characterizing the temporal patterns of avian influenza virus introduction into japan by migratory birds.the objectives of the present study were to observe the temporal pattern of avian influenza virus (aiv) introduction into japan and to determine which migratory birds play an important role in introducing aiv. in total, 19,407 fecal samples from migratory birds were collected at 52 sites between october 2008 and may 2015. total nucleic acids extracted from the fecal samples were subjected to reverse transcription loop-mediated isothermal amplification to detect viral rna. species identification ...201728484128
[phylogeography of the mallard anas platyrhynchos from eurasia inferred from sequencing of the mtdna control region].phylogenetic relationships, demographic history, and geographic distribution of the mtdna haplotypes of the mallard anas platyrhynchos were examined in three populations, indian, northern european, and far eastern. two divergent haplotype groups, a and b, were found in the far eastern population, while haplotypes identified in northern european and far eastern populations were exclusively of the a group. the presence of b group haplotypes in the far eastern population can be explained either in ...201222988769
origin and genetic diversity of chinese domestic ducks.china is particularly rich in duck genetic resources. in order to reveal the genetic diversity and origin of chinese domestic duck, the 667 bp control region of mitochondrial dna of 238 domestic ducks from 26 indigenous breeds, 25 wild mallards and nine spot-billed ducks were sequenced and analyzed them together with the published data for 12 mallards and nine spot-billed ducks. the haplotype diversity (hd, 0.645) and average nucleotide diversity (pi, 0.115%) indicate low genetic diversity of ch ...201020674751
intestinal carriage of yersinia pseudotuberculosis by wild birds and mammals in japan.fecal specimens were obtained from wild birds and mammals in the eastern part of shimane prefecture, japan, an area where serotype 1b, 2b, 3, and 4b strains of yersinia pseudotuberculosis were found to be prevalent in humans. each of 869 animals, including 259 wild birds and 610 wild mammals, was screened for yersiniae. a total of 37 strains of y. pseudotuberculosis were isolated from 34 (5.6%) mammals, including 23 raccoon dogs (nyctereutes procyonoides), eight deer (cervus nippon), two hares ( ...19912059038
genetic diversity and systematic evolution of chinese domestic ducks along the yangtze-huai investigate the population structure and systematic evolution of the domestic duck in china, we sequenced the 667 bp mitochondrial dna (mtdna) d-loop control region of 106 ducks from nine breeds along the yangtze-huai river. of the total analyzed sites, 34 (5.1%) were polymorphic due to transitions, transversions, insertions, and deletions. nucleotide content was 25.6% a, 33.3% c, 15.2% g, and 25.9% t. in total, 31 haplotypes were identified in the target region; of these, the major haplotype ...200717939031
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