PATHOLOGY

Detailed explanation-1: -Biological contaminants include bacteria, molds, mildew, viruses, animal dander and cat saliva, house dust, mites, cockroaches, and pollen (see more about asthma triggers).

Detailed explanation-2: -Briefly, biological contamination is when food is contaminated with infectious bacteria (such as Salmonella spp. and L. monocytogenes) or toxin-producing organisms (such as Clostridium botulinum) and viruses (such as norovirus), which are a common cause of food poisoning and food spoilage.

Detailed explanation-3: -Obligate parasites are biotrophs (gr.”bio”, life-“troph”, “nourish, feeder”) which also depend entirely on a living host for its nutrition.