
Due to the persistence of DDT and its metabolites in the environment, very low levels may continue to be detected in foodstuffs grown in some areas of prior use (3). It has been suggested that, depending on patterns of international DDT use and trade, it is possible that dietary exposure levels may actually increase over time (3). Persons eating fish contaminated with DDT or metabolites may also be exposed via bioaccumulation of the compound in fish


Yep. Lot of things about these viruses are difficult to explain. Most are like The Man Who Fell to Earth. The just show up. I was wondering where the Zika virus came from and. . .Oh!. . .wait a minute . . .

DDT is no magic bullet here. Resistance to DDT was a big problem well before it was banned. Here is a 1960 paper on development of resistance by this same mosquito Aedes Aegypti.

the article also goes on to say that mosquitos also lose resistance. funny how you failed to mention that part. not.

“lose resistance”
Yes, in “insecticide-free conditions”.


DDT – what would say Rachel CARSON
maybe some NIGARI – will help human being – and it is cheap


How about the West Nile Virus…. Ain’t nuthing to do with Climate….
CDC sees no evidence of bioterrorism in spread of West Nile virus……
“In October 1999, the New Yorker magazine published an article describing claims by an alleged Iraqi defector that Saddam Hussein was planning to use West Nile virus as a weapon. The article, by Richard Preston, said bioweapons experts at the CIA had heard of the claim made in a book by the alleged defector, who called himself Mikhael Ramadan, and they recalled the claim when West Nile virus was identified in New York City in September 1999. Ramadan’s book, as quoted in Preston’s article, said Hussein had boasted that his scientists would develop a strain of West Nile virus “capable of destroying 97 percent of all life in an urban environment.” (The fatality rate for West Nile is far below 97%.)
Maybe there is a case for planting the bug here…

Bubba Cow

window screens work in “a warming world” – along with removal of standing water (breeding)



Lewis P Buckingham

One of my teachers was Professor Emmens who was reputed to have assisted in the clearing of Malaria in Italy after the end of WW2 by the use of DDT.
He saved many.
Filovirus is a very nasty thing and everything that can be done to control its spread, especially in Africa should be tried.
The local Africans are immune to the milder strains but visitors fall a victim.
This virus appears to have entered a happy hunting ground in South America with no widespread natural immunity.
The production of a vaccine is vital as well as mozzie control.
It is clearly an introduced pest, so will spread easily in a humid warm habitat with the abundant mozzies already present.
As for Climate Change, like death and taxes, it is always with us.
We need to adapt to it by using vaccine and mozzie controls,such as flooding areas with sterile males.


Breakdown in Soil and Groundwater
DDT is very highly persistent in the environment, with a reported half life of between 2-15 years (15, 16) and is immobile in most soils. Routes of loss and degradation include runoff, volatilization, photolysis and biodegradation (aerobic and anaerobic) (3). These processes generally occur only very slowly. Breakdown products in the soil environment are DDE and DDD, which are also highly persistent and have similar chemical and physical properties (12, 16).
Due to its extremely low solubility in water, DDT will be retained to a greater degree by soils and soil fractions with higher proportions of soil organic matter (12). It may accumulate in the top soil layer in situations where heavy applications are (or were) made annually; e.g., for apples (2). Generally DDT is tightly sorbed by soil organic matter, but it (along with its metabolites) has been detected in many locations in soil and groundwater where it may be available to organisms (12, 15). This is probably due to its high persistence; although it is immobile or only very slightly mobile, over very long periods of time it may be able to eventually leach into groundwater, especially in soils with little soil organic matter.
Residues at the surface of the soil are much more likely to be broken down or otherwise dissipated than those below several inches (14). Studies in Arizona have shown that volatilization losses may be significant and rapid in soils with very low organic matter content (desert soils) and high irradiance of sunlight, with volatilization losses reported as high as 50% in 5 months (17). In other soils (Hood River and Medford) this rate may be as low as 17- 18% over 5 years (17). Volatilization loss will vary with the amount of DDT applied, proportion of soil organic matter, proximity to soil-air interface and the amount of sunlight (12).
Breakdown of Chemical in Surface Water
DDT may reach surface waters primarily by runoff, atmospheric transport, drift, or by direct application (e.g. to control mosquito-borne malaria) (3). The reported half-life for DDT in the water environment is 56 days in lake water and approximately 28 days in river water (15). The main pathways for loss are volatilization, photodegradation, adsorption to water-borne particulates and sedimentation (3). Aquatic organisms, as noted above, also readily take up and store DDT and its metabolites. Field and laboratory studies in the United Kingdom demonstrated that very little breakdown of DDT occurred in estuary sediments over the course of 46 days (12).
the option for using DDT madly as they probably will..for a NON event like Zika really is..is stupid.

