| susceptibility of wood ducks to h5n1 highly pathogenic avian influenza virus. | since 2002, h5n1 highly pathogenic avian influenza (hpai) viruses have caused mortality in numerous species of wild birds; this is atypical for avian influenza virus (aiv) infections in these avian species, especially for species within the order anseriformes. although these infections document the susceptibility of wild birds to h5n1 hpai viruses and the spillover of these viruses from infected domestic birds to wild birds, it is unknown whether h5n1 hpai viruses can persist in free-living avia ... | 2007 | 17984261 |
| avian influenza viruses and avian paramyxoviruses in wintering and breeding waterfowl populations in north carolina, usa. | although wild ducks are recognized reservoirs for avian influenza viruses (aivs) and avian paramyxoviruses (apmvs), information related to the prevalence of these viruses in breeding and migratory duck populations on north american wintering grounds is limited. wintering (n=2,889) and resident breeding (n=524) ducks were sampled in north carolina during winter 2004-2006 and summer 2005-2006, respectively. overall prevalence of aiv was 0.8% and restricted to the winter sample; however, prevalence ... | 2011 | 21270016 |
| susceptibility of north american ducks and gulls to h5n1 highly pathogenic avian influenza viruses. | since 2002, h5n1 highly pathogenic avian influenza (hpa1) viruses have been associated with deaths in numerous wild avian species throughout eurasia. we assessed the clinical response and extent and duration of viral shedding in 5 species of north american ducks and laughing gulls (larus atricilla) after intranasal challenge with 2 asian h5n1 hpai viruses. birds were challenged at approximately equal to 10 to 16 weeks of age, consistent with temporal peaks in virus prevalence and fall migration. ... | 2006 | 17283615 |
| homo- and heterosubtypic low pathogenic avian influenza exposure on h5n1 highly pathogenic avian influenza virus infection in wood ducks (aix sponsa). | wild birds in the orders anseriformes and charadriiformes are the natural reservoirs for avian influenza (ai) viruses. although they are often infected with multiple ai viruses, the significance and extent of acquired immunity in these populations is not understood. pre-existing immunity to ai virus has been shown to modulate the outcome of a highly pathogenic avian influenza (hpai) virus infection in multiple domestic avian species, but few studies have addressed this effect in wild birds. in t ... | 2011 | 21253608 |
| filter-feeding bivalves can remove avian influenza viruses from water and reduce infectivity. | avian influenza (ai) viruses are believed to be transmitted within wild aquatic bird populations through an indirect faecal-oral route involving contaminated water. this study examined the influence of filter-feeding bivalves, corbicula fluminea, on the infectivity of ai virus in water. clams were placed into individual flasks with distilled water inoculated 1:100 with a low pathogenic (lp) ai virus (a/mallard/mn/190/99 (h3n8)). viral titres in water with clams were significantly lower at 24 and ... | 2009 | 19656788 |
| wood ducks (aix sponsa) as potential reservoirs for avian influenza and avian paramyxoviruses. | influenza a viruses (iavs) and avian paramyxoviruses (apmvs) are important pathogens of poultry worldwide, and both commonly occur in wild waterfowl, especially ducks in the family anatidae. although wood ducks (aix sponsa) are members of the anatidae, their behaviour differs from most other species in this family, which could affect the transmission of iavs and apmvs. we collected cloacal and oropharyngeal swab and blood samples from more than 700 wood ducks across nine states in the eastern un ... | 2015 | 25695149 |
| variation in viral shedding patterns between different wild bird species infected experimentally with low-pathogenicity avian influenza viruses that originated from wild birds. | the prevalence of infection with avian influenza (ai) virus varies significantly between taxonomic orders and even between species within the same order. the current understanding of ai infection and virus shedding parameters in wild birds is limited and largely based on trials conducted in mallards (anas platyrhynchos). the objective of the present study was to provide experimental data to examine species-related differences in susceptibility and viral shedding associated with wild bird-origin ... | 2011 | 21500030 |