Asymptomatic infection with visceral leishmaniasis in a disease-endemic area in bihar, India.
A prospective study was carried out in a cohort of 355 persons in a leishmaniasis-endemic village of the Patna District in Bihar, India, to determine the prevalence of asymptomatic persons and rate of progression to symptomatic visceral leishmaniasis (VL) cases. At baseline screening, 50 persons were positive for leishmaniasis by any of the three tests (rK39 strip test, direct agglutination test, and polymerase chain reaction) used. Point prevalence of asymptomatic VL was 110 per 1,000 persons and the rate of progression to symptomatic cases was 17.85 per 1,000 person-months. The incidence rate ratio of progression to symptomatic case was 3.36 (95% confidence interval [CI] = 0.75-15.01, P = 0.09) among case-contacts of VL compared with neighbors. High prevalence of asymptomatic persons and clinical VL cases and high density of Phlebotomus argentipes sand flies can lead to transmission of VL in VL-endemic areas.
Topno
Roshan K
RK
Rajendra Memorial Research Institute of Medical Science, Agamkuan Patna, Bihar, India. roshanktopno@yahoo.co.in
Das
Vidya N R
VN
Ranjan
Alok
A
Pandey
Krishna
K
Singh
Dharmender
D
Kumar
Nawin
N
Siddiqui
Niyamat A
NA
Singh
Vijay P
VP
Kesari
Shreekant
S
Kumar
Narendra
N
Bimal
Sanjeev
S
Kumar
Annadurai Jeya
AJ
Meena
Chetram
C
Kumar
Ranjeet
R
Das
Pradeep
P
D015331:Cohort Studies; D019353:Endemic Diseases; D006801:Humans; D015994:Incidence; D007194:India / Q000453:epidemiology; D007898:Leishmaniasis, Visceral / Q000175:diagnosis / Q000453:epidemiology*; D016133:Polymerase Chain Reaction
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