Penicillin resistance in Staphylococcus. Petri dish cultures of two strains of Staphylococcus aureus bacteria, comparing the action of a penicillin an
Penicillin resistance in Staphylococcus. Petri dish cultures of two strains of Staphylococcus aureus bacteria, comparing the action of a penicillin antibiotic. Bacterial growth appears opaque and grey on the surface of the growth medium. A white pellet of penicillin drug is seen in the centre of each dish. At left, one bacterial strain shows sensitivity to the penicillin drug by forming a clear zone of inhibited growth around the pellet. At right, a second strain of bacteria shows resistance to the penicillin and its growth is not inhibited by the drug pellet. Staphylo- coccus aureus is a bacteria which causes boils, abscesses, and urinary tract infections in humans.
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Photo credit: © JOHN DURHAM/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: antibiotic, aureus, bacterial, drug, equipment, healthcare, laboratory, medical, medicine, micro-organism, microbiological, microbiology, penicillin, reaction, research, resistance, sensitivity, staphy., staphylococcus, test
