GoodGirl
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A 5-year old boy has a fever, exudative pharyngitis and cervical lymphadenopathy. His pediatrician suspects that the cause is Strep. pyogenes. Which of the following findings would be most useful for diagnosis an infection caused by this organism?
A- beta hemolysis in blood agar
B- large yellow colony on blood agar
C- No production of catalase
D- susceptibility to bacitracin
E- susceptibility to hypertonic salt
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| new_n_lost
Politically InCorrect
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D- susceptibility to bacitracin
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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."
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| GoodGirl
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| glycogen
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D
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| bactitech
Forum Elite
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We used to use an "A" disc (bacitracin) to ID Group A. Nowadays, in order to be able to incur a charge for identification of this organism, we must use a grouping latex. There are certain rules that must be followed so that we have the proper workup to generate a charge code. Bacitracin only gives a "presumptive" identification; therefore we cannot use it to generate a charge code. Type-specific latex agglutination is the proper ID to generate charges. Reimbursements are everything!
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Clinical Microbiology since 1974
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| Ig F
Forum Elite
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Strep pyogenes is bacitracin sensitive........
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i m not perfect but i wanna get close to it......
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