Susceptibility and intra-species transmission of the H9N2 G1 prototype lineage virus in Japanese quail and turkeys
| Autor: | Roberta Aiello, Calogero Terregino, Maria Serena Beato, Francesco Bonfante, Livia Victoria Patrono, Ilaria Capua |
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| Rok vydání: | 2012 |
| Předmět: |
Turkeys
Lineage (genetic) Genotype Population Reassortment Coturnix medicine.disease_cause Microbiology Virus biology.animal medicine Influenza A Virus H9N2 Subtype Animals education Phylogeny Poultry Diseases education.field_of_study General Veterinary biology Virulence Transmission (medicine) General Medicine biology.organism_classification Virology Quail Influenza A virus subtype H5N1 Virus Shedding Influenza in Birds |
| Zdroj: | Veterinary microbiology. 165(1-2) |
| ISSN: | 1873-2542 |
| Popis: | Avian influenza viruses of the H9N2 subtype have circulated in the poultry population in Asia, Far and Middle East since the mid-1990s. One of the most widespread lineages established in poultry is the G1 lineage. This lineage has undergone further evolution and reassortment since its first detection in 1997 and G1-like H9N2 viruses still circulate. In this study we have investigated the susceptibility of quail and turkeys to the H9N2 G1-lineage prototype strain (A/quail/Hong Kong/G1/97). Contact transmission experiments were carried out in both avian species. Animals were infected oro-nasally with increasing doses of the virus (103–106 EID50/0.1 ml) and sentinel birds were introduced 4 days post infection (pi) in each experimental group. Quail were more susceptible than turkeys, as they were readily infected with lower challenge doses. Interestingly, infection of turkeys was associated with worse clinical condition. Transmission was detected in both species. Quail infected with a dose less than or equal to 104 EID50 transmitted the virus to the sentinels without showing any signs of disease. These findings reinforce the hypothesis that quail may ensure the perpetuation of H9N2 viruses in poultry, acting as a silent reservoir. |
| Databáze: | OpenAIRE |
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