Nuisance pests are organisms that invade human environments, causing discomfort, annoyance, or potential health risks. Unlike pests that cause direct damage to crops or structures, nuisance pests primarily affect the quality of life. These pests include insects like mosquitoes, flies, bedbugs, and rodents such as mice and rats. Understanding their role in toxicology is crucial because of their potential to carry diseases and their impact on human health.