methylmercury


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di·meth·yl·mer·cu·ry

(dī-meth'il-mĕr'kyū-rē),
A contaminant of seafood products synthesized in sediments from mercury and mercury-containing chemicals dumped in waters supporting marine life. Methylmercury is concentrated in aquatic life forms and can thus be deposited in fish intended for human consumption. Probable cause of Minamata disease, a teratogenic condition characterized by multiple birth defects in Japan. An inorganic reagent.
See also: Minamata disease.
Synonym(s): methylmercury

methylmercury

An inorganic mercury industrial pollutant. It is concentrated up the food chain, is teratogenic, and causes severe CNS defects in children whose mothers consumed methylmercury-contaminated seafood while pregnant.

methylmercury

Dimethyl mercury Toxicology An inorganic mercury industrial pollutant; it is concentrated up the food chain, teratogenic and causes severe CNS defects in children whose mothers consumed MM-contaminated seafood while pregnant. See Mercury, Minamata disease.

methylmercury

, methyl mercury (me-thil-mer'ku-re)
An organic mercury compound produced from inorganic mercury by the addition of a methyl group (CH3) by marine and soil bacteria. This compound is readily taken up by plankton, which are then consumed by marine invertebrates, and subsequently by marine predators, in which it concentrates. Finally, it can enter the human body when people eat fish having high concentrations of the compound, such as salmon or halibut (among others). It can also be absorbed into the body through the skin and respiratory tract. Methylmercury is neurotoxic to humans, esp. children. See: mercury poisoningMinamata disease
References in periodicals archive ?
Methylmercury intoxication activates nitric oxide synthase in chick retinal cell culture.
Methylmercury in fish and seafood is easily absorbed on its journey along the digestive tract.
Since thimerosal contains a small amount of methylmercury, but did not cause a significant difference at the six month GDS test, no significance was attributed to the vaccination containing thimerosal.
Methylmercury accumulates in the body; it doesn't pass through and go away.
Based upon the vulnerability of the developing nervous system, overconsumption of fish with elevated levels of methylmercury is a particular public health concern for pregnant women and women of childbearing age.
Researchers at Harvard University in Boston looked for traces of methylmercury in feathers from the bird stored in two US museum collections between 1880 and 2002.
The problem is that we don't know where methylmercury comes from.
The Prevention of Food Adulteration Act pegs the tolerable level of methylmercury concentrates in fish at .25 parts per million.
The fact that methylmercury is a developmental neurotoxin has been established.
Mercury is toxic even at low concentrations, particularly the organic form, methylmercury. Oosthuizen et al.
Exposure to methylmercury (MeHg) from fish and marine mammal consumption continues to present a public health concern in Canada and elsewhere.
Researchers have long known that wetlands are particularly conducive to conversion of inorganic mercury to methylmercury, the form of mercury that most easily accumulates in organisms.