ETIOPATHOLOGICAL STUDY OF COLISEPTICEMIA WITH COINFECTION OF LOW PATHOGENIC AVIAN INFLUENZA AND MYCOPLASMA IN BROILERS
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Date
2020
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Department of Veterinary Pathology College of Veterinary Science and Animal Husbandry Anand Agricultural University Anand
Abstract
The present study was carried out to know the mortality pattern, gross and microscopic lesions of the colisepticemia in broiler chicken along with molecular detection of LPAI and avian mycoplasma in colisepticemia affected flocks. The study comprised of farm wise and age wise outbreaks due to Escherichia coli infection, gross and histopathological lesions of different organs, isolation, identification, biochemical characterization, antibiogram profile and molecular detection of virulence associated genes of Escherichia coli. Further, molecular detection of LPAI (H9N2) by RT-PCR and avian mycoplasma (Mycoplasma gallisepticum and Mycoplasma synoviae) by PCR in broilers affected with colisepticemia.
Studies on the farm wise and age wise outbreak of colisepticemia among thirty broiler farms having total population of 1,71,317 birds of second to fifth week of age showed an average mortality of 1.89 per cent ranging between 0.32 and 6.75 per cent. The age wise outbreaks of colisepticemia revealed mortality 1.65, 1.97, 2.21 and 1.71 per cent during second, third, fourth and fifth week of age respectively. The outbreaks were higher in number during third, fourth and fifth weeks being the susceptible age for colisepticemia.