group of bacteria such as escherichia coli, helicobacter pylori or salmonella 3d rendering . microbiology, medical,

bacillus background bacteria bacterial bacteriology bacterium biology blue cell coli concepts digestive disease escherichia flagellum flora gamma germ group health helicobacter horizontal illustration infection intestinal legionella medical medicine microbe microbiology microbiome microbiota microscope microscopic prokaryote pylori render rendering research salmonella science scientific sick such system