Sero Epidemiological Studies on the Prevalence of Japanese Encephalitis in Pigs in Bihar
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Date
1980
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Birsa Agricultural University, Ranchi
Abstract
The present investigation was conducted to map out the prevalence of Japanese encephalitis in Bihar and to ascertain whether the 1978 outbreak of encephalitis in the state could be attributed to it. In order to map out its prevalence a total of 404 pigs from Darbhanga, Patna, Begusarai, Nawada, Dhanbad, Singhbhum, Hazaribagh and Ranchi districts were studied. These pigs were brought for slaughter at the Bacon factory Kanke. Out of 404 pigs, 374 were White Yorkshire, 14 Crossbred (White Yorkshire x Landrace), 16 Deshi- Black, 258 were female, 146 male, 368 adults and 36 were piglets. Serum samples were collected from each of 404 pigs. These were tested for haemagglutination inhibition and complement fixing antibodies using Japanese encephalitis, Dengue-2, West Nile and Chikungunia virus antigens.
The distribution of pigs showing highest HI antibodies according to sex, age and breed indicated that more females (47.67%) than males (36.98%), more adults (44.65%) than piglets (36.11%), more White Yorkshire pigs (44.11%) than crossbred (42.85) and Deshi Black (37.50%) had exposure to Japanese encepha litis virus. A comparison of exposure rates to different viral antigens suggested that JEV (43.81%) was far more prevalent than DN-2, WN and CHIK viruses (18.06%, 16.33 % and 2.97%) respectively.