Mark And two Cats

“…babies [afflicted with] microencephaly, or abnormally small brains.”
Baby liberals!


..I’m pretty sure it affects ALL liberals !!


““…babies [afflicted with] microencephaly, or abnormally small brains.”
Baby liberals!”
Oops, best get rid of them ‘skeeters! And I mean YESTERDAY!

Well if that’s not a good reason to demand a return to DDT…I don’t know what is…:P


That is, if it really is a virus and not another facile political/economic distraction like the CAGW noise:
There may be a virus involved, but look at all the other potential co-factors — credibly harmful every one.
“Science” is such a great medium for cultural and social engineering, especially in a population already in endocrine exhaustion from fear-mongery and hysteria. This is compounded by the tendency to batten onto single-cause explanations. The pre-complexity paradigm is so entrenched…


I think air travel has more to do with the spread of the virus than CAGW, aka ‘climate change.’

charles nelson

So when 19th Century travellers brought back ‘shrunken heads’ as gruesome souvenirs……what was shrinking them back then?


Global Warming obviously shrunk those heads. It’s linked to all known and unknown science.

Let Me Google That For You. It’s a pretty simple process, if you join ISIS they’d likely be happy to give you some raw material. Pig heads might be a good substitute and worth mailing anonymously.
http://www.head-hunter.com/prep.html says in small [heh, heh] part:

A slit is made in the neck and up the back of the head, allowing the skin and hair to be carefully peeled from the skull. The skull is then discarded into the river and left as a gift to the pani, the anaconda.
Carefully, the eyes are sewn shut with fine native fiber. The lips are closed and skewered with little wooden pegs, which are later removed and replaced with dangling strings. From here the tsantsa goes to the sacred boiling pots or cooking jars. The head is simmered for approximately an hour and a half to two hours. If the heads were left for any longer, the hair would have fallen out. On removal from the pots, the skin is dark and rubbery, and the head is about 1/3 its original size. The skin is turned inside out and all the flesh adhering is scraped off with a knife. The scraped skin is then turned right side out and the slit in the rear is sewn together. What remains is similar to that of an empty rubber glove.


What? No photos?

Oh….I’m going to throw up now. And noaaprogrammer…be thankful for small favors…

You want photos? I didn’t notice anything more descriptive than the text, as head shrinking has been “discouraged” since the 1930s. Plenty of photos of the finished product, of course, but we’ve probably all seen them.


Photos?comment image&sp=cf14d3cd52170f667005ced9084307c5


It was the magic words what shrunk ’em:
“Ooo eee ,ooo ah ah ting tang
Walla walla ,bing bang
Ooo eee ooo ah ah ting tang
Walla walla bing bang”


Yeah, I remember when that song came out – particularly since I had been born in Walla Walla, Washington right after WWII.

Banishing DDT was another great “Green” idea!


DDT is very dangerous, to mosquitoes. The fact that we were lied to, such that DDT could be banned, has turned full circle and stung us in the arse. It’s time for spraying.


To mention an analogy of something that was once feared very harmful, but has since been discovered to be no danger at all, I would point to salt, and the exhaustive study that proved beyond almost all doubt that salt has no affect on blood pressure for 99.9% of people.
In fact, the study found that those with lowest salt/sodium intake had higher average blood pressure than those that consumed the most.
And other investigators have shown quite conclusively that the entire “avoid salt/sodium” meme was based on exactly ZERO research or empirical evidence! One guy started it all and everyone else just repeated it without question and it took on a life of it’s own as a “known thing”!
So, what was the response of the well known medical association which concerns itself with such matters, and helped organize the study to begin with? They refused to change their recommendation that people, especially those with high blood pressure, avoid salt!
Reminds me of NASA and some expensive satellites and the data they give.
Once people have it in their heads that something is dangerous, good luck getting them to change their minds.
Radiation example comes to mind. Lots of it can kill you…a little bit, not so much.
Ditto chorine. Figures that some group wants to blame chlorine for everything and ban it. Ban an element!
The one which may have saved more lives and extended health of more people than any other in history.
Wait, what was I talking about…

Menicholas – please can you provide a link to that study (salt and blood pressure).

