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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2010 > Volume 9 Number 4 > G. Trenchi1,2, K. Suzuki1, M. Petruccelli1, G. Giossa1,2, G. Rodrيguez1,2 and H. Trenchi2

Comparison of the Management Characteristics of Sero-positive and Negative Chickens Against Avian Pneumovirus in Uruguay

G. Trenchi1,2, K. Suzuki1, M. Petruccelli1, G. Giossa1,2, G. Rodrيguez1,2 and H. Trenchi2
1Laboratorio de Diagnَstico de Enfermedades de las Aves y los Pilيferos, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Argentina 2ءrea de Patologيa y Producciَn Avيcola, Facultad de Veterinaria, Universidad de la Repْblica, Montevideo, Uruguay
Abstract :

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.

Keywords :
Logistic regression analysis, poultry farming operations, South America

Date Deposited : 25 Jun 2011 13:24

Last Modified : 25 Jun 2011 13:24

Official URL:

Volume 9, Number 4, - 2010 , ISSN 1682-8356

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