How Safe Is The US Food Supply?

A good summary of the state of food safety regulation in the United States.

How Safe Is The Food Supply?

These known cases make up a tiny fraction of the overall problem–an estimated 76 million illnesses and 5,000 deaths in the U.S. from food poisoning each year. Meanwhile, imports of food, some from countries without strict controls, soared to more than 9 million shipments last year doubling since 2002. The cash-strapped FDA is able to inspect less than 1% of imports. It’s a recipe for disaster. “Our food-safety system in this country is broken,” warned former FDA Commissioner Dr. David A. Kessler at a recent congressional hearing.

Few incidents ever have a body count high enough to shock the country into making fundamental changes. Overall, “we do have a very safe food supply,” says Sanford A. Miller, former director of the FDA’s Center for Food Safety & Applied Nutrition. But the alarms over pet food and vitamin A have lit a fire under lawmakers and executives. On May 2 the Senate rushed to pass a bill by a vote of 94-0 giving the FDA more responsibilities, such as creating databases of adulterated food. Meanwhile, food producers have been holding emergency meetings with suppliers, looking for problems in their factories or supply chains. Companies are “feverishly examining their own purchasing policies and trying to ensure they are followed,” says Kovacs.

Note that it is always tempting to blame the bureaucrats here. Bureaucracy is a dirty word in this country, associated with “red tape”, “corruption”, “standing in the way of business”, “pencil pushers”, “big government”, you name it, they get called it. But, agencies like the EPA and the FDA have competent scientists who know what they are doing. But, without the money and the authority, which is given to them by the political arm of the government, they cannot do much. They have also, in recent years, been headed by political appointees who come from the industry they are supposed to regulate and show a distaste for regulation which is in complete opposition of the mandate they are supposed to fulfill as the head of a regulatory agency.

It’s easy to take potshots at the FDA, but remember who gives them the money, makes the rules and tells them what not to oversee.

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    Ionic Air Purifiers may actually Increase Particle Concentrations

    Take that, Sharper Image, your air purifiers that you waste tons of paper sending me monthly catalogs for don’t work. The ones that use ozone react with organic compounds in the air, especially your fragrances in cleaning products, air fresheners and perfumes to make fine particles in that crucial 0.1-1 um size range that your lungs don’t clear very effectively.

    Not a big deal in the grand scheme of things, especially with other indoor pollutants. But I always thought these air purifiers were a scam, I am glad somebody actually got the NSF to fund this study and get some proof!

    Kinetic Analysis of Competition between Aerosol Particle Removal and Generation by Ionization Air Purifiers

    Kinetic Analysis of Competition between Aerosol Particle Removal and Generation by Ionization Air Purifiers

    Ahmad Alshawa, Ashley R. Russell, and Sergey A. Nizkorodov*

    Department of Chemistry, University of California, Irvine, California 92697-2025

    Abstract:

    Ionization air purifiers are increasingly used to remove aerosol particles from indoor air. However, certain ionization air purifiers also emit ozone. Reactions between the emitted ozone and unsaturated volatile organic compounds (VOC) commonly found in indoor air produce additional respirable aerosol particles in the ultrafine (This model predicts that certain widely used ionization air purifiers may actually increase the mass concentration of fine and ultrafine particulates in the presence of common unsaturated VOC, such as limonene contained in many household cleaning products. This prediction is supported by an explicit observation of ultrafine particle nucleation events caused by the addition of D-limonene to a ventilated office room equipped with a common ionization air purifier.

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    Common chemicals are linked to breast cancer

    The LA Times features a study arising from the Silent Spring institute.

    Common chemicals are linked to breast cancer – Los Angeles Times

    More than 200 chemicals — many found in urban air and everyday consumer products — cause breast cancer in animal tests, according to a compilation of scientific reports published today.

    Writing in a publication of the American Cancer Society, researchers concluded that reducing exposure to the compounds could prevent many women from developing the disease.

    The research team from five institutions analyzed a growing body of evidence linking environmental contaminants to breast cancer, the leading killer of U.S. women in their late 30s to early 50s.

    Experts say that family history and genes are responsible for a small percentage of breast cancer cases but that environmental or lifestyle factors such as diet are probably involved in the vast majority.

