The aim of this study was to evaluate the economic impact caused by avian infectious laryngotracheitis (ILT) in a commercial layer farm located in the district of Chilca, Lima, with a population of 14 415 hens that was affected by the ILT from August 2008 to March 2010. A survey was conducted and visits to the farm were done to collect biosafety and production data, and production costs of the campaign with ILT and the previous campaign without ILT. The economic impact was evaluated by comparing data from both campaigns using a stochastic distribution model with the risk analysis program @ RISK 5.1®. The cost per kilogram of eggs increased by 34%, egg production declined by 16%, and mortality increased by 18% in the campaign with ILT.

The aim of this study was to quantify the economic impact of avian infectious laryngotracheitis (ILT) on productive and economic performance of broilers. Two batches of 35 000 broilers each up to 49 days of age were evaluated. The first batch was affected for ILT while the other was not affected. A survey was conducted to collect information about productive data, biosecurity and production cost per batch, as well as additional costs related to the control of the disease. The economic impact was evaluated by comparing data from both batches using a stochastic distribution model with the risk analysis program @Risk 5.1®. Besides, a statistical analysis was done to determine difference between productive data of the two batches. In the one with ILT the mortality increased by 3.51% and feed conversion rate by 16.8%, while the productive efficiency decreased by 27.3% compared with the batch...

El objetivo del estudio fue evaluar el impacto económico causado por la laringotraqueitis infecciosa aviar (LT) en una granja de ponedoras comerciales, ubicada en el distrito de Chilca, Lima, con una población de 14 415 gallinas, que fue afectada por la LT entre agosto de 2008 hasta marzo de 2009. Se elaboró una encuesta y se recolectaron datos sobre bioseguridad, producción y costos de producción del lote afectado con LT así como de la campaña previa sin LT. El impacto económico causado por LT fue evaluado comparando ambas campañas. Se utilizó un modelo de distribución estocástica con el programa para análisis de riesgo @RISK 5.1®. El costo por kilogramo de huevos producido en el lote afectado con LT se incrementó en 34% comparado con el lote libre de la enfermedad; asimismo, la producción de huevos disminuyó en 16% y la mortalidad se incrementó en 18%.

The aim of this study was to quantify the economic impact of avian infectious laryngotracheitis (ILT) on productive and economic performance of broilers. Two batches of 35 000 broilers each up to 49 days of age were evaluated. The first batch was affected for ILT while the other was not affected. A survey was conducted to collect information about productive data, biosecurity and production cost per batch, as well as additional costs related to the control of the disease. The economic impact was evaluated by comparing data from both batches using a stochastic distribution model with the risk analysis program @Risk 5.1®. Besides, a statistical analysis was done to determine difference between productive data of the two batches. In the one with ILT the mortality increased by 3.51% and feed conversion rate by 16.8%, while the productive efficiency decreased by 27.3% compared with the batch...