Molecular epidemiology of swine influenza A viruses in the Southeastern United States, highlights regional differences in circulating strains

No Thumbnail Available
File version
Author(s)
Kyriakis, Constantinos S
Zhang, Ming
Wolf, Stefan
Jones, Les P
Shim, Byoung-Shik
Chocallo, Anna H
Hanson, Jarod M
Jia, MingRui
Liu, Dong
Tripp, Ralph A
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2017
Size
File type(s)
Location
License
Abstract

Swine influenza A virus (IAV) can cause widespread respiratory disease with high morbidity, low mortality, and have a substantial economic impact to the swine industry. Swine infection may contribute to pandemic IAV given their susceptibility to both avian and human IAVs. Currently, three IAV subtypes (H1N1, H3N2 and H1N2) circulate in swine in North America frequently combining gene segments from avian or human viruses. This study investigated the prevalence of IAV in commercial swine herds. A total of 1878 oral fluid samples were collected from pigs of all ages from 201 commercial farms located in North Carolina and South Carolina. Sixty-eight oral fluid samples from 35 farms were positive by MP gene PCR with an overall IAV-positivity of 3.6%. On the herd level, the percentage of IAV positivity was 17.4%. Fifty-six viruses were subtyped, while 12 were partly subtyped or not subtyped at all. Using de novo assembly, complete sequences were obtained for 59 HA genes. The majority of IAVs subtyped had an H1 HA demonstrating a considerable prevalence over H3 viruses. Furthermore, only six out of eleven HA types were detected which has implications for the selection of vaccines used by swine producers in the region.

Journal Title

Veterinary Microbiology

Conference Title
Book Title
Edition
Volume

211

Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Microbiology

Microbiology not elsewhere classified

Veterinary sciences

Persistent link to this record
Citation
Collections