Klebsiella Spp

Multiple Choice

Klebsiella spp.were isolated from a sputum sample,and susceptibility testing was performed.The isolates were sensitive to several antibiotics;however,they were resistant to ampicillin.Which one of the following statements explains this discrepancy?

A) The ampicillin disk is most likely expired.
B) Because Klebsiella spp.should be sensitive to ampicillin,a technical error is to blame.
C) Ampicillin inhibits cell wall synthesis.In addition,because Klebsiella spp.do not have a cell wall,they should not have been tested for ampicillin.
D) No discrepancy is present;Klebsiella spp.are normally resistant to ampicillin.