The discovery of these newly identified locations for methylmercury
production builds on previous work in which scientists from the Department of Energy s Oak Ridge National Laboratory reported on two genes in bacteria that convert inorganic mercury into the organic form.
The tragic consequences of industrial release of methylmercury
into Minamata Bay off Japan between 1932 and 1968 and the illegal dumping of inorganic mercury into the waters at Grassy Narrows, Ontario, Canada in 1970 demonstrated in horrific terms the effects of methylmercury
on human health: defects in fetuses and neurological disruption in children and adults that, in severe cases, led to madness, paralysis and death.
Toxicity of ethylmercury (and Thimerosal): a comparison with methylmercury
For example, following FDA's advice about tuna consumption will result in increased maternal exposure to methylmercury
, putting babies at risk.
is commonly found in fish, both freshwater and saltwater.
This study investigated how methylmercury
effects Daphnia pulex in the presence of predatory stress chemical.
The study showed the fish in warmer waters ate more but grew less and had higher methylmercury
levels in their tissues, suggesting increases in their metabolic rate caused the increased uptake of the toxic metal.
Fish and shellfish are the main sources of methylmercury
exposure to humans.
When forests are exposed to mercury, the conversion to methylmercury
takes place in the soil and leaves.
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 kind of mercury that accumulates to toxic levels in fish is called monomethylmercury, or simply methylmercury
, because it has a methyl group, C[H.
A study conducted in West Bengal by NGOs, Toxics Link and DISHA, found that the level of methylmercury
( the more poisonous form of the substance) in fish from the state is way higher than permissible levels.