acaricide
adenovirus
aerial infection
aerobe
aerobic bacteria
aerobic organism
airborne infection
amoeba
anaerobe
anaerobic bacteria
anaerobic organism
anthelmintic
antibiotic
antiseptic
autotrophic organism
bacillus
bacteria
bacterium
bane
being
bug
bug bomb
carbamate insecticide
carrier
chemosterilant
chlorinated hydrocarbon insecticide
coccus
communicability
contact poison
contagion
contagiousness
contamination
corruption
creature
cryptogenic infection
defoliant
direct infection
disease-producing microorganism
disinfectant
droplet infection
dust infection
echovirus
enterovirus
epidemiology
eradicant
filterable virus
fumigant
fungicide
fungus
genetic individual
agency
delegacy
malevolent program
representation
DNA virus
RNA virus
viroid
Gene
cancer
cell
chemical
disease
drug
epidemic
fever
germ
infection
influenza
insect
microbe
parasite
plague
poison
protein
toxin
tuberculosis
vaccine
Cyrus
Iris
cytomegalovirus
desirous
iris
retrovirus