next step after seeing erythema migrans..ans is not ELISA :-( - USMLE Forums
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Old 06-25-2012
tyagee's Avatar
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Default next step after seeing erythema migrans..ans is not ELISA :-(

A 12-year-old boy presents to the pediatrician complaining of generalized body aches, mild headache, dizziness and some minor joint pains for the past 3 days. On examination, his temperature was 38C (101.4F), pulse 80 and regular, and blood pressure 110/80. His cardiac, lung and nervous system exam was normal. There was no organomegaly or lymphadenopathy present. There was an annular, erythematous, well-defined patch with raised margins and a central clearing on his right scapula. The pediatrician suspected Erythema migrans and possible early localized Lyme disease. Based on this information, which of the following is the next best step in diagnosis?

A. Biospy of skin lesion
B. Enzyme-linked immunosorbent assay (ELISA) with immunofluoresence assay (IFA)
C. Lyme antigen in urine
D. PCR for B burgdorferi DNA
E. Western blot

guys, ans is not B ! dont have good expln...
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Old 06-25-2012
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Mmmm i know there is and antigen positive for lyme disease in the urine... Maybe C?
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Old 06-25-2012
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MTBCK and MTB3 does not distinguish between Western blot over PCR


FA-CK and Kaplan Ped says Western Blot



as well as UTD 19.3
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The above post was thanked by:
rocketprinciple (06-26-2012), tyagee (06-26-2012)



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