Hyponatremia (low blood sodium levels) is much more dangerous than high blood sodium levels.

So the warmists want to blame CO2 with encouraging those mosquitos? I hope when this is accepted as tripe, and global cooling really sets in, CO2 will be credited with reducing the risk of Zika. Pigs might fly!

People help spread the virus after being bitten by an infected mosquito. Then, another mosquito becomes when they bite the now infected human. It all brings into sharp focus our porous southern border.
The maps noted on the news where Zika dominates show that Mexico is a good place to get the Zika virus.. So, how do we keep infected humans from crossing our southern border and infecting our home-grown mosquitos?


The Donald has an answer for ya.


The Donald is a blowhard idiot.

If Zika produces only mild symptoms in children, it seems to me that plausible outcome is that it becomes another disease of childhood and that by the time females approach their child bearing years that they will be protected by their own antibodies.


“Use of DDT was almost outlawed after vigorous scare campaigns by green groups, but this much maligned chemical is harmless to humans.”
We were just discussing DDT I’m my science class yesterday, and we learned that it is dangerous to birds, fish, as well as insects. Is this true? I mean, my teacher is an AGW skeptic (she has a master’s degree in paleoclimatology as well), but even she agrees that DDT is dangerous (as far as I know). How accurate is that idea that DDT has many detrimental environmental impacts?
I’m not gonna lie, I’m not by any means “experienced” in this subject (I’m only a sophomore in high school), but Im certainly smart enough to look at both sides of the debate. Hell, I used to be an AGW alarmist until I found this website. But as of now, I’m not sure what position to take about the use of DDT. Can I get some of your opinions?

John F. Hultquist

I have no special knowledge about this but recall that DDT was used on cotton in the Lower Mississippi Valley. Cotton buds and flowers were damaged by the boll weevil (Anthonomus grandis) and so DDT was used to kill the weevils. It is toxic to insects.
The chemical entered the food chain and had the unintended consequence of thinning bird eggs. These thin eggs crushed very easily and the bird population dropped. The Brown Pelican being the signature bird. The use of DDT was banned in 1972 and (with, I think, transfers from Florida) Pelicans have since recovered.
Many people now wish to use it indoors and with nets to protect people. Seems to work, as far as I know, without great harm to the environment.
Do a Bing or Google search with the “images” tag selected with the phrase (also, there are videos):
** ddt spraying community **

The accusation of DDT killing birds by thinning their eggshells is the most common charge against this insecticide.
But is not established by laboratory data – except when massive overdoses are used – much like the 1000x doses used by opponents on rats to show that cancer will be caused by this chemical ____ (fill in the blank of overdosed chemical.)
Eagle (and similar higher predatory birds, eating fish which are claimed to have been feeding on (dead ?) mosquitoes killed by DDT) are the species I have heard of most often. Pelicans? Possible – they are also marine predators. But the evidence is based on selective “bird nest studies” not able to be duplicated independently of the opponents to DDT who are claiming the losses.

John F. Hultquist

RACookPE1978 January 29, 2016 at 9:40 pm
AJ asked a question. No one answered.
I, with “no special knowledge” presented simple statements regarding the issue. Those things being that DDT was widely used (even sprayed directly on children), was thought to decrease bird populations (especially Brown Pelicans), and so on.
AJ’s question indicated interest in a subject and I provided enough key-words to help in further research.
If you, or anyone else, finds my answer wanting … well, have a real go at it.


A lot of pesticides that are nasty to their targets have little impacts on animals with livers. Livers aren’t perfect (as dogs that drink ethylene glycol antifreeze discover), but they’re one of the great products of evolution and detoxify and help digest all sorts of stuff.
Don’t leave home without one!


Does the quote below sound like it describes Climate Change Crusaders?
“Those who fail in everyday affairs show a tendency to reach out for the impossible. It is a device to camouflage their shortcomings. For when we fail in attempting the possible, the blame is solely ours; but when we fail in attempting the impossible, we are justified in attributing it to the magnitude of the task. There is less risk in being discredited when trying the impossible than when trying the possible. It is thus that failure in everyday affairs often breeds an extravagant audacity.”
– Eric Hoffer
The True Believer: Thoughts on the Nature of Mass Movements (1951)

“Could” or “might” = uncertain. Next.


But enough weasel words to defend yourself when it’s proven untrue, but visually skipped over by 97% of readers, who only see the radical claim and believe it.

