Comparison of the Management Characteristics of Sero-positive and Negative Chickens Against Avian Pneumovirus in Uruguay
DOI:
https://doi.org/10.3923/ijps.2010.386.389Keywords:
Logistic regression analysis, poultry farming operations, South AmericaAbstract
The objective of this study was to investigate the risk factors, especially for management characteristics associated with the seropositivity of avian pneumovirus in broiler chickens Uruguay. Seventeen farms of broiler chickens (35 days of age) were studied from October 2008 to April 2009, comprised data collection through questionnaire interviews for each study farm, in combination with blood sample collections for each chicken (n = 1861). Sera were analyzed using a commercial enzyme-linked immunosorbent assay. Univariate and multivariate analyses were used to describe the differences between the two chicken groups categorized according to seropositivity. Percentages of test positive were highly variable between the study farms (0-81%) on the basis of different sample sizes (30-224). The final multivariate logistic regression model indicated that five different study farms were less likely to have seropositive-chickens against avian pneumovirus compared with the reference farm (81% of test positive). Chickens introduced from the two unique hatcheries were less likely to be seropositive in comparison with chickens with no hatchery information.
References
Cook, J.K.A., 2000. Avian pneumovirus infections of turkeys and chickens. Vet. J., 160: 118-125.
Cook, J.K.A. and D. Cavanagh, 2002. Detection and differentiation of avian pneumoviruses (metapneumoviruses). Avian Pathol., 31: 117-132.
Cook, J.K.A., C.A. Dolby, D.J. Southee and A.P.A. Mockett, 1988. Demonstration of antibodies to turkey rhinotracheitis virus in serum from commercially reared flocks of chickens. Avian Pathol., 17: 403-410.
Giossa, G., K. Suzuki, M. Petruccelli, G. Rodriguez, G. Trenchi and H. Trenchi, 2010. Flock-level seroprevalence against avian pneumovirus amongst Uruguayan broiler chickens. Int. J. Poult. Sci., 9: 217-220.
Katz, M.H., 1999. Multivariable Analysis: A Practical Guide for Clinicians. Cambridge University Press, Cambridge, ISBN-13: 978-0521596930, pp: 208.
Ministerio de Ganaderia Agricultura Pesca, 2009. Division contralor de semovientes (DI.CO.SE.). Montevideo. http://www.mgap.gub.uy/dgsg/DICOSE/dicose.htm
Bland, M., 2000. An Introduction to Medical Statistics. 3rd Edn., Oxford University Press, Oxford.
FAO., 2009. FAOSTAT. Food and Agriculture Organization of the United Nations, Rome, Italy. http://faostat.fao.org/default.aspx.
Gough, R.E., 2005. Poultry: Avian Pneumovirus. In: The Merck Veterinary Manual, Kahn, C.M. (Ed.). 9th Edn., Merck and Co., Whitehouse Station, pp: 2299-2300.
Hintze, J., 2008. PASS 2008 Software. NCSS, Kaysville, UT, USA.
IDEXX, 2006. Monitoring Mycoplasmas in poultry farms. Animal Health Updates.
Noordhuizen, J.P.T.M., K. Frankena, M.V. Thrusfield and E.A.M. Graat, 2001. Application of Quantitative Methods in Veterinary Epidemiology. 1st Edn., Wageningen Perss, Wageningen.
Downloads
Published
Issue
Section
License
Copyright (c) 2010 Asian Network for Scientific Information
This work is licensed under a Creative Commons Attribution 4.0 International License.
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.
