scientist transfer sample using syringe, most probable number mpn technique for counting the coliform bacteria cultured.

agar analysis aseptic autoclave background bacteria biology biotechnology broth care cells chemical chemist chemistry closeup coliform colonies colony count counter counting culture cultured disease dish equipment experiment fungi growth hand health healthy inflection lab laboratory lauryl liquid media medical microbiology most mpn number petri probable research researcher safety sample science scientific scientist selective solution syringe technique technology test testtube transfer tryptose tube using yellow