The DDT ban of course goes back to the hysteria created by Silent Spring. I believe the ban has since been lifted.


But the damage is forever !!

Leonard Lane

Marcus, do you mean the untold millions who died from malaria when DDT was banned after Rachel Carson’s “Silent Spring”?


Yes Leonard, Not using DDT has killed millions that will stay dead forever !


sorry you believe wrongly
its still banned
along with aldrin and a pile of others.
DDT is no longer registered for use in the United States, although it is still used in other (primarily tropical) countries. It is in EPA Toxicity Class II, moderately toxic (2). DDT was banned from use in the United States in 1972, and remains banned barring public health emergency (e.g., outbreak of malaria) (3).
so unless you guys cop a HUGE spike in Malaria? its a nogo.


…If the dog didn’t stop to take a shit, he would have caught the rabbit !

Tony B

Have also seen the Zika virus blamed on GMO mosquitoes. If someone has a grindstone, Zika can be the ax.


Maybe a better link on the release of the genetically modified mosquitoes in the area from the source
Is it a coincidence?
Possibly, maybe they released the modified bugs where there are a lot of mosquitos, so a good chance of being coincident with another vector born illness.

Donna Pendergraft

Read zero hedge article on Zika virus.


“Even if it turns out only Aegypti can carry Zika, I doubt the most efficient response to dangerous mosquito borne diseases is to build a few wind turbines.”
But, once the wind turbines get done chopping up all the birds, maybe they will turn their attention to the ‘skeeters, and get to chopping on them!

Tom Judd

There’ll be more mosquitoes because those vapid tasteless temples to environmentalism that we call wind turbines unfortunately also chop up bats which happen to be efficient mosquito carnivores.

Robert Ballard

“Regions with increasing average temperatures are at increased risk of mosquito-borne diseases, as mosquitoes thrive in and move to warmer regions,” says Armstrong.
I suspect we will see travel advisories posted for arctic regions soon.

Alan Robertson

Summer in Alaska and trade your shirt for a mosquito shirt, because they will be that thick on your hide.

Tom Judd

Perhaps Mr. Armstrong would like to have a conversation with a Caribou sometime. If he could talk Caribou talk the Caribou in the Arctic National Wildlife Reserve (which is called the Arctic National Wildlife Reserve because it so happens to be in the Arctic) would inform him that the mosquitoes there are so ferocious that they literally can take up to half a pint of blood out of each of them on a daily basis. This actually happens to be more blood than lawyers take out of us on a daily basis. Now, Mr. Armstrong should genuinely try to learn Caribou talk since those chit chats might educate him enough to cease making stupid statements about warming weather leading to an abundance of blood sucking mosquitoes. And, he might actually learn that warm tropical climates, if they increase contagious bloodsuckers, it’s bloodsuckers in the form of NGO participants, government delegates, Michael Mann, IPCC types, and … lawyers.

Leonard Lane

Yes, if people believe mosquitoes only live in warm areas should hike the Rocky Mountains to some of the lakes there. Or the rolling plains of eastern Wyoming in summer. I once drove through a small valley in Woming and the cloud of mosquitoes was so thick it resembled a dense fog.

Mosquitoes will breed in any place where the temperatures are even slightly moderate and there is standing water. I live nowhere NEAR the tropics and I have to shock the water in my outdoor fountain several times a year to keep them at bay near my house.


I don’t know whether Albopictus can carry Zika,,,,,,,,, yes and it already has


The climate change we have been experiencing is caused by the sun and the oceans and Mankind does not have the power to alter it. So if current climate change is responsible for Zika spreading then Zitka will spread and we do not have the power to stop it.

Leo G

The link drawn by the CDC between Zika virus infection and microcephaly appears highly fanciful and I wonder to what extent it may be misreported.
Microcephaly, including congenital microcephaly, is not a rare condition- it cannot be. The Microcephaly is defined by head size compared with the normal population distribution of head sizes. The threshold is at 2 standard deviations below the mean, so 2.3% of the population are expected to be microcephalic.
I expect that the reports from Brazil of microcephaly at birth must be for a peculiar and rarer syndromic form and probably at -3SD or -4SD, but that is not clearly stated- nor is the association with Zika virus infection.


something no one seems to have mentioned either is fetal alcohol syndrome
smaller brains and sometimes head size as well..and a father whos an alcoholic is as possible to pass it onto a baby as an alcoholic mum as well.
I still suspect the DTAP Vaccine as the most likely cause of the “outbreak”
Zika has been around too long.


