bacteria staphylococcus aureus, 3d

mrsa microscopic diarrhea microbes spherical toxin microorganisms pus sepsis purulent cocci staphylococci sick bacteriemia epidemic closeup pyogenic superbug factor pathology macro cells surgical staphylococcus 3d illustration shapes biology microscope bacteria fever medical scientific microbiology sickness medicine science disease infection human colony colonies hemolysis hemolytic sheep blood agar medium