Cockroaches nyob rau hauv lub tsev - ntsuas thiab qhov chaw ntawm unsanitary tej yam kev mob. Lawv muaj kab mob thiab txawm tom neeg. Nws pom hais tias cab tau noj cov pob zeb ntawm daim tawv nqaij ntawm tib neeg lub cev, thaum nws pw. Pom zoo, tsis yog ib qho kev zoo nkauj heev. Omnivorous parasites noj tsis tsuas yog crumbs, qab zib thiab lwm yam khoom noj khoom haus khib nyiab.