    “Overall, exposure to mammary gland carcinogens is widespread,” the researchers wrote in a special supplement to the journal Cancer. “These compounds are widely detected in human tissues and in environments, such as homes, where women spend time.”

    The scientists said data were too incomplete to estimate how many breast cancer cases might be linked to chemical exposures.

    The resources to come out of this study include two databases, one that summarizes animal mechanistic studies, and one that summarizes human epidemiological studies. It’s a good start and I hope these databases are continually expanded. The study was essentially a big lit review and data organization project.

    There are two major issues with the way carcinogenicity is studied. Firstly, animals other than humans are dosed at high levels to test for possible cancer outcomes. This leaves most researchers vulnerable to the charge that these high dose studies do not translate well to humans because the dose-response relationship at ambient levels is not well studied. So, the obvious criticism is that just because cancer endpoints were seen at high levels does not mean that the same thing will happen at low levels. This cuts both ways, though. We’re seeing with bisphenol A that low doses can cause more harm than intermediate doses. Another issue is the additivity of the interactions. Does 1 “dose” of PAH + 1 “dose” of PCB = 2 “doses” of PAH? We’re exposed to a whole host of chemicals all our lives, who knows which ones add, which ones subtract, which ones multiply, etc.

    Of course, as with most diseases, some macro variables dominate. For instance, the US has seen 8-9% decline in breast cancer incidence recently due to a decreased use of hormone replacement therapy. So, as with all diseases, taking care of some of these big ticket items is very important. One discouraging story I read today reported on a four percentage point decline in mammograms (70 to 66%) in women age 40 and older. Why? decreased access to health insurance and dropping the ball on promotion.

    The depressing fact of the matter is that the boring basics of good preventative healthcare, screening, good lifestyle and diet are the most important factors, and if we take care of these factors, we will make most health issues easier to deal with.

  • U.K Hospitals – Get that filthy tie out of here!

    It may be no surprise to some that doctors frequently transmit diseases amongst patients in hospitals. And bugs in hospitals, raised on a steady diet of antibiotics, tend to be hardy, drug resistant and deadly. Among the many sensible things doctors need to do (ahem, wash your hands doc!), turns out that the clothes you wear make a difference. So, in the U.K, where they worry about these things, doctors are being issued a dress code. Read on for some biting criticism of that most pointless of neck appendages.

    U.K. hospitals issue doctors’ dress code – Yahoo! News

    “British hospitals are banning neckties, long sleeves and jewelry for doctors — and their traditional white coats — in an effort to stop the spread of deadly hospital-borne infections, according to new rules published Monday.

    Hospital dress codes typically urge doctors to look professional, which, for male practitioners, has usually meant wearing a tie. But as concern over hospital-borne infections has intensified, doctors are taking a closer look at their clothing.

    ‘Ties are rarely laundered but worn daily,’ the Department of Health said in a statement. ‘They perform no beneficial function in patient care and have been shown to be colonized by pathogens.’

    Please frame that statement, ties are pointless, ties perform no beneficial functions, down with ties!

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    ES&T Online News: E-waste recycling spews dioxins into the air

    ES&T Online News: E-waste recycling spews dioxins into the air

    When computers, televisions, music systems, and other electronic products reach the ends of their lives, they often end up in China or other developing countries as e-waste. Such waste is a serious environmental threat in these parts of the world because of the poorly regulated conditions under which the waste is dismantled. A new study published in ES&T (DOI 10.1021/es0702925) shows that Guiyu, a major e-waste recycling center in China, has the highest documented levels of atmospheric polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs) in the world.

    In e-waste recycling centers in China, discarded products are dipped into open pits of acid and heated over grills fueled with coal blocks to extract precious metals, such as gold. These processes often release toxic metals, such as lead, and organic compounds, such as dioxins. The emissions are not regulated, and occupational exposure is high because of the poor working conditions for e-waste recycling laborers.

    In March 2007, researchers at Hong Kong Baptist University showed that soil at e-waste recycling sites in China has high levels of dioxins and polybrominated diphenyl ether (PBDE) flame retardants. (Read the paper at ES&T‘s ASAP website.) More recently, another study published in ES&T showed that the workers at these sites have blood levels of the heavy PBDE, BDE–209, 50–200 times higher than those previously reported. Whereas dioxins are potentially carcinogenic for humans, PBDEs affect thyroid metabolism and brain development.

