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Topic: Malathion


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In the News (Mon 7 Dec 09)

  
  Malathion - Wikipedia, the free encyclopedia
In 1976, numerous malaria workers in Pakistan were poisoned by isomalathion, a common impurity in malathion, which is capable of inhibiting carboxyesterase enzymes in those exposed to it; the original toxicity evaluation for malathion had not anticipated isomalathion coexposure.
Malathion is used as a treatment for head lice, body lice and Scabies.
Malathion is also used in conjuction with diesel to fog an area where there are plenty of mosquitoes.
en.wikipedia.org /wiki/Malathion   (399 words)

  
 ATSDR - ToxFAQs™: Malathion
Malathion is used to kill insects on farm crops and in gardens, to treat lice on humans, and to treat fleas on pets.
Malathion does not stick to soil and is broken down rapidly by bacteria in the soil, so it does not usually move from the soil to groundwater.
In areas where malathion is sprayed to control medflies or mosquitos, families can reduce exposure by remaining inside during spraying periods, and by washing their hands and clothes if they come in contact with sprayed surfaces within a few days of the spraying.
www.atsdr.cdc.gov /tfacts154.html   (1192 words)

  
 EXTOXNET PIP - MALATHION
Malathion is suited for the control of sucking and chewing insects on fruits and vegetables, and is also used to control mosquitoes, flies, household insects, animal parasites (ectoparasites), and head and body lice.
As protein intake decreased, malathion was increasingly toxic to the rats [78].
Malathion is highly toxic to aquatic invertebrates and to the aquatic stages of amphibians.
extoxnet.orst.edu /pips/malathio.htm   (1480 words)

  
 TB225 Malathion Fate in Water and Catfish
Malathion is used in boll weevil eradication for several reasons: (1) it is highly effective; (2) low application rates and the undiluted ULV method of application make it economical; and (3) it is safe to mammals and many other non-target organisms, including channel catfish.
Malathion ULV is applied at the rate of 296 milliliters (10 fluid ounces or 0.76 pounds) of active ingredient per acre.
Malathion was not detected in water samples taken from pond B at 48 hours after dosing or in samples taken from pond A at 168 hours (7 days) after dosing.
msucares.com /pubs/techbulletins/tb225.htm   (4747 words)

  
 CBC Manitoba - Features - Malathion vs. Mosquitoes - Experts split on safety, efficacy
Critics of the city's use of malathion say the insecticide is ineffective and causes health problems.
Maxwell says the long-term health risks of malathion may not be worth the short-term benefit of possibly having fewer mosquitoes around for a few days.
Peter Parys with the city's insect control branch, says the city plans to continue using malathion because it's federally approved and is being used appropriately.
www.cbc.ca /manitoba/features/malathion/experts.html   (560 words)

  
 Malathion (PDS)
Malathion is an effective insecticide against most household pests and has been used to control houseflies, cockroaches, mosquitos, aphids, animal ectoparasites and human head and body lice.
The principle metabolite in early samples was the monoacid of malathion and in later samples the diacid.
This was caused by the use of batches of malathion with a higher toxicity than usual due to the presence of contaminants (see section 2.1.4) and the neglect of safety precautions, especially washing and changing clothes after work.
www.inchem.org /documents/pds/pds/pest29_e.htm   (3179 words)

  
 Malathion - What is it   (Site not responding. Last check: 2007-09-16)
Malathion has been widely studied in a variety of systems, but there is still some controversy over malathion's mutagenic and/or genotoxic potential for humans.
There has also been some evidence of malathion having a teratogenic effect (the ability to cause birth defects): the offspring of rats fed with 240 mg/kg/day (milligrams per kilogram of body weight per day) malathion exhibited growth retardation and elevated mortality, although no negative effects were observed in the parents (8).
Lipowitz showed that exposure to environmental pesticides (one of which was malathion) resulted in a 10-20 fold increased incidence of a particular cytogenetic aberration in a population of agricultural workers.
www.ncchem.com /malathion.htm   (426 words)

  
 MedlinePlus Drug Information: Malathion (Topical)   (Site not responding. Last check: 2007-09-16)
Malathion (mal-a-THYE-on) belongs to the group of medicines known as pediculicides (medicines that kill lice).
Malathion is applied to the hair and scalp to treat head lice infections.
Apply malathion by sprinkling on dry hair and rubbing in until the hair and scalp are thoroughly moistened.
www.nlm.nih.gov /medlineplus/druginfo/uspdi/202336.html   (1268 words)

