Repeated minor exposure to many products, including pesticides, may sensitize some people to react adversely to a family of chemicals. This is called what?

Repeated minor exposure to many products, including pesticides, may sensitize some people to react adversely to a family of chemicals. This is called what?

• A. Hypersensitivity
• B. Acute toxicity
• C. Chronic toxicity
• D. Carcinogenicity

Answer: (A)

Repeated, low-level exposure can prime the immune system so that it reacts against related chemicals. This sensitization leads to hypersensitivity, where future contact with a chemical in the same family can trigger adverse reactions even at small doses. This distinction matters because hypersensitivity is about an immune response to low or repeated exposures, not about immediate harm from a single high dose (acute toxicity), long-term harm from ongoing exposure without an immune component (chronic toxicity), or the potential to cause cancer (carcinogenicity). So the described situation best fits hypersensitivity since the body becomes sensitized to a family of chemicals and reacts upon later exposure to related compounds.

Repeated, low-level exposure can prime the immune system so that it reacts against related chemicals. This sensitization leads to hypersensitivity, where future contact with a chemical in the same family can trigger adverse reactions even at small doses. This distinction matters because hypersensitivity is about an immune response to low or repeated exposures, not about immediate harm from a single high dose (acute toxicity), long-term harm from ongoing exposure without an immune component (chronic toxicity), or the potential to cause cancer (carcinogenicity). So the described situation best fits hypersensitivity since the body becomes sensitized to a family of chemicals and reacts upon later exposure to related compounds.