bacillus
bacteria
bacterial cell structure
bacterial infection
bacteriology
beam
capsule
cartoon
cell wall
cells
character
chroococcales
chroococcales bacteria
coccus
cute
cytoplasm
diplococci
emoticon
emotion
expression
funny
grin
grinning
happiness
happy
illustration
infecting humans
intestinal bacteria
joyful
laugh
lyme disease
mascot
microbiology
microorganism
mug
nucleoid dna
pilus
plasma membrane
prokaryotic
shine
smile
smirk
sneer
spirilla
spirillum
spirochetes
virus
zygot