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Current limitations in control of viral arthritis and tenosynovitis caused by avian reoviruses in commercial poultry.
- Source :
-
Veterinary microbiology [Vet Microbiol] 2017 Jul; Vol. 206, pp. 152-156. Date of Electronic Publication: 2016 Dec 13. - Publication Year :
- 2017
-
Abstract
- Avian reoviruses are the causative agent of viral arthritis/tenosynovitis in chickens and turkeys. Clinical signs of disease include swelling of the hock joints accompanied by lesions in the gastrocnemius and digital flexor tendons causing lameness in addition to hydropericardium. The economic impact is significant as it results in poor weight gain, increased feed conversion ratios and condemnations at the processing plant. Vaccination with both live attenuated and inactivated oil emulsion vaccines have been used successfully for decades to control the disease. Current commercial vaccine strains belong to the same serotype and are antigenically and serologically distinct from circulating variant field viruses isolated from clinical cases of tenosynovitis. Since 2012, there has been a dramatic increase in the number of clinical cases of tenosynovitis in commercial poultry and commercial vaccines are unable to provide adequate levels of protection against disease. Producers have elected to use custom inactivated vaccines in the absence of any commercially available homologous vaccines. Identification and selection of field isolates for use in autogenous vaccines can be difficult especially when multiple reoviruses are co-circulating among flocks. In addition, field data suggests that in some cases the custom vaccines are providing adequate protection against disease but as new genetic variants emerge, new vaccines are needed.<br /> (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Subjects :
- Animals
Arthritis, Infectious epidemiology
Arthritis, Infectious prevention & control
Arthritis, Infectious veterinary
Arthritis, Infectious virology
Chickens virology
Immunity
Poultry
Poultry Diseases epidemiology
Poultry Diseases virology
Reoviridae Infections epidemiology
Reoviridae Infections prevention & control
Tenosynovitis epidemiology
Tenosynovitis prevention & control
Tenosynovitis veterinary
Tenosynovitis virology
Turkeys virology
Vaccination veterinary
Viral Vaccines administration & dosage
Chickens immunology
Orthoreovirus, Avian immunology
Poultry Diseases prevention & control
Reoviridae Infections veterinary
Turkeys immunology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2542
- Volume :
- 206
- Database :
- MEDLINE
- Journal :
- Veterinary microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 28024855
- Full Text :
- https://doi.org/10.1016/j.vetmic.2016.12.014