adenovirus
aerobe
aerobic bacteria
amoeba
anaerobe
anaerobic bacteria
bacillus
bacteria
bacterium
bug
coccus
disease-producing microorganism
echovirus
enterovirus
filterable virus
fungus
germ
gram-negative bacteria
gram-positive bacteria
microbe
microorganism
mold
nonfilterable virus
pathogen
picornavirus
protozoa
protozoon
reovirus
rhinovirus
rickettsia
spirillum
spirochete
spore
staphylococcus
trypanosome
vibrio
virus
streptococci
eubacteria
eubacterium
true bacteria
Gram-negative
aids-related
catarrhal
clostridium
disease-causing
drug-resistant
helminth
nosocomial
pneumococcal
pseudomonas
pyogenic
salmonella
staphylococcal
streptococcal
caucus
enterococcus
raucous