3d
bacillus
bacteria
bacterial
bacterium
bifidobacteria
bifidobacterium
biology
cell
closeup
clostridium
coli
disease
epidemic
germs
gram
health
illness
illustration
infection
klebsiella
lactic
lactobacillus
medicine
microbes
microbiology
microscope
microscopic
microworld
mycobacterium
organism
pestis
proteus
rods
rodshaped
salmonella
science
scientific
shigella
sick
tuberculosis
yersinia
yoghurt
yogurt