firmicutes humble nurse mascot with a syringe

assistant bacilli bacillus bacteria bacterial bacteriologic bacteriology bacterium cartoon character clostridiaceae cute doctor emoticon emotion expression firmicutes funny happy health healthy heart illustration imagery infect injection magnification mascot medic medical microbe microbiologic microbiological micrograph microorganism nurse plectridium prokaryote scientific shigella smile surgery syringe technique techniques tetanospasmin tetanus tools transmission vector