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Old 07-12-2011
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Question A 12 year old boy complains of dry cough

A 12 year old boy complains of dry cough, slight fever, and fatigue for the past 2 weeks. He noticed increased chest congestion and coughing yesterday when walking outside in the cold air. He denies nasal congestion,rinorrhea,emesis, or diarrhea. His mother decalres that her son is generally healthy except for a history of allergies in the summer. His vital signs, repsiratory effort and chest examinatio are normal. Which of the following is the most likely pathogen?

A. H. Influenzae
B. M. pneumoniae
C. RSV
D. S. Aureus
E. S. Pneumoniae
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Old 07-12-2011
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Mycoplasma?
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Old 07-12-2011
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Mycoplasma... cold agglutinins!
i would've answered rsv if the patient was younger!
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Old 07-13-2011
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B. M. pneumoniae mc cause in age (5-15 year ) is the answer

E. S. Pneumoniae age 5-15 but need local infltrate in xray


A. H. Influenzae age btw (4m-4year)&
C. RSV (mc cause) in age btw (4m-4year)
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Old 07-13-2011
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B.............
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Old 07-13-2011
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i'd like to go for > C. RSV
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Old 07-13-2011
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The correct answer is B. These findings are consistent with walking pneumoniae. The incubation period is 5-7 days, and most symptoms occur in 2nd or 3 rd week of infection. Hemolysis occurs as antibodies attach to RBCs prompting reticulocyte production. If necessary, nasopharyngeal aspirate for PCR or measurement of cold aglutinins may help aid in the diagnosis. Auscultatory and radiographic findings vary; a normal chest x-ray or one with an interstitial pattern, effusion, or atelectasis could be seen.
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Clinical-Signs, Infectious-Diseases, Pediatrics-, Pulmonology-, Step-2-Questions

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