Question
A 26 year old male presents to a STD clinic with a single painless ulcer on external genitalia. The choice of laboratory test to look for the etiological agent would be ?
| A. |
Scrapping from ulcer for culture on chocolate agar
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| B. |
Scrapping from ulcer for dark field microscopy
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| C. |
Serology for detection of specific IgM antibodies
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| D. |
Scrapping from ulcer for Tissue culture
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Show Answer
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Correct Answer � B
Explanation
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Correct answer : b
The condition described in question is primary syphilis
primary syphilis:
Incubation period : 9-90 days
Presents with a single hard indurated ( button like) painless ulcer with regular edges which oozes serum on pressure.
Chancre redux is a clinical feature of Early Relapsing Syphilis.
IOC : Scrapping from ulcer for Dark field microscopy
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