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H7N6 low pathogenic avian influenza outbreak in commercial turkey farms in Chile caused by a native South American Lineage
Author(s) -
Mathieu Christian,
Gonzalez Alvaro,
Garcia Alfonso,
Johow Magdalena,
Badia Catalina,
Jara Cecilia,
Nuñez Paula,
Neira Victor,
Montiel Nestor A.,
Killian Mary Lea,
Brito Barbara P.
Publication year - 2021
Publication title -
transboundary and emerging diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.392
H-Index - 63
eISSN - 1865-1682
pISSN - 1865-1674
DOI - 10.1111/tbed.13166
Subject(s) - outbreak , influenza a virus subtype h5n1 , flock , highly pathogenic , biology , lineage (genetic) , influenza a virus , virus , veterinary medicine , virology , geography , ecology , gene , medicine , genetics
Summary 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) L PAI 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.