Qualified Applicator License (QAL) Category K - Health Related Practice Exam 2026 - Free Qualified Applicator License Practice Questions and Study Guide

Rat fleas and mites pose a potential threat to human health primarily because they carry disease organisms that can infect people. These pests are known vectors for various diseases, meaning that they can transmit pathogens from one host to another. For example, rat fleas are notorious for spreading the bubonic plague and other infectious diseases. By feeding on infected animals and then biting humans, they can facilitate the transfer of harmful bacteria or viruses, leading to outbreaks and other health concerns.

While factors such as rapid multiplication and resistance to pesticides can also contribute to the challenges in controlling these pests, the direct connection to human health primarily lies in their role as disease carriers. Understanding this aspect highlights the importance of pest management strategies focused not just on elimination but also on preventing the spread of diseases associated with these pests.