Avian Influenza Viruses from Migratory and Resident Ducks of Coastal Louisiana

Stallknecht, David E.; Shane, S. M.; Zwank, Phillip J.; Senne, D. A.; Kearney, Michael T.

doi:10.2307/1591427

Cited by 151 publications

(127 citation statements)

References 15 publications

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“…The increase in antibody prevalence with latitude follows the similar trends of virus isolations seen consistently in North American dabbling ducks (Hinshaw et al, 1985;Stallknecht et al, 1990), suggesting a common source. These regional trends were consistent between years, as evidenced by a failure to detect differences in antibody prevalence at 10 locations sampled in both years.…”

supporting

confidence: 74%

Antibodies to Avian Influenza Viruses in Canada Geese (Branta canadensis): A Potential Surveillance Tool?

Kistler

Stallknecht

DeLiberto

et al. 2012

Journal of Wildlife Diseases

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supporting

confidence: 74%

Antibodies to Avian Influenza Viruses in Canada Geese (Branta canadensis): A Potential Surveillance Tool?

Kistler

Stallknecht

DeLiberto

et al. 2012

Journal of Wildlife Diseases

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“…Alternatively, purifying selection resulting in reduced mutation rates and the maintenance of existing diversity in NA, MP, and NS lineages seen in other studies may result in the persistence of these lineages, although sampling of additional migratory seasons is needed (57,58). Furthermore, the pattern of AIV prevalence for host species can change during migration for species such as northern shovelers (2.0% in northern birds and 26.0% in southern birds within the MMF), which may suggest a role for host ecology in AIV lineage survival among breeding and wintering sites in the MMF, as has been reported in other studies (59,60). Future studies should consider the roles that differing host complexes at regional localities may play in AIV persistence.…”

Section: Discussionmentioning

confidence: 73%

Spread and Persistence of Influenza A Viruses in Waterfowl Hosts in the North American Mississippi Migratory Flyway

Fries

Nolting

Bowman

et al. 2015

J Virol

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While geographic distance often restricts the spread of pathogens via hosts, this barrier may be compromised when host species are mobile. Migratory waterfowl in the order Anseriformes are important reservoir hosts for diverse populations of avian-origin influenza A viruses (AIVs) and are assumed to spread AIVs during their annual continental-scale migrations. However, support for this hypothesis is limited, and it is rarely tested using data from comprehensive surveillance efforts incorporating both the temporal and spatial aspects of host migratory patterns. We conducted intensive AIV surveillance of waterfowl using the North American Mississippi Migratory Flyway (MMF) over three autumn migratory seasons. Viral isolates (n ‫؍‬ 297) from multiple host species were sequenced and analyzed for patterns of gene dispersal between northern staging and southern wintering locations. Using a phylogenetic and nucleotide identity framework, we observed a larger amount of gene dispersal within this flyway rather than between the other three longitudinally identified North American flyways. Across seasons, we observed patterns of regional persistence of diversity for each genomic segment, along with limited survival of dispersed AIV gene lineages. Reassortment increased with both time and distance, resulting in transient AIV constellations. This study shows that within the MMF, AIV gene flow favors spread along the migratory corridor within a season, and also that intensive surveillance during bird migration is important for identifying virus dispersal on time scales relevant to pandemic responsiveness. In addition, this study indicates that comprehensive monitoring programs to capture AIV diversity are critical for providing insight into AIV evolution and ecology in a major natural reservoir. IMPORTANCEMigratory birds are a reservoir for antigenic and genetic diversity of influenza A viruses (AIVs) and are implicated in the spread of virus diversity that has contributed to previous pandemic events. Evidence for dispersal of avian-origin AIVs by migratory birds is rarely examined on temporal scales relevant to pandemic or panzootic threats. Therefore, characterizing AIV movement by hosts within a migratory season is important for implementing effective surveillance strategies. We conducted surveillance following birds along a major North American migratory route and observed that within a migratory season, AIVs rapidly reassorted and gene lineages were dispersed primarily within the migratory corridor. Patterns of regional persistence were observed across seasons for each gene segment. We show that dispersal of AIV gene lineages by migratory birds occurs quickly along migratory routes and that surveillance for AIVs threatening human and animal health should focus attention on these routes.

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“…During late August and early September in Iowa, when the banding of wild ducks occurs, and in mid-September, when duck hunting begins, a significant proportion of hatch-year mallards (up to 65%) and other ducks may be infected with influenza A virus according to other studies in North America ( 1 , 7 ). Later in the season, as the duck migration progresses, a decrease in prevalence is commonly seen ( 1 , 8 ). In late August 2004, we isolated influenza virus from mallards (60%) and from wood ducks (13%) in Iowa (data not shown).…”

Section: Discussionmentioning

confidence: 99%