rod-d bacteria and cocci

acidophilus aureus bacteria bacterial bifidobacterium biological biology cell citrobacter cocci coccus coli disease ecoli enterobacter escherichia flora health human illustration intestinal intestine klebsiella lactobacillus medical medicine microbe microbiocenosis microbiology microbiome normal normobiocenosis normocenosis overgrowth pathogen pathogenic pneumococcus pneumoniae research rod salmonella science shaped shigella skin spherical staphylococcus streptococcus yersinia