pathogen (n.)
- adenovirus
- aerobe
- amoeba
- anaerobe
- bacillus
- bacteria
- bacterium
- bug
- coccus
- echovirus
- enterovirus
- fungus
- germ
- microbe
- microorganism
- mold
- picornavirus
- protozoa
- protozoon
- reovirus
- rhinovirus
- rickettsia
- spirillum
- spirochete
- spore
- staphylococcus
- streptococcus
- vibrio
- virus
