Exp 5 antibiotics

Question 1

ß-lactam antibiotics

Answer 1

cephalosporin
amoxicillin
ampicillin
penicillin

Question 2

What is the mode of action of beta-lactam antibiotics?

Answer 2

Beta-lactam antibiotics bind to the peptidoglycan and blocks cell-wall synthesis

Question 3

Beta-lactamase is:

Answer 3

an enzyme that some bacteria produce that renders them resistant to beta-lactam antibiotics

Question 4

Beta-lactam antibiotics are characterized by their ring structure. A lactic ring has…

Answer 4

1 nitrogen and 3 carbon

Question 5

what is the bacteria used for the test?

Answer 5

Bacillus stearothermophilus

Question 6

Names of tests

Answer 6

disc assay, Delvo-P.BSDA from Charm

Question 7

DelvoP

Answer 7

If a β-lactam antibiotic is not present the media changes from purple to yellow, indicating growth of the organism by acid production. If an antibiotic is present, no growth of B. stearothermophilus will occur and the medium will remain purple.