K 39 antigen is used in diagnosis of:
Correct Answer: Kala azar
Description: Rapid Diagnostic Test: Now a rapid dipstick test based on the recombinant K39 protein is available for rapid diagnosis of kala-azar. K39 is an epitope apparently conserved on amastigotes of Leishmania species that cause visceral infection; by use of laboratory ELISA testing, circulating anti-K39, IgG is detectable in 95%- 100% of patients who have kala-azar, irrespective of geographic region. Ref:
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Social & Preventive Medicine
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