Pathogenicity differences between South African isolates of Ornithobacterium rhinotracheale
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Date
Authors
Travers, A.F.
Coetzee, L.
Journal Title
Journal ISSN
Volume Title
Publisher
Published by the Agricultural Research Council, Onderstepoort Veterinary Institute
Abstract
Three selected South African Ornithobacterium rhinotracheale field isolates were identified and inoculated
via the caudal abdominal airsac into 28-day-old broilers, which were monitored under controlled
laboratory conditions. It was concluded from data that the O. rhinotracheale isolates were capable of
causing primary disease, with statistically significant resultant mass loss. Respiratory and arthritis symptoms
were reproduced. However, no sinusitis was observed.
Airsacculitis- and arthritis-lesion scoring techniques showed significant pathogenicity differences between
isolates. Furthermore, differences in symptomatology were also seen between isolates. A highly
significant reisolation of O. rhinotracheale was made from the brains of broilers challenged with isolate
2.
In conclusion, the economic importance and financial loss due to Ornithobacterium rhinotracheale
infections in poultry were highlighted.
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Keywords
Veterinary medicine, Isolates, Ornithobacterium rhinotracheale, Pathogenicity differences
Sustainable Development Goals
Citation
Travers, AF, Coetzee, L & Gummow, B 1996, 'Pathogenicity differences between South African isolates of Ornithobacterium rhinotracheale’. Onderstepoort Journal of Veterinary Research, vol. 63, no. 3, pp. 197-207.