bacteria colony under microscope, . laboratory research

acid agent background bacteria bacterial bacteriology bacterium biocontrol biological biology cell closeup colony color control danger design education exam fermentation graphic health helicobacter histology illustration klebsiella laboratory lactic lactobacillus legionella magnification medical micro microbe microbial microbiology microorganism microscope microscopy nanobiology nobody organism research salmonella science scientific sepsis staphylococcus streptococcus view