S.pneumoniae was isolated from a spinal fluid sample from an inpatient.An oxacillin disk screening test was performed and the zone of inhibition measured 19 mm.Which action is most appropriate?
A)Call patient's physician and report the isolate as oxacillin-resistant;no further work-up required.
B)Repeat testing to confirm the identification of the isolate and qualitative susceptibility profile.
C)Report the isolate as penicillin-resistant;inform infection control and patient's physician.
D)Do E-test and report quantitative MIC result and interpretive category using meningitis MIC criteria.

Question

Quizplus · Accepted Answer

An oxacillin screening test for penicillin-susceptibility can be done on S.pneumoniae isolates.For zone sizes less than 20 isolates may upon testing by MIC methods found to be susceptible,intermediate,or resistant to penicillin.In this case,the MIC quantitative result (in ug/mL)be reported along with interpretive category specific for meningitis isolates.Nonmeningitis criteria should not be reported.Penicillin resistance is not that unusual and meningitis caused by S.pneumoniae is not thought to be contagious and thus,the other actions in answers a-c are incorrect or not warranted.

Spneumoniae Was Isolated from a Spinal Fluid Sample from an Inpatient.An