purple bacterias. micro biology hand lettering.

bacilli bacillus bacteria bacterial bacterium banner biology border bug calligraphy cell cocci contaminants diplococci disease dish epidemic epidemiology flat flu germ germs hand horizontal hygiene illness infection inflammatory lettering micro microbe microbiology microorganism microscopic mold monococci organism ornament palisades pathogen petri phrase quote research rods science script set sickness spirilla spore staphylococci streptobacilli streptococci text type typography vector vibrio words