    In the current study, Ping’an Peng of the Guangzhou Institute of Geochemistry (China) and his colleagues sampled the air from Guiyu for a week in both the summer and the winter and analyzed the samples for 2,3,7,8-PCDD/Fs. The levels varied between 64.9 and 2765 picogram per cubic meter (pg/m3). The toxic equivalents (TEQ)—a value used to account for the different levels of toxicity of the individual dioxins—was 0.909–48.9 pg TEQ/m3. Given that Guiyu has no municipal or medical solid-waste incinerators, which are known to be major sources of dioxins, the authors attributed the elevated dioxin levels to e-waste recycling.

    The team also found that the dioxin concentrations in the air around Guiyu were 12–18 times higher than those in Chendian, a town 9 kilometers (km) from Guiyu, and 37–133 times higher than those in Guangzhou, which is 450 km from the e-waste site. The results suggest that dioxin pollution from e-waste recycling is spreading to nearby areas.

    When they calculated the exposure of adults to dioxins through inhalation, the researchers found that it (68.9 and 126 pg TEQ per kilogram per day in the summer and winter, respectively) was a whopping 15–56 times higher than the World Health Organization recommended maximum of 1–4 pg TEQ/kg/day.

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    Gaping Reminders of Aging and Crumbling Pipes – New York Times

    Gaping Reminders of Aging and Crumbling Pipes – New York Times

    Local and state officials across the country say thousands of miles of century-old underground water and sewer lines are springing leaks, eroding and — in extreme cases — causing the ground above them to collapse. Though there is no master tally of sinkholes, there is consensus among civil engineers and water experts that things are getting worse.

    The Environmental Protection Agency has projected that unless cities invest more to repair and replace their water and sewer systems, nearly half of the water system pipes in the United States will be in poor, very poor or “life elapsed” status by 2020.

    Yes, sewers are unsexy, there’s no new fancy science involved. But water and sewer systems are the very basis of public health, and the biggest reason why Americans don’t die of sleeping sickness and dengue fever (or their subtropical equivalents) in large numbers evey year. People who want to cut taxes and limit government need to keep this in mind. There’s no money to be made out of building and maintaining sewers, it’s a dirty job and government has to do it, or else nobody will, and money is required. We produce the waste, we need to be taxed appropriately for it. It’s that simple.

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    India at 60 – A Public Health Perspective

    Well, at least I don’t have to take part in endless parades and listen to speeches any more. But India turned 60 today, and the head of the Indian public health foundation takes stock, and it is sobering.

    The Hindu : Persisting public health challenges

    Recent health indicators in India are a cause for both celebration and concern. While life expectancy at birth has risen to 63 years, infant mortality rate (IMR) and maternal mortality rate (MMR) are still at unacceptably high levels (57 per 1000 and 301 per 100,000 live births respectively). There is widespread disparity among States with Kerala being the star performer. Within States, the rural areas are way behind the urban segments. Even as our economy has grown rapidly, the nutritional status of children has remained stunted, suggesting that wide income disparities are preventing the poor from becoming the beneficiaries of growth.

    Yes, I be the killjoy.

    More from Amartya Sen

    There is reason enough to celebrate many things happening in India right now. But there are failures as well, which need urgent attention. For example, there is still widespread undernourishment in general and child undernutrition in particular–at a shocking level. The failures include, quite notably, the astonishing neglect of elementary education in India, with a quarter of the population–and indeed half the women–still illiterate.

    The average life expectancy in India is still low (below 64) and infant mortality very high (58 per 1,000 live births). It is certainly true that India has narrowed the shortfall behind China in these areas–that is, in life expectancy and infant mortality–but there is still some distance to go for the country as a whole. The problems are gigantic in some of the more “backward” states like Bihar and Uttar Pradesh. And yet there are other states in which the Indian numbers are similar to China’s.

    he goes on…

    If India has to overcome these failures, it has to spend much more money on expanding the social infrastructure, particularly school education and basic health care. It also needs to spend much more in building up a larger physical infrastructure, including more roads, more power supplies and more water. In some of these, the private sector can help. But a lot more has to be spent on public services themselves, in addition to improving the system of delivery of these services, with more attention paid to incentives and disciplines, and better cooperation with the unions, consumer groups and other involved parties.

    Ah, basic and boring infrastructure building!