Animal
Safety
Bt products is found to be safe for use in the
environment and with mammals. The EPA (environmental protection agency)
has not found any human health hazards related to using Bt. In
fact the EPA has found Bt safe enough that it has exempted from
food residue tolerances, groundwater restrictions, endangered species
labeling and special review requirements. Bt is often used near
lakes, rivers and dwellings, and has no known effect on wildlife such
as mammals, birds, and fish.
Humans exposed orally to 1000 mg/day for 3-5 day of Bt
have showed no ill effects. Many tests have been conducted on test animals
using different types of exposures. The results of the tests showed that
the use of Bt causes few if any negative effects. Bt
does not persist in the digestive systems of mammals.
Bt is found to be an eye irritant on test rabbits.
There is very slight irritation from inhalation in test animals which
may be caused by the physical rather than the biological properties of
the Bt formulation tested.
Bt has not been shown to have any chronic toxicity
or any carcinogenic effects. There are also no indication that Bt
causes reproductive effects or birth defects in mammals.
Bt breaks down readily in the environment. Because of this Bt
poses no threat to groundwater. Bt also breaks down under the
ultraviolet (UV) light of the sun.
Even with such widespread use of Bt-based products in the past
50 years, only two incidents of repored allergic reaction have been reported
to the EPA. In the first incident, it was concluded that the exposed individual
was suffering from a previously diagnosed disease. The second involved
a person that had a history of life-threatening food allergies.Upon investigation,
it was found that the formulation of Bt also contained carbohydrate and
preservatives which have been implicated in food allergy.
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