The chronic respiratory disease (CRD) is considered as an infectocontagious disease of multiple etiology that causes great economic losses in poultry farming. The clinical signs and lesions in affected animals can be severe when mixed infections occur. In Cuba this respiratory complex is evident; however, it is not known how the hemathological values vary in affected fowls. The objective of this study was to determine the hemathological values and anatomopathological lesions in CRD affected White Leghorn hens. A total of 34 hens of 32 weeks of age were sampled in an affected flock (17 affected and 17 healthy) and was conducted the clinical evaluation, necropsy, isolation and identification of bacteria and hematological analysis. The frequencies of microorganisms and lesions present, as well as means of hematological variables between ill and healthy birds were compared. The presence of O...

La enfermedad respiratoria crónica (ERC) es considerada como una de las enfermedades infectocontagiosas de etiología múltiple que ocasiona grandes pérdidas económicas en la avicultura. Las manifestaciones clínicas y lesiones pueden ser muy severas cuando ocurren infecciones mixtas. Este complejo respiratorio ha estado presente en Cuba; sin embargo, no se conoce cómo varían los valores hematológicos en aves afectadas. El objetivo del presente estudio fue determinar los valores hematológicos y las lesiones anatomopatológicas en gallinas White Leghorn afectadas por la ERC. Se muestrearon 34 animales de 32 semanas de edad dentro de un foco activo (17 afectados y 17 clínicamente sanos) para la exploración clínica, necropsia, aislamiento e identificación de bacterias, y evaluación hematológica. Se compararon frecuencias de microorganismos y lesiones presentes, así como las me...

This study aimed to determine the clinical signs and pathological findings caused for Ornithobacterium rhinotracheale and Escherichia coli in White Leghorn layers under controlled conditions. A total of 80 replacement hens of five weeks were selected. Before starting the experiment, microbiological tests were conducted in 16 chicks to verify if they were exposed to pathogens. The remaining 64 chicks were distributed in four equal groups (n=16). On day 1 of the experiment G1 and G2 were inoculated via intranasal with 0.6 x 107 UFC/ml of O. rhinotracheale and G3 and G4 (negative control) received brain heart infusion broth. Forty eight hours later, G2 and G3 were inoculated via intranasal with 0.6 x 107 UFC of E. coli. Four chicks per group were slaughtered on days 3, 7, 14, and 21 after inoculation and samples were collected from paranasal sinuses, trachea, lung, air sacs and liver for op...

This study aimed to determine the clinical signs and pathological findings caused for Ornithobacterium rhinotracheale and Escherichia coli in White Leghorn layers under controlled conditions. A total of 80 replacement hens of five weeks were selected. Before starting the experiment, microbiological tests were conducted in 16 chicks to verify if they were exposed to pathogens. The remaining 64 chicks were distributed in four equal groups (n=16). On day 1 of the experiment G1 and G2 were inoculated via intranasal with 0.6 x 107 UFC/ml of O. rhinotracheale and G3 and G4 (negative control) received brain heart infusion broth. Forty eight hours later, G2 and G3 were inoculated via intranasal with 0.6 x 107 UFC of E. coli. Four chicks per group were slaughtered on days 3, 7, 14, and 21 after inoculation and samples were collected from paranasal sinuses, trachea, lung, air sacs and liver for op...