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March Babies not so Bright? – Pesticides to Blame?

Byoliveridley

An Indiana scientist makes a rather provocative argument that exposure to pesticides in the womb can explain why Indiana babies conceived in July-August (Born March and April?) have lower achievement scores than the other kids.

ScienceDaily: Conception Date Affects Babys Future Academic Achievement

Dr. Winchester and colleagues linked the scores of the students in grades 3 through 10 who took the Indiana Statewide Testing for Educational Progress (ISTEP) examination with the month in which each student had been conceived. The researchers found that ISTEP scores for math and language were distinctly seasonal with the lowest scores received by children who had been conceived in June through August.

“The fetal brain begins developing soon after conception. The pesticides we use to control pests in fields and our homes and the nitrates we use to fertilize crops and even our lawns are at their highest level in the summer,” said Dr. Winchester, who also directs Newborn Intensive Care Services at St. Francis Hospital in Indianapolis.

“Exposure to pesticides and nitrates can alter the hormonal milieu of the pregnant mother and the developing fetal brain,” said Dr. Winchester. “While our findings do not represent absolute proof that pesticides and nitrates contribute to lower ISTEP scores, they strongly support such a hypothesis.”

Well, that is a bold leap of faith, and use of a correlation=causation argument that I don’t appreciate in most cases. Has this kind of work been done in other countries, or in urban environments without pesticide use?

I am sure that many chemicals have subtle, but significant effects on developing fetuses. And the chemicals the authors mention have links with hypothyroidism..

Nitrates and pesticides are known to cause maternal hypothyroidism and lower maternal thyroid in pregnancy is associated with lower cognitive scores in offspring.

There is a link, but without further data, I think the conclusions are a stretch. But, something to keep in mind I guess if you live in Indiana and want to plan a baby!

Disclaimer: I was conceived in June, and was in the upper echelons of achievement through school. So, by the power of personal experience, I am predisposed to scepticism. OTH, I grew up in a big city with consistently high pollution levels throughout the year and not much pesticide exposure.

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    Friedman, India and Development

    Byoliveridley

    Where Thomas Friedman of the New York Times echoes a blog post of mine from a few months back about cheap cars, development models and India.

    We have no right to tell Indians what cars to make or drive. But we can urge them to think hard about following our model, without a real mass transit alternative in place. Cheap conventional four-wheel cars, which would encourage millions of Indians to give up their two-wheel motor scooters and three-wheel motorized rickshaws, could overwhelm India’s already strained road system, increase its dependence on imported oil and gridlock the country’s megacities.

    No, No, No, Don’t Follow Us – New York Times

    Here’s what I had to say…

    Is it necessary that India and China tread the same path as the U.S and Europe? Does India have to make and use cars that are built using technology developed prior to our knowledge of global warming? The same company that gets cautious praise from the Union of Concerned Scientists for its “leadership” role in global warming will turn around and build factories in India that carry the status quo forward for another 30 years. When you’re starting from the foundation, and you know that the plans provided to you will lead to your house crumbling in 20 years, would you use the plans anyway because your contractor provides you with no alternative? The logical answer seems to be no, but is this process logic driven, or enforced by the existing power structure?

    The answer should be “NO!!”. But Friedman goes ahead and offers some sensible suggestions via the very excellent Sunita Narain.

    Charge high prices for parking, charge a proper road tax for driving, deploy free air-conditioned buses that reach every corner of the city, expand the existing beautiful Delhi subway system, “and then let the market work,” she added.

    Good idea. Now, will Friedman turn around and offer the same prescription for the US? Apparently not. If the US cannot kick the car habit, or show other people how to, this kind of lecturing is pointless.

    Blogged with Flock

  • Melamine – The FDA Says the Right Things

    Byoliveridley

    But can it follow up?

    FDA limits Chinese food additive imports – USATODAY.com

    The Food and Drug Administration is enforcing a new import alert that greatly expands its curtailment of some food ingredients imported from China, authorizing border inspectors to detain ingredients used in everything from noodles to breakfast bars.

    The new restriction is likely to cause delays in the delivery of raw ingredients for the production of many commonly used products.

    Inspectors are now allowed to detain vegetable-protein imports from
    China because they may contain the chemical melamine. Melamine, used in
    the manufacture of plastics, was found in the wheat gluten and rice
    protein concentrate that has led to the recall of 5,300 pet food
    products.

    Good, and about time. The FDA cites “control issues” in issuing this alert.

    Now for the products to reach U.S. foodmakers, the importers will have
    to prove to the FDA that they are safe. The ingredients restricted
    include wheat gluten, rice gluten, rice protein, rice protein
    concentrate, corn gluten, corn gluten meal, corn by-products, soy
    protein, soy gluten, mung-bean protein and amino acids.

    Excellent stuff, exactly what was needed, to put the onus on the manufacturer to prove safety. Here’s the FDA’s press release.

    The onus, of course, is on enforcement. Can the FDA identify every item on this list, and quarantine it until a certificate is produced? Can it subject a random number of these products to independent verification to avoid cheating? Does it have the resources? Does it have the inspectors? Stay tuned.

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    Clothianidin and the Colony Collapse Disorder

    Byoliveridley

    Clothianidin is the pesticide at the center of controversy. It is used to coat corn, sugar beet and sorghum seeds and is part of a class of pesticides called neonicotinoids. The pesticide was blamed for bee deaths in France and Germany, which also is dealing with a colony collapse. Those two countries have suspended its use until further study. An EPA fact sheet from 2003 says clothianidin has the potential for toxic chronic exposure to honey bees, as well as other pollinators, through residues in nectar and pollen.

