Historical Prevalence and Distribution of Avian Influenza Virus A(H7N9) among Wild Birds
نویسندگان
چکیده
We examined 48 published studies for which sample sizes could be ascertained to determine the historic prevalence of influenza A(H7N9) virus in wild bird populations and reviewed GenBank data to further establish its distribution. Low prevalence (0.0093%) in Asia suggests > 30,000 samples would be required to detect the H7N9 subtype in wild birds.
منابع مشابه
Mortality of wild swans associated with naturally infection with highly pathogenic H5N1 avian influenza virus in Iran
In the February 2006 in two wetlands in northern Iran, the mortality among wild swans was observed. Paralysis was the most prominent feature of the disease. Histologically, diffused necrosis of acinar cells in pancreas, degeneration and necrosis of some neurons in central nervous system (CNS), sever necrotic and hemorrhagic enteritis, foci of haemorrahge and myocardial cell necrosis in the he...
متن کاملSurveillance of Influenza A Virus and Its Subtypes in Migratory Wild Birds of Nepal
Nepal boarders India and China and all three countries lie within the Central Asian Flyway for migratory birds. Novel influenza A H7N9 caused human fatalities in China in 2013. Subclinical infections of influenza A H7N9 in birds and the potential for virus dispersal by migratory birds prompted this study to assess avian H7N9 viral intrusion into Nepal. Surveillance of influenza A virus in migra...
متن کاملEmergency surveillance for novel influenza A(H7N9) virus in domestic poultry, feral pigeons and other wild birds in Bhutan.
Following the March 2013 outbreak of novel avian influenza A(H7N9) virus in humans and the subsequent isolation of the virus from chickens, ducks and pigeons in the People's Republic of China, concerns were raised that the H7N9 virus would spread beyond China through the poultry value chain linking to a number of bordering countries. For this reason, a rapid emergency surveillance exercise took...
متن کاملInfluenza A(H7N9) Virus Transmission between Finches and Poultry
Low pathogenicity avian influenza A(H7N9) virus has been detected in poultry since 2013, and the virus has caused >450 infections in humans. The mode of subtype H7N9 virus transmission between avian species remains largely unknown, but various wild birds have been implicated as a source of transmission. H7N9 virus was recently detected in a wild sparrow in Shanghai, China, and passerine birds, ...
متن کاملInfluenza A Viruses from Wild Birds in Guatemala Belong to the North American Lineage
The role wild bird species play in the transmission and ecology of avian influenza virus (AIV) is well established; however, there are significant gaps in our understanding of the worldwide distribution of these viruses, specifically about the prevalence and/or significance of AIV in Central and South America. As part of an assessment of the ecology of AIV in Guatemala, we conducted active surv...
متن کامل