Translator Disclaimer
10 January 2022 Circulation and Molecular Characterization of Hemorrhagic Enteritis Virus in Commercial Turkey and Meat Chicken Flocks in Australia
Priscilla F. Gerber, Stephen Spatz, Peter Gray, Sheridan Alfirevich, Stephen W. Walkden-Brown
Author Affiliations +
Abstract

Currently, there is no available vaccine against hemorrhagic enteritis virus (HEV) in Australia. Although it is assumed that subclinical HEV infections occur and may be associated with an increase in colibacillosis in Australian commercial turkey flocks, the prevalence of infection with this virus in the country is largely unknown. The aims of this study were to determine the extent of HEV infection in commercial flocks in Australia and to investigate the diversity of Australian HEV strains. Serum and spleen samples were collected from breeder and grower turkeys and serum was collected from breeder and grower chickens by the two major poultry integrator companies in Australia. Of the turkey samples, 727/849 (86%) sera were positive for anti-HEV antibodies by ELISA. HEV DNA was detected in 215/278 (77%) spleen samples positive by PCR. Of the meat chicken sera, 115/144 (80%) samples were seropositive. Sequencing the whole genome of three HEV field isolates showed that the Australian strains are highly similar and cluster separately from strains from other geographic regions although several point mutations were shared with HEV strains considered to be virulent. In conclusion, HEV infection is ubiquitous in Australian commercial poultry flocks. The impact of the many genomic point mutations detected in Australian HEV strains on virus pathogenicity is unclear.

Priscilla F. Gerber, Stephen Spatz, Peter Gray, Sheridan Alfirevich, and Stephen W. Walkden-Brown "Circulation and Molecular Characterization of Hemorrhagic Enteritis Virus in Commercial Turkey and Meat Chicken Flocks in Australia," Avian Diseases 66(1), 53-59, (10 January 2022). https://doi.org/10.1637/21-00095
Received: 5 October 2021; Accepted: 2 November 2021; Published: 10 January 2022
JOURNAL ARTICLE
7 PAGES


Share
SHARE
KEYWORDS
prevalence
turkey adenovirus 3
virulence
whole genome sequencing
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top