Publications

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waterfowl ecology and avian influenza in california: do host traits inform us about viral occurrence?we examined whether host traits influenced the occurrence of avian influenza virus (aiv) in anatidae (ducks, geese, swans) at wintering sites in california's central valley. in total, 3487 individuals were sampled at sacramento national wildlife refuge and conaway ranch duck club during the hunting season of 2007-08. of the 19 anatidae species sampled, prevalence was highest in the northern shoveler (5.09%), followed by the ring-necked duck (2.63%), american wigeon (2.57%), bufflehead (2.50%), g ...201020521673
correlations of daily activity with avian cholera mortality among wildfowl.we tested the hypothesis that wildfowl activities can influence the risk of avian cholera (pasteurella multocida infection) for susceptible birds at centerville, humboldt county, california (usa). avian cholera mortality characteristics from past epizootics were correlated with variations in flock size, habitat use and 11 feeding and nonfeeding behaviors among six empirically defined groups of wildfowl: american coots (fulica americana), tundra swans (cygnus columbianus), american wigeon (anas a ...19911758019
surveillance for highly pathogenic influenza a viruses in california during 2014-2015 provides insights into viral evolutionary pathways and the spatiotemporal extent of viruses in the pacific americas flyway.we used surveillance data collected in california before, concurrent with, and subsequent to an outbreak of highly pathogenic (hp) clade 2.3.4.4 influenza a viruses (iavs) in 2014-2015 to (i) evaluate iav prevalence in waterfowl, (ii) assess the evidence for spill-over infections in marine mammals and (iii) genetically characterize low-pathogenic (lp) and hp iavs to refine inference on the spatiotemporal extent of hp genome constellations and to evaluate possible evolutionary pathways. we screen ...201728874792
influenza a viruses in wild birds of the pacific flyway, 2005-2008.avian influenza viruses (aivs) pose a significant threat to public health, and viral subtypes circulating in natural avian reservoirs can contribute to the emergence of pathogenic influenza viruses in humans. we investigated the prevalence and distribution of aivs in 8826 migratory and resident wild birds in north america along the pacific flyway, which is a major north-south migration pathway that overlaps with four other flyways in alaska providing opportunities for mixing of eurasian and amer ...201020059316
epizootiological features of avian cholera on the north coast of california.an avian cholera (pasteurella multocida) epizootic was observed among wildfowl at the centerville gun club, humboldt county, california (usa) in january 1978. compared to their live populations and use of the area, coots (fulica americana) died in proportionately greater numbers than any other species. coots collected by gunshot were evaluated for sex and age composition, and morphometry from november 1977 through mid-january 1978 at this site. there was no substantial difference in the sex, age ...19892716104
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