期刊
TRANSBOUNDARY AND EMERGING DISEASES
卷 68, 期 1, 页码 2-12出版社
WILEY
DOI: 10.1111/tbed.13166
关键词
disease outbreaks; Influenza in birds; phylogeny; poultry; Viruses
资金
- University of Technology Sydney under the Chancellor's Research Fellowship Program Funding Source: Medline
- Investigación Asociativa from the Comisión Nacional de Investigación Científica y Tecnológica, project CONICYT-PIA Anillo ACT [1408] Funding Source: Medline
In December 2016, two grow-out turkey farms in Valparaiso Region, Chile were affected by low pathogenic avian influenza (LPAI) caused by H7N6 subtype. Control measures were implemented, and the virus was found to be closely related to Chilean aquatic bird viruses and South American lineage, with similarities to the 2002 highly pathogenic avian influenza outbreak in Chile.
In December 2016, low pathogenic avian influenza (LPAI) caused by an H7N6 subtype was confirmed in a grow-out turkey farm located in Valparaiso Region, Chile. Depopulation of exposed animals, zoning, animal movement control and active surveillance were implemented to contain the outbreak. Two weeks later, a second grow-out turkey farm located 70 km north of the first site was also infected by H7N6 LPAI, which subsequently spilled over to one backyard poultry flock. The virus involved in the outbreak shared a close genetic relationship with Chilean aquatic birds' viruses collected in previous years. The A/turkey/Chile/2017(H7N6) LPAI virus belonged to a native South American lineage. Based on the H7 and most of the internal genes' phylogenies, these viruses were also closely related to the ones that caused a highly pathogenic avian influenza outbreak in Chile in 2002. Results from this study help to understand the regional dynamics of influenza outbreaks, highlighting the importance of local native viruses circulating in the natural reservoir hosts.
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