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a 67 y/o woman in a skilled nursing facility develops flulike symptoms. several days later, she develops high fever, dyspnea, productive cough, and mental status changes. An xray of the chest shows a cavitary lesion in her left lung. Examination of a sputum sample will most likely show which of the following?
a. gram negative, oxidase negative bacilli
b. gram positive, catalase negative, alpha hemolytic diplococci
c. gram positive, catalase positive, coagulase positive coccus
d. a silver staining cyst
c. a yeast that forms psuedohypae
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c
she initially had influenza, or a viral illness, and now developed secondary staph pneumonia
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BBB. strep pneumo..
Pt older than 65 are particullary prone to develop secondary bacterial pneumonia after influenza infection...
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ya but staph aureus will be the one
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answer is C. she has a pulmonary abscess. Staph Aureus is the most likely cause of bacterial pneumonia complicated by abscess formation. The bacteria causing pneumonia develops in the context of influenza includes s. aureus, h. influenza, and s. pneumonia. Of all of these, s. aureus is the most destructive to lung tissue and causes caviations. S pneumonia causes a necrotizing abcessing pneumonia similiar to s. aureus but it rarely causes cavitary lesions.
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no problem...got from kaplan qbank
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Great question.I wld've gone for 'B'.
So "cavitation" in L lung is the catch.
