Acute toxicity is distinguished from chronic toxicity, which describes the adverse health effects from repeated exposures, often at lower levels, to a substance over a longer time period (months or years). It is widely considered unethical to use humans as test subjects for acute (or chronic) toxicity research. However, some information can be ...
Fish acute toxicity syndrome (FATS) is a set of common chemical and functional responses in fish resulting from a short-term, acute exposure to a lethal concentration of a toxicant, a chemical or material that can produce an unfavorable effect in a living organism.
- Factors influencing toxicity
Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell or an organ such as the liver. By extension, the word may be metaphorically used to describe toxic effects on larger and more complex groups, such as the family unit or society at large. Sometimes the word is more or le
There are generally five types of toxic entities; chemical, biological, physical, radiation and behavioural toxicity: 1. Disease-causing microorganisms and parasites are toxic in a broad sense but are generally called pathogens rather than toxicants. The biological toxicity of pathogens can be difficult to measure because the "threshold dose" may be a single organism. Theoretically one virus, bacterium or worm can reproduce to cause a serious infection. However, in a host with an intact immune s
Toxicity can be measured by its effects on the target. Because individuals typically have different levels of response to the same dose of a toxic substance, a population-level measure of toxicity is often used which relates the probabilities of an outcome for a given individual in a population. One such measure is the LD50. When such data does not exist, estimates are made by comparison to known similar toxic things, or to similar exposures in similar organisms. Then, "safety factors" are added
For substances to be regulated and handled appropriately they must be properly classified and labelled. Classification is determined by approved testing measures or calculations and has determined cut-off levels set by governments and scientists. Pesticides provide the example of well-established toxicity class systems and toxicity labels. While currently many countries have different regulations regarding the types of tests, numbers of tests and cut-off levels, the implementation of the Globall
Toxicity of a substance can be affected by many different factors, such as the pathway of administration, the time of exposure, the number of exposures, the physical form of the toxicant, the genetic makeup of an individual, an individual's overall health, and many others. Several of the terms used to describe these factors have been included here. 1. Acute exposure A single exposure to a toxic substance which may result in severe biological harm or death; acute exposures are usually characteriz
"Toxic" and similar words derive from Greek τοξον toxon, a reference to the use of poisoned arrows as weapons. This root was chosen because the transliteration of 'ιον ion, the usual Classical Greek word for "poison", was not distinctive enough from the English word "ion," itself derived from a similar but unrelated Greek root. The literal meaning of the root toxo- is reflected in such biological names as Toxodon.
Acute toxicity. Acute toxicity describes the bad effects of a substance that come either from a single exposure, or from many exposures in a short amount of time (usually less than 24 hours). To be known as acute toxicity, the bad effects should happen within 14 days of the substance thouching something.
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Acute, a leaf shape in the glossary of leaf morphology. Acute (medicine), a disease that it is of short duration and of recent onset. Acute toxicity, the adverse effects of a substance from a single exposure or in a short period of time.
Alcohol intoxication, also known as alcohol poisoning, commonly described as drunkenness or inebriation, is the negative behavior and physical effects caused by a recent consumption of alcohol.   In addition to the toxicity of ethanol , the main psychoactive component of alcoholic beverages , other physiological symptoms may arise from ...