Pathogenicity and molecular characteristics of infectious bronchitis virus (IBV) strains isolated from broilers showing diarrhoea and respiratory disease

1. The possibility that infectious bronchitis virus (IBV) variants isolated from broilers with enteric and respiratory problems have a different tropism and pathological outcome from those IBV strains causing classical respiratory disease was investigated. 2. IBV variants were isolated from broiler...

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Bibliographic Details
Published in:British poultry science 2014, Vol.55 (3), p.271-283
Main Authors: Chacón, J. L, Assayag, M. S, Revolledo, L, Astolfi-Ferreira, C. S, Vejarano, M. P, Jones, R. C, Piantino Ferreira, A. J
Format: Article
Language:English
Subjects:
Animals
biological resistance
chickens
Chickens - immunology
Chickens - virology
chicks
Coronavirus Infections - immunology
Coronavirus Infections - veterinary
Coronavirus Infections - virology
diarrhea
Disease Outbreaks - veterinary
flocks
Infectious bronchitis virus
Infectious bronchitis virus - genetics
Infectious bronchitis virus - isolation & purification
Infectious bronchitis virus - pathogenicity
intestines
kidneys
pathogenicity
respiratory tract diseases
seroconversion
specific pathogen-free animals
testes
tissue tropism
tissues
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Summary:1. The possibility that infectious bronchitis virus (IBV) variants isolated from broilers with enteric and respiratory problems have a different tropism and pathological outcome from those IBV strains causing classical respiratory disease was investigated. 2. IBV variants were isolated from broiler flocks with enteric and respiratory problems in two regions of Brazil. The USP-10 isolate, of enteric origin, was inoculated via the oral oroculonasal routes into IBV-antibody-free broilers and specific pathogen-free (SPF) chickens to determine tissue tropism and pathogenicity and compared with an IBV variant (USP-50) isolated from chickens showing signs of respiratory disease only. 3. Both USP-10 and USP-50 strains caused similar pathological patterns by either route of inoculation. Both variants were detected in respiratory and non-respiratory tissues, including the kidney, intestine and testis. 4. Broilers were more susceptible to infection than SPF chickens, and seroconversion was detected in all of the chicks.
ISSN:1466-1799
0007-1668
1466-1799
DOI:10.1080/00071668.2014.903558