happy face of salmonella enterica in black graduation hat for the ceremony

alumnus bacillus bacteria bacterial bacteriology bacterium biological biology cartoon cell character cute division education emoticon emotion enterobacteria enterobacterium enterotoxins expire expression finish flagellum funny graduate graduation happy illustration mascot medicine microbe microbial microbiological microbiology microorganism pathogen pathogenic pathological pathology poisoning salmonella salmonellosis smart smile student transmission vector