enterobacterias gram negativas proteobacteria, bacteria such as salmonella, escherichia coli, yersinia pestis

aeruginosa bacillus background bacteria bacterium biological biology clostridium coli disease enterobacter epidemic escherichia experiment fever gramnegative health illness illustration infection klebsiella legionella macro medical medicine micro microbe microbiology microorganisms microscope microscopic mycobacterium organism pathology proteobacteria proteus research salmonella science scientific sepsis serratia shigella sickness tuberculosis yersinia