allergy
antibiotic
backdrop
bad
biochemistry
biological
biology
closeup
contaminated
danger
disease
education
food
fungal
fungi
fungus
germ
green
growth
health
illness
infected
infection
medical
micro
microbe
microbiology
microscopic
mildew
mold
mould
mycelium
nature
organic
penicillin
petri
proliferation
replication
reproduction
rotten
round
science
scientific
spoiled
spore
spread
structure
texture
unhealthy
unhygienic