Survey on Prevalence of Brucella Infection in Sheep and Goats
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Date
2011-06-17
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Karnataka Veterinary, Animal and Fisheries Sciences University , Bidar
Abstract
The present study was carried out in six different farms of sheep and goats i.e., at
Bengaluru, Haniyuru, Allipura, Huduguru, Veerapsandra and Peddaenhalli to survey on
seroprevalence of brucella infection by RBPT and STAT. Preliminary screening of a total
of 148 sheep and 104 goat sera samples in six farms by RBPT revealed 10 (6.7%) sheep
and 7 (7%) goats as reactors. All the RBPT reactors were further subjected to standard
tube agglutination test. All the animals selected in farms at Bengaluru and Haniyuru were
seronegative which could be hypothesized that animals were not exposed to the infectious
agent. So, the seroprevalence recorded were 7%, 14.3%, 3.3% and 2.85% at Allipura,
Huduguru, Veerapsandra and Peddaenhalli respectively which might be due to
endemicity. Identification of endemic areas would be helpful in culling the seropositive
animals and undertaking vaccination program.
In the hematological and biochemical analysis conducted, there was significantly
higher (P<0.05) TLC values and neutrophil count, significantly lower hemoglobin levels,
lymphocyte and monocyte count and no significant variation in PCV of blood samples in
brucella seropositive animals. This might be due to cellular immune response to bacterial
infection and anemia due to brucella’s tropism to reticuloendothelial system. There was
no significant variation (P<0.05) in AST & GGT and albumin: globulin ratio values in
brucella seropositive animals and hence no damage to liver was observed in the present
study conducted.
The present study revealed 15 Km distance between each farm, communal
pasturing and watering, comingling of the animals, open system of rearing and non
utilization of immunization are the risk factors in seropositive farms which declared the
minimal epidemiological unit of intervention.
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P.G.Thesis
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