| genetic relatedness between a/swine/iowa/15/30(h1n1) and human influenza viruses. | the nucleotide sequences of the m and ns1 genes of influenza virus a/swine/iowa/15/30 (a/sw/iw/30)(h1n1) were determined with cloned dnas and compared with reported sequences of human and avian influenza viruses. a/sw/iw/30 virus was found to be closely similar to a/pr/8/34(h1n1) virus in the nucleotide sequences of the m and ns1 genes, the base differences between the two strains being 64 out of 1027 nucleotides in the m gene and 52 out of 740 in the ns1 gene. based on the assumptions that thes ... | 1984 | 6495656 |
| using rrt-pcr analysis and virus isolation to determine the prevalence of avian influenza virus infections in ducks at minto flats state game refuge, alaska, during august 2005. | this study describes surveillance for avian influenza viruses (aiv) in the minto flats state game refuge, high-density waterfowl breeding grounds in alaska. five hundred paired cloacal samples from dabbling ducks (northern pintail, mallard, green wing teal, and widgeon) were placed into ethanol and viral transport medium (vtm). additional ethanol-preserved samples were taken. of the ethanol-preserved samples, 25.6% were aiv rna-positive by real-time rt-pcr. the hemagglutinin (ha) and neuraminida ... | 2007 | 17541700 |
| using nested rt-pcr analyses to determine the prevalence of avian influenza viruses in passerines in western slovakia, during summer 2007. | the prevalence of avian influenza virus (aiv), together with the distribution of different aiv subtypes, was studied in migratory waterfowl and terrestrial birds caught in western slovakia during summer 2007. both oropharyngeal and cloacal swabs were collected. screening of samples revealed that 18% of oropharyngeal and 18% of cloacal samples were positive for aiv. samples from both the oropharynx and cloaca were positive in only 6.6% of cases. a total of 10 different subtypes of haemagglutinin ... | 2008 | 18777249 |
| influenza-a viruses in ducks in northwestern minnesota: fine scale spatial and temporal variation in prevalence and subtype diversity. | waterfowl from northwestern minnesota were sampled by cloacal swabbing for avian influenza virus (aiv) from july-october in 2007 and 2008. aiv was detected in 222 (9.1%) of 2,441 ducks in 2007 and in 438 (17.9%) of 2,452 ducks in 2008. prevalence of aiv peaked in late summer. we detected 27 aiv subtypes during 2007 and 31 during 2008. ten hemagglutinin (ha) subtypes were detected each year (i.e., h1, 3-8, and 10-12 during 2007; h1-8, 10 and 11 during 2008). all neuraminidase (na) subtypes were d ... | 2011 | 21931636 |
| little evidence of subclinical avian influenza virus infections among rural villagers in cambodia. | in 2008, 800 adults living within rural kampong cham province, cambodia were enrolled in a prospective cohort study of zoonotic influenza transmission. after enrollment, participants were contacted weekly for 24 months to identify acute influenza-like illnesses (ili). follow-up sera were collected at 12 and 24 months. a transmission substudy was also conducted among the family contacts of cohort members reporting ili who were influenza a positive. samples were assessed using serological or molec ... | 2014 | 24819948 |
| a prospective study of romanian agriculture workers for zoonotic influenza infections. | in this prospective study we sought to examine seroepidemiological evidence for acute zoonotic influenza virus infection among romanian agricultural workers. | 2014 | 24869796 |