microscopic bacteria float against blue background, highlighting biological exploration and detail

background technology hospital tools disease 3d rendering biology bacteria microbiology microscope fever stomach bacterium microscopic digestion digestive biological diarrhea bacillus intestines system salmonella food poisoning gastroenteritis sem klebsiella aeruginosa ailments biotoxin closeup clostridium coli enterobacter epidemic escherichia borne issues proteobacteria scanning electron microscopy themes unhealthy yersinia