bacilli
bacillus
bacteria
bacteria spirilla
bacterial cell structure
bacterial infection
bacteriology
capsule
cartoon
cell wall
cells
character
coccus
cute
cytoplasm
diplococci
emoticon
emotion
expression
funny
glow
grin
happiness
happy
illustration
infecting humans
intestinal bacteria
laugh
lyme disease
mascot
microbe
microbiology
microorganism
mug
nucleoid dna
pilus
plasma membrane
prokaryotic
shine
simper
smile
smiley
smirk
smirking
spirilla
spirillum
spirochetes
staphylococcu
virus