Retrospective and prospective studies of transmissible viral proventriculitis in broiler chickens in Brazil
| Autor: | Raphael Rocha Wenceslau, Mauricio G. C. Resende, Philipe A Leão, Érica Azevedo Costa, Matheus V. L. Moreira, Camila I Amaral, Letícia B. de Oliveira, Roselene Ecco, Willian H. M. Santos |
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| Rok vydání: | 2021 |
| Předmět: |
Pathology
medicine.medical_specialty Necrosis animal structures 040301 veterinary sciences animal diseases Veterinary pathology Stomach Diseases 0403 veterinary science 03 medical and health sciences Metaplasia Birnaviridae Medicine Animals Prospective Studies Prospective cohort study Histiocyte Poultry Diseases 030304 developmental biology Retrospective Studies 0303 health sciences General Veterinary Proventriculitis business.industry digestive oral and skin physiology Broiler food and beverages 04 agricultural and veterinary sciences Birnaviridae Infections Histopathology Proventriculus Brief Reports medicine.symptom business Brazil |
| Zdroj: | J Vet Diagn Invest |
| ISSN: | 1943-4936 |
| Popis: | We investigated the occurrence and pathologic findings of transmissible viral proventriculitis (TVP) associated with the chicken proventricular necrosis virus (CPNV) in commercial broiler chickens in southeastern Brazil. Seventy-three broilers, 25–36 d old, with a history of reduced growth, were referred to our veterinary pathology services from 2013 to 2017. Broilers were clinically examined, weighed, and euthanized for postmortem examination. Broilers of different ages with proventricular histologic lesions were positive for CPNV by RT-PCR; however, the intensity of histologic lesions was higher among 33-d-old animals, and viral RNA detection was more frequent among those that were 28 d old. In the proventriculi of 35 of 73 (48%) broilers, lesions were characterized by glandular epithelial necrosis, lymphoplasmacytic and histiocytic infiltrates, and metaplasia of glandular epithelium to ductal epithelium. In 24 of 73 (36%) broilers with histologic TVP-compatible lesions, CPNV was detected by RT-PCR for the viral protein 1 ( VP1) gene. Broilers with histologic lesions were lighter than expected compared to the Cobb 500 standard weight. TVP has not been reported previously in broiler chickens in Brazil, to our knowledge. |
| Databáze: | OpenAIRE |
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