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Serological evidence of West Nile virus infection in wild migratory and resident water birds in Eastern and Northern India

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Title Serological evidence of West Nile virus infection in wild migratory and resident water birds in Eastern and Northern India
Not Available
 
Creator Mishra, N.
Kalaiyarasu, S.
Nagarajan, S.
Subba Rao, M. V.
George, A.
Sridevi, R.
Behera, S.P.
Dubey, S.C.
McCracken, T.
Newman, S.H.
 
Subject West Nile virus
Flavivirus
Japanese encephalitis virus
Wild birds
Migratory birds
Resident birds
WNV neutralizing antibodies
 
Description Not Available
To assess West Nile virus (WNV) infection in wild resident and migratory birds, we tested 3887 samples from 1784 birds belonging to 119 identified species within 30 families collected during 2008-10 from 13 states in India. The serum samples were tested for WNV antibodies initially by a competition ELISA and subsequently by a micro-plaque reduction neutralization test (Micro-PRNT), whereas tracheal and cloacal swabs were subjected to real-time RT-PCR for the detection of the WNV RNA. Twenty six birds (2.46%) out of 1058 tested showed evidence of flavivirus antibodies by ELISA. End point neutralization antibody determinations for WNV and Japanese encephalitis virus (JEV) showed that of the 22 ELISA positive sera, WNV-specific neutralizing antibodies were detected in 17 samples representing nine species of wild birds (residents: Purple swamphen, Little cormorant, Little egret, Black ibis and Spot-billed duck; residents with winter influx: Common coot and Mallard; migratory birds: Ruff and Purple heron), and two samples were positive for both WNV and JEV antibodies. The WNV-specific antibodies were most commonly detected in Mallards and Common coots. WNV genomic RNA was not detected by real-time RT-PCR. The results in this study suggest that wild resident birds are infected occasionally and wild migratory birds rarely with WNV. Additionally, our study provides evidence of WNV infection in eastern and northern India for the first time.
Not Available
 
Date 2018-03-22T07:24:02Z
2018-03-22T07:24:02Z
2012-12-01
 
Type Research Paper
 
Identifier Mishra, N., Kalaiyarasu, S., Nagarajan, S., Subba Rao, M. V., George, A., Sridevi, R., Behera, S.P., Dubey, S.C., McCracken, T., Newman, S.H. 2012. Serological evidence of West Nile virus infection in wild migratory and resident water birds in Eastern and Northern India.Comp Immunol Microbiol Infect Dis. 2012 Dec;35(6):591-8
0147-9571
http://krishi.icar.gov.in/jspui/handle/123456789/5955
 
Language English
 
Relation Not Available;
 
Publisher EMPRES Wildlife Unit