Kirby-Bauer Test time-lapse with E . coli and S. aureus скачать в хорошем качестве

Kirby-Bauer Test time-lapse with E . coli and S. aureus

A time-lapse of the Kirby-bauer test done with E. coli and S. aureus. The Kirby-Bauer test uses Mueller-Hinton agar to test a bacterium's susceptibility to antibiotics by using discs that have antibiotics in it. Antibiotics can work in one of two ways: they either slow down growth (bacteriostatic) or kill the bacteria (Bactericidal). A lot of antibiotics target the thick peptidoglycan layer of the cell wall in gram positive organisms, which makes gram negative bacteria more resistant to these antibiotics. If the bacteria is susceptible to the antibiotic, it will create a zone of inhibition which is the area around the antibiotic disc where the bacteria did not grow. A larger zone indicates greater susceptibility. Cultures were grown at approximately 37 degrees Celsius.