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Cancer: More bad news about pesticides


Date: 15/02/06
 
Keywords: Nutrition, Leukaemia
It comes as no surprise that there have been more reports on the negative effects pesticides can have on our bodies in the news lately. While pesticides do help to keep insects and other animals away from our homes and makes our produce look attractive, their use comes with a price according to a new report that suggests pesticides double the risk of childhood leukaemia.

It comes as no surprise that there have been more reports on the negative effects pesticides can have on our bodies in the news lately.

While pesticides do help to keep insects and other animals away from our homes and makes our produce look attractive, their use comes with a price according to a new report.

Insecticides may double the risk of childhood leukaemia

French researchers examined 280 children with acute leukaemia and 288 children who did not have leukaemia.

They questioned the parents about their employment history, the use of insecticides in the house and garden as well as the use of insecticidal shampoos against head lice.

The researchers found that the risk doubled in children whose mother's used insecticides in the home during and long after their pregnancies.

There was also a more than double risk for leukaemia development in children who were exposed to garden insecticides and fungicides.

Scientists also found that the use of insecticidal shampoos was associated with double the risk.

The study's author's called these results 'significant' and urged for children's exposure to insecticides to be as limited as possible.

The pesticide most commonly linked to leukaemia is a group called carbonates. These can be found in plant treatments, lice shampoos and insect sprays.

According to a recent Times Online article, the three most used carbamates in the UK are carbaryl, carbofuran and carbosulfan.

Since the end of 1995, the UK government's position on carbaryl changed, carbaryl is now considered to be a potential human carcinogen. In responce to this change, head lice shampoos containing carbaryl are now available by prescription only.

However, it is a good idea to avoid all insecticidal products. If you can't avoid using a pesticide, it would be wise to read all labels and make sure the product doesn't contain one of the three carbamates.

They can even effect male fertility

Researchers at the University of Michigan, Ann Arbor, US have suggested that exposure to non-persistent, or short-lasting, insecticides may play a role in male infertility.

Chlorpyrifos, and its metabolite TCPY, was one of the most common insecticides used in homes until 2000, when its use was restricted by the US Environmental Protection Agency.

In a previous report, Dr. John Meeker and colleagues found that higher levels of 1-naphthol (1N) in men's urine are associated with decreased sperm concentration and motility and increased DNA damage in sperm cells. 1N is a breakdown product of carbaryl, a lawn and garden insecticide known as Sevin, and the compound naphthalene, which is found in cigarette smoke, diesel fuel and other combustion byproducts.

In this study, Dr. John Meeker and his colleagues from the Harvard School of Public Health in Boston explored the association between TCPY and 1N, and reproductive hormone levels in 268 men who were recruited at an infertility clinic between 2000 and 2003.

They found that men with higher urine levels of TCPY and 1N had lower levels of the sex hormone testosterone. The association with TCPY was dose-dependent, such that testosterone levels decreased along with increasing levels of TCPY.

However, chlorpyrifos is widely used throughout the world. In the UK, the Pesticides Trust (now PAN UK) is in the process of contacting the Advisory Committee on Pesticides, the independent body that advises ministers, to press the case for an urgent review of the safety of chlorpyrifos. I will keep you updated on PAN UK's request for a safety review.

Pesticides are everywhere even in schools

In the e-alert, 'Protect yourself from the dangers of pesticides' (30/9/05), I shared with you the news that the fruit and vegetables given to our children in school contain more pesticides than those on sale in shops.

The Soil Association's Pesticides in School Children's Fruit report released on 21st September claimed that chemical residues were found in 84 percent of the fresh produce in schools, rising to 100 percent in some types of fruit.

Apparently these results are because the produce supplied under the Government's School Fruit and Vegetable Scheme (SFVS) were of lower quality than those sold in shops.

I haven't been able to find any information on whether any action is being taken as a result of this report. However, I would hope that steps are being taken to provide our chidren with good, health sources of fruit and vegetables.

Beyond eliminating our personal use of pesticides in our homes and garden, there is another way we limit our exposure and that is to buy organic fruit and vegetables. Many supermarket chains across the country now offer organic produce right next to the conventionally grown fruits and vegetables. So you won't have to go out of your way to find organic produce anymore. You may have to pay a higher price for your produce, but it is worth the price to know that you are providing yourself and your family with good quality (pesticide-free) food.
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