Final answer:
Dust mites can cause allergic reactions, including asthma and possibly eczema, through proteins found in their feces. They are common in homes, and complete removal is not feasible.
Step-by-step explanation:
Among the statements about dust mites, the one that is true is that dust mites can cause allergic reactions. This is because their feces contain proteins that can trigger asthma attacks and other allergic responses such as eczema in sensitive individuals. Despite thorough cleaning, it is impossible to completely eliminate dust mites from a home as they thrive on organic debris like human skin flakes.
While they can be found in AC ducts and other areas of a home, they do not feed on people, and there is no specific pesticide that can completely eradicate them. Hypersensitivity pneumonitis, mentioned in relation to occupational exposure to allergens like dust and mold, is considered an occupational disease because it occurs due to repeated exposure to high levels of allergens in certain work environments.