Flock-Level Seroprevalence against Avian Pneumovirus amongst Uruguayan Broiler Chickens
Abstract:
The objective of this study was to estimate the true prevalence of seropositive broiler chickens against avian pneumovirus at flock-level in Uruguay, using the Rogan-Gladen estimator in conjunction with Bayesian inference. A total of 181 pooled samples (consisting of 10 individual-chicken sera each) from the study area were examined with the enzyme-linked immunosorbent assay. All individual-chicken samples in the pools were also examined with the same assay. Forty-four pools were classified as test positive, because they included at least one individual-chicken classified as positive. The estimates for the deterministic (Rogan-Gladen approach) and stochastic (Bayesian approach) true prevalence were 30.9% [95% confidence interval (CI): 26.8-35.0%] and 31.4% (95% CI: 15.4-49.5%), respectively.
How to cite this article
G. Giossa, K. Suzuki, M. Petruccelli, G. Rodriguez, G. Trenchi and H. Trenchi, 2010. Flock-Level Seroprevalence against Avian Pneumovirus amongst Uruguayan Broiler Chickens. International Journal of Poultry Science, 9: 217-220.
REFERENCES
Cameron, A.R., 1999. Survey Toolbox: A Practical Manual and Software Package for Active Surveillance of Livestock Diseases in Developing Countries. Australian Centre for International Agricultural Research, Canberra, ACT, Australia
Carstensen, B., M. Plummer, E. Laara and M. Hills, 2009. Epi: A package for statistical analysis in epidemiology. R Package Version 1.1.7. http://CRAN.R-project.org/package=Epi
Cook, J.K.A., 2000. Avian pneumovirus infections of turkeys and chickens. Vet. J., 160: 118-125.
CrossRef
Cook, J.K.A. and D. Cavanagh, 2002. Detection and differentiation of avian pneumoviruses (metapneumoviruses). Avian Pathol., 31: 117-132.
CrossRef Direct Link
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.
PubMed Direct Link
FAO, 2009. FAOSTAT: FAO Statistical Database. FAO, Rome, Italy
Direct Link
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
Herrero, M., K. Suzuki, J. Origlia, L. Nunez and M. Faccioli et al., 2009. Probability mapping for Mycoplasma gallisepticum risk in backyard chickens in Paraguay. Int. J. Poult. Sci., 8: 565-569.
CrossRef Direct Link
Hintze, J., 2007. NCSS 2007 Software. NCSS, Kaysville, UT, USA
Hintze, J., 2008. PASS 2008 Software. NCSS, Kaysville, UT, USA
Lunn, D.J., A. Thomas, N. Best and D. Spiegelhalter, 2000. WinBUGS-a Bayesian modelling framework: Concepts, structure and extensibility. Stat. Comput., 10: 325-337.
CrossRef
Ministerio de Ganaderia Agricultura y Pesca, 2009. Division contralor de semovientes. Montevideo. http://www.mgap.gub.uy/dgsg/DICOSE/dicose.htm
Origlia, J., K. Suzuki, L. Castro, M. Faccioli and M. Silva et al., 2009. Bayesian mapping for infectious bronchitis virus risk in backyard chickens in Paraguay. Int. J. Poult. Sci., 8: 740-745.
CrossRef Direct Link
Peres, M.F., A.S. Carrijo, J.A. Higa and J.M. de Oliveira, 2006. Serological evidence of avian pneumovirus infections in broiler flocks in counties of Mato Grosso do Sul. Pesqui. Vet. Brasil., 26: 254-258.
CrossRef Direct Link
R Development Core Team, 2009. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. http://www.R-project.org.
Rogan, W.J. and B. Gladen, 1978. Estimating prevalence from results of a screening-test. Am. J. Epidemiol., 107: 71-76.
Suzuki, K., J. Origlia, F. Alvarez, M. Faccioli and M. Silva et al., 2009. Relative risk estimation for Mycoplasma synoviae in backyard chickens in Paraguay. Int. J. Poult. Sci., 8: 842-847.
Vose, D., 2008. Risk Analysis: A Quantitative Guide. 3rd Edn., Wiley, Chichester, UK. Pages: 752
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