a brainy student azorhizobium caulinodans cartoon character with pencil and glasses

anthracis azorhizobium bacilli bacillus bacteria bacterial bacterium book cartoon caulinodans character cholera clever cocci collection cute disease education emoticon emotion endospores expression food funny geek gonorrhea graduate happy helicobacter human illustration infection learner mascot meningitis microbe pencil peritonitis salmonella salmonellosis school skill smart smile stationery streptococci student typhi vector