Visceral lesion induced experimentally by an artrotropic strain of reovirus in broiler (Gallus gallus)

Authors

  • Simone Bertozi de Souza Vasconcelos Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • José Américo Bottino Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • José Luiz Guerra Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Patologia, São Paulo, SP
  • José Antonio Jerez Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Medicina Veterinária e Saúde Animal, São Paulo, SP

DOI:

https://doi.org/10.1590/S1413-95962001000200008

Keywords:

Reoviridae, Domestic Avian

Abstract

This paper describes visceral lesions induced by inoculation of one-day-old broiler chicks with an avian reovirus strain (S-1133) by oral and foodpad routes. The bursa of Fabricius, intestine, liver, spleen and heart of five birds from inoculated and control groups were collected in the periods of 24, 48, 72 hours and at weekly intervals from 1 to 8 weeks post inoculation for histopathological examination. Interstitial myocarditis was observed 48 hours post inoculation, pericarditis and necrotic myocarditis were seen in the first week post inoculation. The pericardium presented lymphoid follicles at 2 weeks post inoculation and in the subsequent periods there was progressive fibrosis seen until 8 weeks post inoculation. In the liver, infiltration of heterophils and mononuclear cells was observed 72 hours post inoculation, followed by degeneration and necrosis of hepatocytes at one week post inoculation. Lymphoid follicles and heterophilic infiltration were seen from 2 to 8 weeks post inoculation. The spleen presented a progressive necrosis from 48 hours to one week post inoculation and at 2 weeks post inoculation hyperplasia lymphoid was observed in the splenic tissue. No lesions were seen in the other examinated organs. Visceral lesions were similar occurring simultaneously in both inoculated groups, nevertheless the lesions were more severe in the group inoculated via footpad.

Downloads

Download data is not yet available.

Published

2001-01-01

Issue

Section

VETERINARY MEDICINE

How to Cite

1.
Vasconcelos SB de S, Bottino JA, Guerra JL, Jerez JA. Visceral lesion induced experimentally by an artrotropic strain of reovirus in broiler (Gallus gallus). Braz. J. Vet. Res. Anim. Sci. [Internet]. 2001 Jan. 1 [cited 2024 Apr. 23];38(2):84-7. Available from: https://www.revistas.usp.br/bjvras/article/view/5908