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  • Title: Seropositivity of Visceral leishmaniasis on people of VL endemic three districts of Nepal.
    Author: Basnyat S, Banjara MR, Ghimire P, Matlashewski G, Singh A.
    Journal: Parasitol Int; 2021 Feb; 80():102236. PubMed ID: 33147500.
    Abstract:
    Visceral leishmaniasis (VL) is a life-threatening vector borne disease caused by the Leishmania donovani species complex. In Nepal, it is transmitted to humans by L donovani infected Phlebotomus argentipes sand flies [12]. The pathogenesis of VL is complex, and the clinical presentation ranges from asymptomatic infection to severe and fatal disease. Asymptomatic infection may act as potential reservoirs for sustained transmission of VL in endemic areas. We investigated the sero-prevalence of symptomatic and asymptomatic infection of VL in people of three endemic districts of Nepal by serology targeting family members and neighbors of VL patients. Sero-survey was conducted among 189 people of villages endemic to VL from Palpa, Sarlahi and Saptari districts during 2016 to 2018 using the rK39 rapid diagnostic test (InBios International, Seattle, WA) to detect anti-Leishmania antibodies. Sero-positivity was 35.7% (10/28) in people tested from Sarlahi districts, 6% (3/50) in Saptari district and 1.7% (1/59) from the Palpa district. In Sarlahi, sero-positivity was found to be highest among the age group below 15 years (44.5%). All family members of diagnosed VL cases in Saptari and Palpa districts were found to be rK39 test negative. In Sarlahi district, among the ten sero-positive cases, nine were febrile and became symptomatic VL cases after few days and one case remained asymptomatic during the six month follow up. Asymptomatic cases in VL endemic districts of Nepal were found to be sero-positive, screening of people in VL endemic districts would be important for prevention of VL transmission.
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