agent
aids
animal
bacillus
bacteria
bacterium
biological
biology
body
cancer
causative
cell
cellular
coli
colibacillus
colitis
decay
deep
defocussed
gastritis
gastroenteritis
germs
health
healthy
human
illness
illustration
infection
lifestyle
magnification
medical
medicine
meningitis
microbe
microcosmos
microscopic
neonatal meningitis
objects
organism
parasite
parasitic
pathogen
peritonitis
salmonella
science
sepsis
subtilis
urogenital infection
virus