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Dental
A 24-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 –
Scrappings from ulcer for culture on chocolate agar with antibiotic supplement
Serology from detection of specific IgM antibodies
Scrappings from ulcer for dark field microscopy
Scrappings from ulcer for tissue culture
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