A Staphylococcal Isolate That Gives a Negative Result Using the Cefinase

Multiple Choice

A staphylococcal isolate that gives a negative result using the Cefinase disk and tests resistant to penicillin by disk diffusion means that:

A) the isolate may contain the mecA gene.
B) the bacteria produce the b-lactamase enzyme.
C) the isolate is also resistant to ampicillin,carbenicillin,ticarcillin,and imipenem.
D) the isolate is also resistant to oxacillin,cefoxitin,and ticarcillin-clavulanate.