If you have no principles as a political activist it doesn’t take you long to your activist bandwagon to any crisis. I remember that every bush fire we have had in Australia has been the fault of ‘climate change’, along with every snow storm in the Northern Hemisphere. Every war and now every virus. I guess there is nothing for which CO2, and hence western civilization, cannot be blamed.

Leon Brozyna

Here we have utter stupidity on display once again … as though the environment is a static, unchanging thing and only changes because of man’s actions. All diseases are always changing. A new virus could spring up next week seemingly out of nowhere, anywhere on the planet and in less than a decade have a devastating impact on the human race. All it takes is one genetic roll of the dice by any reproducing organism and mankind could find itself having its own extinction event.

Richard Keen

Didn’t Climate Change help bring on the great plague, the Black Death of 1346? Something called the Little Ice Age?


and if a link is not established? we’re left with nothing but hype over a mild virus.
28 Jan: WHO: WHO Director-General (Margaret Chan) briefs Executive Board on Zika situation
A causal relationship between Zika virus infection and birth malformations and neurological syndromes HAS NOT YET BEEN ESTABLISHED, but is strongly suspected


Just don’t let them blame this on climate change. Dr. Paul Reiter’s video needs a lot more views – he had his name removed from the IPCC report because they wouldn’t listen to him. https://www.youtube.com/watch?v=-iZPkQWcRsI
There is also an article by Dr. Reiter here: http://news.heartland.org/newspaper-article/2008/02/01/modern-transportation-not-global-warming-allowing-spread-mosquito-relat

Could the outbreak be caused by genetically modified mosquitoes?
A fairly technical explanation. Despite the url.

Correlation is not causation.

Martin Lewitt

Any place where this mosquito would be a threat, probably should already have control programs in place for West Nile and St. Louis encephalitis.


Substitute explanation depending on time and geographical location:
All diseases and food shortages are caused by:
1: Angry gods and only priests can save us.
2: The activities of the America and CIA agents and only Stalin and Lysenko can save us.
3. Capitalism causing evil carbon pollution a.k.a. Climate Change and only Michael Mann, Al Gore, David Suzuki, John Cook, Stephan Lewandowsky, Naomi Oreskes/Klein, Ban Ki Moon etc can save us.
Misattribution of the factors which cause a problem can very often lead to solutions which are worse than the disease which they pretend to cure.
“Every age has its peculiar folly: Some scheme, project, or fantasy into which it plunges, spurred on by the love of gain, the necessity of excitement, or the force of imitation.” Charles Mackay, 1841.


The road to Hell is paved with liberal good intentions !!


Advertising companies love the words , could , might , possibly,
It doesn’t have to be true , just implies.
Carlsberg probably the best beer in the world, nowhere near but cannot tell them to remove that implication.


Summary: Global trade with used tires causes spread of mosquitoes and mosquito-borne disease, not climate change – excellent presentation!!! Thank You 4TimesAYear. his name removed from the IPCC report because they wouldn’t listen to him. https://www.youtube.com/watch?v=-iZPkQWcRsI every one should watch.

michael hart

Yes. That’s a superb talk.


every one should watch.
I’ll second that, Russell. The corruption of the science in this particular field by IPCC bandits is laid bare.


Charlie : The bad thing Government do to our lives; The US Government promoted smoking cigarettes, knowingly from 1940 through1980’s ; that it was the leading cause of cancer and death from cancer. It causes cancers of the lung, esophagus, larynx, mouth, throat, kidney, bladder, liver, pancreas, stomach, cervix, colon, and rectum, as well as acute myeloid leukemia. They covered this up by blaming Cholesterol i.e. saturated fat. This Cover up is well over 50 years old, and still goes on today. The greatest type 2 diabetes epidemic of today, leading to most if not all chronic illness. This lipid hypothesis has no scientific proof they just keep on lying.


Seems the “Experts” don’t know that it originated in Africa. Or more likely, who cares about the truth, we just want a scary headline.


Mmmmm ….. so you don’t think this is scary?


