1. Spillback transmission of European H1N1 avian-like swine influenza viruses to turkeys: A strain-dependent possibility?
- Author
-
Bonfante F, Fusaro A, Tassoni L, Patrono LV, Milani A, Maniero S, Salviato A, and Terregino C
- Subjects
- Animals, Antibodies, Viral blood, Erythrocytes virology, Hemagglutinins chemistry, Host Specificity, Humans, Influenza A Virus, H1N1 Subtype immunology, Influenza A Virus, H1N1 Subtype isolation & purification, Influenza in Birds immunology, Microbial Viability, Molecular Sequence Data, Mutation, Phylogeny, Sequence Homology, Swine, Swine Diseases virology, Virus Attachment, Virus Replication physiology, Virus Shedding, Influenza A Virus, H1N1 Subtype classification, Influenza A Virus, H1N1 Subtype genetics, Influenza in Birds transmission, Influenza in Birds virology, Turkeys
- Abstract
In 1979, an avian influenza virus of the H1N1 subtype began to circulate in European swine herds, rapidly replacing classical swine H1N1 viruses. Spill-back transmissions to turkeys were recorded occasionally, but they might have been underreported due to the asymptomatic nature of the infection and the lack of specific surveillance. In our study, we evaluated the infectivity and transmissibility in turkeys of seven strains of H1N1 avian-like swine viruses isolated from 1979 to 2006, and compared them with their closest progenitor A/duck/Bavaria/1/77 (H1N1), to establish whether the adaptation to pigs has gradually decreased their fitness in turkeys. Our data indicate that the circulation of European H1N1 in pigs might have impaired the possibility of infecting turkeys. Nevertheless, the two swine-origin strains, which showed the ability to replicate and transmit in turkeys, possess typical swine-like genetic traits, not different from the rest of the tested isolates, suggesting replication of avian-like swine H1N1 viruses in turkeys as a strain-dependent polygenic feature., (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Published
- 2016
- Full Text
- View/download PDF