Chemoprophylaxis was carried out on high risk group of extended contacts of new leprosy cases in Nyaungdon Township, Ayeyarwaddy Division, Myanmar and serological response was followed up for two years. In September 2003, blood samples were collected from 829 contacts after getting informed consent and sera were tested for immunoglobulin M antibodies using NTP-BSA ELISA test. These 300 seropositives were randomized to treated and non-treated groups. In each group 102 each were enrolled in adults and 48 each i…
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