Host - An organism that harbors a parasite or another organism where there is a symbiotic relationship between the two organisms. In some cases, the relationship is commensal, or mutually beneficial, but in the case of a parasite and host, the host may be hurt by the parasite's presence.⏎
Mucous Membrane - The moist linings of body passages and internal cavities involved with absorption and secretion of substances.⏎
Morbidity - The relative occurrence of a disease or a condition that causes illness.⏎
Infection - The entry, establishment, and replication of pathogens inside a host organism.⏎