This experiment suggests that the exposure during development to the two toxicants produced a state of masked toxicity that was revealed after adult re-exposure.
This is a typical scenario of the current state of representing toxicity data.
We therefore conclude that our data strongly suggests that these GM maize varieties induce a state of hepatorenal toxicity....These substances have never before been an integral part of the human or animal diet and therefore their health consequences for those who consume them, especially over long time periods are currently unknown".
Although the greatest loss of nigrostriatal dopaminergic cells was seen after combined treatment, there was significant loss with all treatments after rechallenge when adult, suggesting that a state of silent toxicity had been unmasked upon adult rechallenge.
Each barrel of industrial sewage is accompanied by a document that states the level of toxicity of the substances.
The reason for this gap is that the current state-of-the-art in toxicity testing consists of protocols in laboratory animals that are time and labor intensive.
Protection of American children, and particularly of inner-city children, against the developmental hazards of pesticides requires a comprehensive strategy that monitors patterns of pesticide use on a continuing basis, assesses children's actual exposures to pesticides, uses state-of-the-art developmental toxicity testing, and establishes societal targets for reduction of pesticide use.
A recent state-of-the-art report on mixture toxicity summarizes the scientific background of mixture toxicity concepts as well as the implications of existing approaches for a predictive mixture toxicity assessment in the regulation of chemicals [13].
The HMM contained 3 states modelled on levels of toxicity (no/low, moderate and severe) and 5 severity levels (none, minimal, mild, moderate and marked) of centrilobular necrosis observed in rat livers exposed to acetaminophen.
It is also noteworthy that the National Toxicology Program's (NTP) specifications for the conduct of toxicity studies state that it is desirable for their study directors to be certified by the ABT (NTP 2011).