  
 Malathion Research Update
Malathion undergoes a chemical reaction in sunlight called "photolysis" which results in increasing the formation of the highly toxic trimethyl impurities.
Malathion content had reduced from 100 down to 25 micrograms, so therefore, the Florida Department of Agriculture spokespeople are correct when they say it "breaks down" relatively quickly (although in this case not in a matter of hours).
In the case of malathion spraying, this carcinogenic and lethal intoxication is deemed appropriate to allegedly protect citizens against hypothetical biological attacks, man-made or natural.
www.invisiblegardener.com /magazine/news/malathion_research_update.htm   (5713 words)

  
 Malathion archives, jacksonsun.com - The Jackson Sun - Jackson, Tennessee
In an effort to address the concerns of people who say malathion crop dusting is making them sick, the Boll Weevil Eradication Program is trying to step up its use of helicopters and ground sprayers.
The FBI sent an agent to Crockett County on Thursday to investigate allegations that a crop dusting plane was hit by a bullet while spraying the pesticide malathion on cotton fields near Maury City.
There may not be any conclusive evidence about the health risks of the pesticide malathion, but there certainly is no shortage of words on the subject.
miva.jacksonsun.com /miva/cgi-bin/miva?sp_malathion.mv   (318 words)

  
 Malathion, Giuliani, and EPA lies.
"Malathion is part of a chemical class that has been identified by the agency as one of the riskiest classes of chemicals," said Steve Johnson, an EPA pesticide administrator.
Malathion is one of the most frequently used insecticides on earth and chemical companies are among the largest contributors to elected officials in the U.S. The influence of these corporations on the EPA itself is even more extraordinary.
Malathion is sprayed on over 100 different crops according to the EPA report and its residues are to be found in almost every food product we buy.
www.nospray.org /aL_513epa.html   (3337 words)

  
 Malathion
The type of malathion being sprayed over Tampa is not always the type being referred to in health studies by malathion proponents.
Malathion does not appear to produce point mutations in standard gene mutation assays in bacteria, but its metabolite malaoxon (94% pure) was positive in mammalian cell mutation tests.
At least one biologist responsible for collecting water samples and testing for malathion said he believed that levels of the chemical was increasing in local waterways, and might soon pose an acute toxicity threat to fish and other wildlife.
www.safe2use.com /poisons-pesticides/pesticides/malathion/malathion.htm   (1438 words)

  
 Malathion for lice
Malathion lotion must be applied to hair and left on for 8 to 12 hours before rinsing off.
Malathion is not recommended for use by pregnant women, nursing mothers, or children less than 2 years of age.
Malathion is still considered an effective medication for treating head and pubic lice.
www.webmd.com /hw/raising_a_family/hw50876.asp   (455 words)

  
 Malathion news articles   (Site not responding. Last check: 2007-09-16)
Malathion or carbaryl (Sevin) has been effective in controlling box elder bugs outdoors, when they are in their nymph stage.
Malathion spray has been done in the areas from where the cases of encephalitis are cross detected," says PP Mishra, Joint Director of Health.
Malathion, thiodan and acephate are from another older class of chemicals known as an organophosphates.
www.mongabay.com /drugs/drugs/Malathion.html   (7003 words)

  
 Headlice control - unnecessary chemical warfare   (Site not responding. Last check: 2007-09-16)
Malathion is a case in point – many health effects have been noted from malathion and its contaminants or breakdown products(2,7).
However, there is one report of a severe birth defect in a baby born to a mother who had used malathion headlice treatment several times when she was 11 to 12 weeks pregnant(5).
Malathion is extremely toxic to wildlife, capable of killing beneficial insects, snails, birds, fish, amphibians and soil microorganisms.
www.positivehealth.com /permit/Articles/Regular/safron26.htm   (896 words)

  
 NDRC Letter to EPA on Malathion
Malathion has also been used to control parasites of livestock and domestic animals, by spraying in and around livestock barns, dairies, poultry houses, food processing plants, etc. Malathion has widespread use as a ground and aerial spray to control medfly, the fruit fly, and mosquito populations.
Malathion is used as a pediculicide in shampoos to treat head lice on children and adults.
Malathion’s toxicity to insects and humans is triggered when it is metabolized in the body to malaoxon.
www.getipm.com /articles/malathion.htm   (10253 words)