Simon said “Fair enough …. so places where it was cooler before, but warmer now, that have nectar, protein and water…. are at greater risk to the spread of this bug. I’d say that is something to watch wouldn’t you?”
As per the article, at 50 degrees F they shut down or go into hibernation. So, for example, where I live, they aren’t active until it’s over 50F, and the warmer it gets the more active they become. They like it over 80F. But there’s a 30 degree difference between the two. So, technically, ANY place on the planet that gets over 50F during the year, and where there is water, nectar and protein, is going to have mosquitoes. Whether it has “warmed up” or not.
This particular virus-“Zika” isn’t something that is genetic to mosquitoes. They have to contract it from a human, and then they have to bite, or transfer it, to another human. Almost every place on the planet has mosquitoes, and cooling the planet back down an “average” of 0.8 degrees wouldn’t kill them all off either. You’re being silly.

Why is it “scary”? There is ZERO evidence to support the claim that Zika causes birth defects of any kind, and the virus itself is fairly mild and doesn’t kill people like Malaria or Dengue fever does. If getting sick from mosquitoes was terrifying, no one would ever travel anywhere. But they do.
“Travelers frequently contract diseases, from malaria to measles, while abroad. The CDC diagnosed 14 returning travelers with Zika from 2007 to 2014. None of these cases sparked Zika outbreaks.”
“…most people infected with Zika clear the virus from their blood in less than a week. Mosquitoes can only become infected with the virus if they bite someone during that short window of time.”
—1 in 5 people exposed to Zika become ill. (20%) Symptoms are mild and last about a week and can include, rash, fever, pink eye, and join pain. (So basically a FLU like illness.)
The birth defects have been “associated” with the Zika outbreak in Brazil, but only 6 of the babies and their mothers (out of 4,000 children born with microcephaly) had Zika antibodies in their blood….so that simply cannot be the cause of the birth defects.


Back in the 70s when I was in the forces,in central America we used to spray DDT every night at dusk.We had a colony of breeding Herons downwind and lots of Terrapins just outside the perimeter none seemed affected and all wildlife seemed to carry on regardless but mosquitos disappeared.Greens have a lot to answer for.


And the Heron colony is still there now.


Cooking my own DDT – now there’s a proposal. I’m sick and tired of the sleepless nights from the useless creatures & that is enough reason to start making my own plans.

Patrick MJD

You could get your own “Carnivorous” plants like the Venus fly trap.

ezra abrams

I am sure that people here hate it when the media pick out one extreme example, and then present it as “news”
I listen to WBUR, Boston NPR on my morning drive; at 9am, they present an hour of live BBC news.
The BBC announcer said, is zika related to climate change ?
The BBC then presented about 20 sec of audio from an expert who said, basically, nah, really hard to see climate change/zika, but zika is in NE Brazil which is in a typical El Nino drought, so that might be related…
so, WUWT is doing what you all hate: presenting a few silly media people as representative of anything other then, a lot of the media hypes stuff and is silly.


..The greatest threat to Human survival is the fact that we no longer TRUST our scientists !!

DDT is currently allowed for mosquito control in all except a couple dozen countries, and the ones where it is not allowed are mostly ones without significant amounts of mosquito-borne disease. And the main reason for banning DDT either in those specific countries or for purposes other than mosquito control is not harm to humans, but harm to birds.


Until I was five we lived near a lake. Well, a wide place in the river. It was fun punting on it, but every year I’d be covered in really itchy welts at a certain time of year. My father got the river unclogged so the wide shallow place went away, and so did the mosquitos that bred there. I was a bit cross about no more punting, but the welty weeks were times of misery. As far as I can tell https://en.wikipedia.org/wiki/DDT_in_New_Zealand my country is one of the “couple dozen” that don’t allow DDT, period. Apparently birds aren’t harmed as much as was claimed. My wife and I got a mystery mosquito-borne disease in Australia once. There are several there. As far as I can tell (http://www.chem.unep.ch/pops/POPs_Inc/proceedings/bangkok/HARRISON.html) DDT is no longer allowed for any use in Australia.
The sixth of the good lands which I, Ahura Mazda, created
was Hardôyu with its lake.
Thereupon came Angra Mainyu, who is all death,
and he counter-created by his witchcraft the stained mosquito.
(Vendidad. Not my religion, but shows people have disliked mosquitos for a long time.)

Bruce Cobb

For Climate ghouls, anything bad can be linked to “climate”. Increased bad hair days? Climate. Halitosis? Climate. Heartbreak of psoriasis? Climate. Surly waiters? Climate. Etc. etc.

Whatever it is, if it is big and scary, it is caused or exacerbated by CO2 and it is coming to get you!!


There is grandeur in this view of Life™comment image


Isn’t a more workable hypothesis: ‘The CIA could introduce Zika Virus to a region it wishes to destroy…..’??