    Lawsuit seeks EPA pesticide data

    Interesting story. For more on the Colony Collapse Disorder...

  • Big Wool and Fast Fashion

    Byoliveridley

    Cute sheep or not, factory farming is always impactful

     

    According to one analysis of wool production in Australia, by far the world’s top exporter, the wool required to make one knit sweater is responsible for 27 times more greenhouse gases than a comparable Australian cotton sweater, and requires 247 times more land.

    Source: Big Wool wants you to believe it’s nice to animals and the environment. It’s not.

    This is an interesting article in Vox on the outsized impacts of large-scale factory farming wool impacts. The article goes into further detail comparing wool to synthetics on impact (Both big, but different), and why plant-based alternatives like Tencel and Hemp and recycling have not taken off. It also discusses the increasing trend of wool blends.

    Widespread cheap synthetics have enabled fast fashion, making it possible for brands to produce stupefying volumes of disposable fabrics. These are now very commonly combined with wool to create hybrid garments. According to the Center for Biodiversity and Collective Fashion Justice’s recent analysis of 13 top clothing brands, more than half of wool items were blended with synthetics, giving them in-demand properties like machine washability

    Of course when you blend a wool and a synthetic, it is now landfill material. The issue with clothing (same as the issue with most scaled up factory production) is scale and economics. Fast fashion makes clothes that fall apart in 6 months and are impossible to fix. So whatever the raw material used, this trend ensures high production, quick profit, large impact and large waste. In addition, factory-scaled animal production is not really compatible with animal welfare.

    Unless the system changes, which will require a massive re-examination and re-jigging of our financial systems and reward/responsibility mechanisms, we will always have this issue.

  • Melamine – Now in Humans

    Byoliveridley

    Once again, there’s no evidence that melamine at such low levels would pose any threat to humans. (or pigs, I guess, they have other issues to worry about!). It is the lack of ingredients control, and the casual diversion of food considered unfit for pet consumption to animal feed. If you did this to some other, more dangerous contaminant, and I don’t see any reason why the same thing would not happen, we’d be in a lot more trouble. The U.S did not really learn any lessons from the mad cow scare.

    In a way, I am glad this story has unfolded the way it did, slowly, and methodically up the food chain, finally reaching humans. It provides some insight into how the US government “regulates” food, and what needs to be done to shore up this program. (hint, better regulation, more money, more inspectors!). Of course, as a cat owner, (and one who had an unexplained trip to the hospital to treat said cat for puking and general stomach issues), I wish that cats were not the canary in this particular food safety scare, but I guess it really made people pay attention.

    Report: Tainted hogs enter food supply – Yahoo! News

    Several hundred of the 6,000 hogs that may have eaten contaminated pet food are believed to have entered the food supply for humans, the government said Thursday.

    No more than 345 hogs, from farms in three states, that possibly ate tainted feed are involved, according to the Agriculture Department. It appears the large majority of the hogs that may have been exposed are still on the farms where they are being raised, spokeswoman Nicol Andrews said.

    Salvaged pet food from companies known or suspected of using tainted ingredients was shipped to hog farms in seven states for use as feed. A poultry feed mill in an eighth state, Missouri, also received possibly contaminated pet food scraps left over from production. The fate of the feed made from that waste was not immediately known.

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    Circumcision and AIDS – Revisited

    Byoliveridley

    condom.jpg

    A post I wrote quite a while back on circumcision and AIDS remains my most commented post ever. In it (if you’re too lazy to click) I said that while research indicating a reduction in HIV infection in circumcised men was promising, there were a couple of concerns. One, that this could be a distraction from the single most effective prevention measure (no, not abstinence!), condom use. And two, that in certain cultures, especially among Hindus, this would be an absolute no no because circumcision is identified with being Muslim.

    Anyway, in a review article, the Cochrane Centre in South Africa summarizes results from a meta analysis of a number of trials indicating a 50% reduction in HIV incidence among circumcised males. At this point in time, it is clear that circumcision is effective in reducing HIV incidence among heterosexual males. Based on this, the institute encourages the widespread use of circumcision as an AIDS prevention strategy.

    So, am I still circumspect? Absolutely. I am still concerned that this research will be misinterpreted in a way that discourages condom use. In fact, the authors note that circumcised men indulged in more risky behaviour. Also, the incidence of HIV in the women these men were sleeping with increased from 9.6% to 13.8%, a 40% uptick. This increase was not statistically significant. No arguing with that, though the study was stopped early once it was clear that the men were helped, never mind the women, or reaching statistical significance in their case.

    Given that it is very unclear what the effects of circumcision are on anything other than circumcised penises, which are only one half of the equation (or less!), I don’t think it is responsible to call for widespread use of circumcision as a public health strategy for the prevention of HIV until its effects on the other parties are known. While people are aware of this issue, I don’t think the science or the cultural landscape promote the use of circumcision as a HIV prevention strategy until its proven that women are not at risk from increased HIV incidence either biologically from a yet unknown mechanism, or socially from increased risk taking.

    Men have more power in most societies to demand and receive sex on their terms. So the male centric nature of this research, and the conclusions drawn are disturbing. How irresponsible is it to encourage a public health strategy that appears to increase risk taking behaviour among men when the effects on the women are yet unknown, with only a statistically “insignificant” 40% increase in HIV incidence among women being observed?

    I am. for very good reason, still circumspect on circumcision.

    Whisky flavoured condoms courtesy bruno  girin’s photostream used under a creative commons license. Now how’s that for a turn on, whisky!