| recent and chronic exposure of wild ducks to lead in human-modified wetlands in santa fe province, argentina. | poisoning of waterfowl due to ingestion of lead pellets is a worldwide problem in areas that are subject to hunting. no studies have assessed exposure of waterbirds to this heavy metal in argentina, in spite of intense hunting activity, and the fact that only lead ammunition is commercially available. the objective of this study was to evaluate duck exposure to lead by examining gizzard and bone samples collected from 30 wild ducks, 16 rosy-billed pochard (netta peposaca), and 14 fulvous whistli ... | 2009 | 19617495 |
| Phylogenetic Analysis of H6 Influenza Viruses Isolated from Rosy-Billed Pochards (Netta peposaca) in Argentina Reveals the Presence of Different HA Gene Clusters. | Until recently, influenza A viruses from wild waterfowl in South America were rarely isolated and/or characterized. To explore the ecology of influenza A viruses in this region, a long-term surveillance program was established in 2006 for resident and migratory water birds in Argentina. We report the characterization of 5 avian influenza viruses of the H6 hemagglutinin (HA) subtype isolated from rosy-billed pochards (Netta peposaca). Three of these viruses were paired to an N2 NA subtype, while ... | 2011 | 21976652 |
| isolation and characterization of an h9n2 influenza virus isolated in argentina. | as part of our ongoing efforts on animal influenza surveillance in argentina, an h9n2 virus was isolated from a wild aquatic bird (netta peposaca), a/rosy-billed pochard/argentina/cip051-559/2007 (h9n2) - herein referred to as 559/h9n2. due to the important role that h9n2 viruses play in the ecology of influenza in nature, the 559/h9n2 isolate was characterized molecularly and biologically. phylogenetic analysis of the ha gene revealed that the 559/h9n2 virus maintained an independent evolutiona ... | 2012 | 22709552 |
| lead gunshot pellet ingestion and tissue lead levels in wild ducks from argentine hunting hotspots. | lead poisoning in waterfowl due to ingestion of lead pellets is a long recognized worldwide problem but poorly studied in south america, particularly in argentinean wetlands where duck hunting with lead gunshot is extensive. in 2008, we found high pellet ingestion rates in a small sample of hunted ducks. to expand our knowledge on the extent of lead exposure and to assess health risks from spent shot intake, during 2011 and 2012 we sampled 415 hunter-killed ducks and 96 live-trapped ducks. we de ... | 2014 | 24314629 |
| multiple endocardial neurofibromas in a rosy-billed pochard (netta peposaca). | endocardial neoplasms are uncommon in veterinary species with most cases restricted to endocardial schwannomas in aged rats. a 15-year-old male rosy-billed pochard (netta peposaca) was diagnosed following necropsy with numerous, proliferative endocardial masses. histologically, these masses were composed of interlacing streams and bundles of neoplastic spindle cells supported by a fine fibrovascular stroma. rare areas of cellular and nuclear palisading were present in the nodules. approximately ... | 2012 | 22362538 |