  
 Letter about Ovide Malathion
Malathion is an organophosphate, as stated on Page 16 of the FDA Document on Ovide the Pharmacology/Toxicology Review States: "Malathion is classified as an organophosphorous pesticide and has been used in the United States since 1952."; and further
Malathion, although a weaker cholinesterase inhibitor than some other organophosphates, may be expected to exhibit the same symptoms of cholinesterase depletion after accidental ingestion orally.
The use of malathion in the U.S. since 1952 has been as a pesticide (economic poison) and its use was grand fathered in with the establishment of the EPA as a "registered" economic poison or pesticide.
www.getipm.com /OVIDE/ovide-response.htm   (4821 words)

  
 village voice > news > Mutant Malathion by Erik Baard
While downplaying the potential damage, the EPA recently reported that tests of malathion in New York-area holding tanks found traces of a poisonous neurotoxin called isomalathion—a byproduct created when malathion is exposed to high temperatures.
One of the EPA's top in-house malathion experts, senior toxicologist Dr. Brian Dementi, has spent 10 years arguing from data provided by Cheminova itself and other companies that the pesticide is a probable carcinogen, a position contrary to the largely sanguine reports of his colleagues.
As a result, he was bypassed when new malathion issues arose, and frozen out of meetings until his union intervened.
www.villagevoice.com /issues/0129/baard.shtml   (1890 words)

  
 Malathion Health Research
The doctors felt malathion was also suspect because there was no genetic history of this problem in the mother's or father's family and there was no evidence of drug use by the mother, except for the use of malathion head-lice shampoo during the early pregnancy.
Malathion was found to cause DNA abnormalities at all doses tested in human blood cells.
A single oral dose of the chemical trimethyl-phosphorothioate (a toxic contaminant present in all malathion), at levels of 20 milligrams per kilogram body weight, was found to cause a reduction in lung cells in the bronchiolar epithelium of rat lungs.
www.chem-tox.com /malathion/research   (5749 words)

  
 WILDLIFE DAMAGE FROM MALATHION EXPOSURE
Exposure was to malathion at levels which have previously been found
Photograph of the same area of bluefish gill as seen in the left picture but 24 hours after the fish was placed in a tank containing low levels of malathion (.05 mg/liter).
Researchers state not all fish are this affected by malathion, but bluefish show heightened vulnerability and bluefish are a popular food a game fish.
www.chem-tox.com /malathion/research/fish.htm   (276 words)

  
 Spectrum Laboratories : Chemical Fact Sheet - Cas # 121755
TERRESTRIAL FATE: If malathion is released to soil, it may moderately sorb to the soil.
The major metabolite in soil is malathion beta monoacid.
malathion in dry, moist, waterlogged soils, respectively, were: 33-86%(70%), 15-40%(33%), and
www.speclab.com /compound/c121755.htm   (888 words)

  
 Ovide (malathion) Head Lice Treatment
(malathion) Lotion kills head lice and their nits.
Safety Information: Minor side effects observed in trials of malathion lotion, 0.5%, include a temporary increase in dandruff in those prone to this condition.
Irritation to the skin and scalp is the most common adverse reaction.
www.ovide4headlice.com /index_co.asp?siteID=257   (148 words)

  
 MedlinePlus Medical Encyclopedia: Malathion
Note: Serious poisoning can occur from just handling the malathion without gloves or by failing to wash hands soon after exposure.
Significant amounts are absorbed through the skin unless proper precautions are observed.
If malathion is on skin, wash area thoroughly for at least 15 minutes.
www.nlm.nih.gov /medlineplus/ency/article/002834.htm   (337 words)

  
 Documentation for Immediately Dangerous to Life or Health Concentrations (IDLHs)
The chosen IDLH, therefore, has been estimated from the statement by Stolman [1969] that the acute oral LD values for mice and rats range from 480 to 5,800 mg/kg.
Basis for revised IDLH: The revised IDLH for malathion is 250 mg/m
Study of human exposure during aerosol application of malathion and chlorthion.
www.cdc.gov /niosh/idlh/121755.html   (276 words)

  
 [No title]   (Site not responding. Last check: 2007-09-16)
The distribution of the label within the body tissues was found to be both rapid and extensive.
The highest levels of metabolic transformation were found in the digestive tract and fat body.
The results from this study revealed that the combination of these pesticides altered fundamental pharmacokinetic parameters, which may explain some of the toxicities associated with exposure to these chemicals in combination.
www.gulflink.osd.mil /pesto/pest_refs/n53en543/Malathion.html   (2927 words)

  
 Malathion | Pesticides | US EPA   (Site not responding. Last check: 2007-09-16)
Malathion; Revised Risk Assessments, Notice of Availability, and Solicitation of Risk Reduction Options [September 23, 2005] comments accepted through November 22, 2005 (Docket ID Number: OPP-2004-0348)
Maximum Use Patterns for Malathion on Food Crops (67 KB, PDF)
Evaluation of the Carcinogenic Potential of Malathion (943 KB, PDF)
www.epa.gov /pesticides/op/malathion.htm   (507 words)

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