hand was holding forcep for tong the filter paper onto the prepared petri dish.

ability agar antibiotic background bacteria bacterium beauty biology biotechnology care clean closeup coli color ctinomyce culture cup diffusion disc disease dishes doctor drink drug equipment filter finance finger flora glass growth hand hands health holding hospital hygiene inhibit isolated lab laboratory manicure microorganisms nails paper petri prepared saeruginosa spa table techniques tests tongs wash washing water wedding white woman