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antigenic, genetic, and pathogenic characterization of h5n1 highly pathogenic avian influenza viruses isolated from dead whooper swans (cygnus cygnus) found in northern japan in 2008.in april and may 2008, whooper swans (cygnus cygnus) were found dead in hokkaido in japan. in this study, an adult whooper swan found dead beside lake saroma was pathologically examined and the identified h5n1 influenza virus isolates were genetically and antigenically analyzed. pathological findings indicate that the swan died of severe congestive edema in the lungs. phylogenetic analysis of the ha genes of the isolates revealed that they are the progeny viruses of isolates from poultry and wil ...201020848174
lead poisoning in whooper and tundra swans.six weak whooper swans (cygnus cygnus) and two weak tundra swans (cygnus columbianus) were found at swamp miyajima (hokkaido, japan) in may 1998. anorexia, depression, green watery feces, pale conjunctiva, and anemia were observed. radiographs showed from six to 38 suspected lead pellets in the gizzard. blood lead concentrations were 2.5-6.7 microg/g (mean+/-sd=4.6+/-1.14 microg/g) on day 1. after blood collection, the birds were treated with calcium disodium ethylenediaminetetraacetate (caedta) ...200515827233
pathological study of lead poisoning in whooper swans (cygnus cygnus) in japan.during spring 1989, thirty-three whooper swans (cygnus cygnus) died at lake miyajima in hokkaido, japan; 15 were examined. the birds were diagnosed as having subacute lead poisoning due to ingestion of spent lead shot. the main gross findings were bile-stained liver, edematous or gelatinous bone marrow, bile-stained lining with hyperkeratosis and lead pellets in the gizzard, and proventricular impaction. histopathologically, there was lead-hemolytic jaundice of the liver, hemosiderosis in the li ...19921627104
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