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- W3201208509 abstract "Coccidiosis is an enteric disease caused by protozoa of the Eimeria genus and is of great economic relevance in industrial aviculture. The objective of this work was to determine the prevalence of Eimeria sp. in broiler poultry houses with positive (System 1) and negative (System 2) pressure ventilation and assess the associated factors. A transversal study was conducted using 8 random broiler chickens from 64 houses (n = 512) and macroscopic and histologic evaluation of the intestines, as well as PCR for Eimeria sp. The prevalence of Eimeria sp. was 90.6% (95% confidence interval [CI]: 97.8-83.5), with 93.8% (95% CI: 100-85.4) in System 1 and 87.5% (95% CI: 99.0-76.0) in System 2. The most prevalent species was Eimeria acervulina, and the most common combination was Eimeria acervulina, Eimeria maxima, and Eimeria tenella. System 2 and the negative Eimeria subgroup showed the best results for feed conversion and daily weight gain. By evaluating litter treatment, we found that quicklime reduced the risk of presence of Eimeria maxima and Eimeria tenella. In conclusion, Eimeria sp. had a high prevalence in both systems, with a predominance of mixed infections. System 2 and negative flocks showed the best zootechnical results.Prevalencia de Eimeria sp. en casetas de pollo de engorde con presión positiva y presión negativa. La coccidiosis es una enfermedad entérica causada por protozoos del género Eimeria. Es una enfermedad de gran relevancia económica en la avicultura industrial. El objetivo de este trabajo fue determinar la prevalencia de Eimeria sp. en gallineros de engorde con ventilación de presión positiva (sistema 1) y negativa (sistema 2) y evaluar los factores asociados. Se realizó un estudio transversal con ocho pollos de engorde de 64 galpones (n = 512) con los cuales se realizó una evaluación macroscópica e histológica de los intestinos, así como PCR para Eimeria sp. La prevalencia de Eimeria sp. fue 90,6% (95% CI: 97,8-83,5), con 93,8% (95% CI: 100-85,4) en el sistema 1 y 87,5% (95% CI: 99,0-76,0) en el sistema 2. La especie más prevalente fue Eimeria acervulina, y la combinación más común fue Eimeria acervulina, Eimeria maxima y Eimeria tenella. El sistema 2 y el subgrupo Eimeria negativo mostraron los mejores resultados para la conversión alimenticia y el aumento de peso diario. Al evaluar el tratamiento de la cama, la cal viva redujo el riesgo de presencia de Eimeria maxima y Eimeria tenella. En conclusión, Eimeria sp. tuvo una alta prevalencia en ambos sistemas, con predominio de infecciones mixtas. El sistema 2 y los lotes negativos mostraron los mejores resultados zootécnicos." @default.
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- W3201208509 date "2021-09-07" @default.
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- W3201208509 title "Prevalence of Eimeria sp. in Broiler Poultry Houses with Positive and Negative Pressure Ventilation Systems in Southern Brazil" @default.
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- W3201208509 doi "https://doi.org/10.1637/aviandiseases-d-21-00044" @default.
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