In a case of Kala-azar aldehyde test becomes positive after

In the Kala-azar endemic areas of India, Napier&;s aldehyde test has been used for a long time. The test relies on the jellification caused by the binding of the serum globulins to the formaldehyde About 85 per cent of patients with disease of 3 months or more gives positive reaction.TEXTBOOK OF MEDICAL PARASITOLOGY, BAVEJA,3RD EDITION, PAGE NO 42