Significance of interactions between Escherichia coli and respiratory pathogens in layer hen flocks suffering from colibacillosis-associated mortality

Avian Pathology : Journal of the W.V.P.A
D VandekerchoveF Pasmans

Abstract

This study aimed to examine the significance of interactions between Escherichia coli and various respiratory pathogens during outbreaks of colibacillosis-associated mortality in layer hen flocks under field conditions. For this purpose, a case-control study involving 20 control flocks with baseline mortality and 20 flocks with increased mortality due to E. coli septicaemia and polyserositis, was conducted. In each colibacillosis flock, blood samples were taken from 20 hens at the onset of clinical disease and three times thereafter at 2-week intervals. Control flocks of comparable ages were sampled in the same way. Pooled sera, taken at the first and last sampling, were examined for antibody titres against infectious bronchitis virus (IBV) and Newcastle disease virus (NDV), and the individual sera from all four samplings were examined for the presence and/or titres of antibodies against avian pneumovirus (APV), Mycoplasma gallisepticum, Mycoplasma synoviae and Ornithobacterium rhinotracheale. Titre increases were seen for IBV D274 (one control flock) and O. rhinotracheale (one control and one colibacillosis flock). An increase in per cent reactors was seen for APV (one control flock), and for M. synoviae (one control and two c...Continue Reading

References

Feb 1, 1997·Journal of Clinical Microbiology·P van EmpelP Storm
Jun 30, 2004·Avian Pathology : Journal of the W.V.P.A·D VandekerchoveF Pasmans
Jul 28, 2004·Avian Pathology : Journal of the W.V.P.A·D VandekerchoveF Pasmans

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Citations

Jul 28, 2004·Avian Pathology : Journal of the W.V.P.A·D VandekerchoveF Pasmans
Apr 6, 2006·Avian Pathology : Journal of the W.V.P.A·B AskJ A Stegeman
Nov 24, 2011·Avian Pathology : Journal of the W.V.P.A·R H OlsenM Bisgaard
Apr 16, 2013·Avian Pathology : Journal of the W.V.P.A·W J M LandmanJ H H van Eck
Feb 15, 2011·Avian Diseases·N M StokholmJ P Christensen
Jan 27, 2015·Avian Diseases·R HaesendonckA Martel
Mar 25, 2008·Veterinary Immunology and Immunopathology·Mark P AriaansLonneke Vervelde
Apr 17, 2012·Journal of the Science of Food and Agriculture·Gee Leng LauYin Wan Ho
Jun 18, 2015·Avian Pathology : Journal of the W.V.P.A·W J M Landman, J H H van Eck
Jan 9, 2014·Avian Pathology : Journal of the W.V.P.A·Wil J M Landman
Feb 14, 2007·Veterinary Research·Dave Cavanagh
Jul 18, 2020·Avian Pathology : Journal of the W.V.P.A·Grayson K WalkerLuke B Borst
Sep 30, 2020·Pathogens·Shahnas M NajimudeenMohamed Faizal Abdul-Careem
Sep 24, 2018·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Liwen XuShengwang Liu
Aug 6, 2021·Avian Pathology : Journal of the W.V.P.A·W J M LandmanJ H H van Eck
Sep 19, 2009·Poultry Science·D CaveroR Preisinger

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Methods Mentioned

BETA
enzyme-linked immunosorbent assay
ELISA

Software Mentioned

SAS
Statistix

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