medical laboratory testing for intestinal infection, e.coli bacterial infection in petri dish

alpha analysis aureus bacilli bacteria bacterial beta biohazard biology bug candida cocci coli colony control culture danger diagnostic disease dish ecoli escherichia gram growth hand health healthcare hemolysis hold horizontal infection intestinal lab laboratory medical microbe microorganism microscope negative outbreak overgrowth petri plate positive prevention research sample staphylococcus stomach test testing yeast