Posted: June 21st, 2017
At laboratory rounds, the s upervisor shows you the following susceptibility results by mi crobroth dilution of a Streptococcus mitis isolate from a patient with endocarditis: penicillin resistant, erythromycin resistant, and vancom ycin susceptible. The physician telephones asking for the susceptibility results, including susceptibility to clindamycin. What should you tell the physician
At laboratory rounds, the s
upervisor shows you the following
susceptibility results by mi
crobroth dilution of a
Streptococcus mitis
isolate from a patient with endocarditis: penicillin resistant,
erythromycin resistant, and vancom
ycin susceptible. The physician
telephones asking for the susceptibility results, including
susceptibility to clindamycin. What
should you tell the physician?
A. None of the susceptibility results are ready to be reported until
confirmed by a second antimicr
obial susceptibility test (AST)
method, but viridans group streptococci remain predictably
susceptible to clindamycin.
B. Report the current results,
and advise him that viridans group
streptococci remain predictably susceptible to clindamycin.
C. Report the current results, and
advise him that in viridans group
streptococci, resistance to eryt
hromycin predicts resistance to
clindamycin.
D. Report the current results, and
tell him the laboratory will also
test the isolate for susc
eptibility to clindamycin.
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