escherichia coli, colony of bacteria 3d

escherichia coli colony bacteria 3d illustration disease epidemic infection micro microbiology microscopic pathology science virus germs probiotic colon intestinal mucosa life water macro environment aquatic ecoli flora illness microscope background closeup microbes flagella enteric medicine health biology microbe research bacterium microorganism bacterial bacteriology pathogenic pathogen outbreak cell medical probiotics salmonella microorganisms gut