Publications

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active migration is associated with specific and consistent changes to gut microbiota in calidris shorebirds.gut microbes are increasingly recognised for their role in regulating an animal's metabolism and immunity. however, identifying repeatable associations between host physiological processes and their gut microbiota has proved challenging, in part because microbial communities often respond stochastically to host physiological stress (e.g. fasting, forced exercise or infection). migratory birds provide a valuable system in which to test host-microbe interactions under physiological extremes becaus ...201829111601
serologic evidence of exposure to highly pathogenic avian influenza h5 viruses in migratory shorebirds, australia.highly pathogenic avian influenza (hpai) h5nx viruses of the goose/guangdong/96 lineage continue to cause outbreaks in poultry and wild birds globally. shorebirds, known reservoirs of avian influenza viruses, migrate from siberia to australia along the east-asian-australasian flyway. we examined whether migrating shorebirds spending nonbreeding seasons in australia were exposed to hpai h5 viruses. we compared those findings with those for a resident duck species. we screened >1,500 blood samples ...201931538564
monitoring of heavy metal contaminants using feathers of shorebirds, korea.this study presents concentrations of iron, zinc, copper, lead and cadmium in the feathers of 3 shorebird species (n = 29) from okgu mudflat, korea in the east asian-australian migration flyways. lead concentrations (anova, p < 0.001) in red-necked stints (geomean = 9.61 μg g(-1) dry weight) were higher than in terek sandpipers (geomean = 5.56 μg g(-1) dry weight) which in turn were higher than in great knots (geomean = 2.78 μg g(-1) wet weight). cadmium concentrations (anova, p < 0.001) were hi ...201222223223
evaluation of the replication and pathogenicity of a variant avian paramyxovirus serotype 6 in mice.avian paramyxoviruses (apmvs) have been evaluated for their potential use as vaccine vectors, sparking research efforts leading to a better understanding of apmvs' replication and pathogenicity. however, within apmv serotypes, significant genetic diversity exists, and the infectivity of variant strains in mammals has not been studied. we utilized a mouse model to evaluate the pathogenicity of a variant strain of apmv-6 (apmv-6/red-necked stint/japan/8ks0813/2008) in comparison with the prototype ...201728685285
gut microbiota of a long-distance migrant demonstrates resistance against environmental microbe incursions.migratory animals encounter suites of novel microbes as they move between disparate sites during their migrations, and are frequently implicated in the global spread of pathogens. although wild animals have been shown to source a proportion of their gut microbiota from their environment, the susceptibility of migrants to enteric infections may be dependent upon the capacity of their gut microbiota to resist incorporating encountered microbes. to evaluate migrants' susceptibility to microbial inv ...201728815767
purifying selection and concerted evolution of rna-sensing toll-like receptors in migratory waders.migratory birds encounter a broad range of pathogens during their journeys, making them ideal models for studying immune gene evolution. despite the potential value of these species to immunoecology and disease epidemiology, previous studies have typically focused on their adaptive immune gene repertoires. in this study, we examined the evolution of innate immune genes in three long-distance migratory waders (order charadriiformes). we analysed two parts of the extracellular domains of two toll- ...201728528860
heavy metal concentrations in three shorebird species from okgu mudflat, gunsan, korea.iron, zinc, copper, lead, and cadmium were measured in livers of three shorebird species from okgu mudflat, korea in the east asian-australian migration flyways. iron concentrations in red-necked stints (calidris ruficollis) (geomean = 1,322 microg/g dw) were higher than in terek sandpipers (xenus cinereus) (467 microg/g dw), and great knots (calidris tenuirostris) (158 microg/g dw). copper concentrations in great knots (85.8 microg/g dw) were significantly higher than in red-necked stints (15.9 ...200918763038
acute and/or chronic contaminations of heavy metals in shorebirds from korea.zinc, copper, lead and cadmium were measured in the livers, kidneys and bones of terek sandpipers (xenus cinereus), great knots (calidris tenuirostris) and red-necked stints (calidris ruficollis) from the okgu mudflat, korea. zinc concentrations in bones were significantly higher in terek sandpipers than the other two species and differed among tissues in terek sandpipers. copper concentrations in kidneys and bones but not livers differed among species. copper concentrations in terek sandpipers ...201020603672
discovery of maritrema obstipum (digenea: microphallidae) from migratory birds in korea.adults of maritrema obstipum (digenea: microphallidae) were found in the intestines of 4 species of migratory birds, including the sanderling (crocethia alba), kentish plover (charadrius alexandrines), mongolian plover (charadrius mongolus), and red-necked stint (calidris ruficollis), collected from yubu island, chungcheongnam-do, korea. the worms of were 451 × 265 µm in size, and were easily identifiable as maritrema species by the presence of the cirrus sac, and the ring-like distribution of t ...201122355219
discovery of endocotyle incana and spelotrema pseudogonotyla (digenea: microphallidae) from scolopacid migratory birds in korea.migratory birds have been suspected as playing a central role in transmission of various trematodes, but few surveys have been undertaken in the republic of korea. in the present study, we describe new fauna of microphallid flukes in korea. two species of microphallids were found in the intestines of 2 migratory bird species, namely the red necked stints (calidris ruficollis) and the terek sandpiper (xenus cinereus), in a coastal area of gunsan-si, jeollabuk-do. the microphallids recovered from ...201222949760
nereidid polychaetes as the major diet of migratory shorebirds on the estuarine tidal flats at fujimae-higata in japan.the dietary items of five migratory shorebirds, dunlin (calidris alpina), red-necked stint (c. ruficollis), grey plover (pluvialis squatarola), whimbrel (numenius phaeopus) and black-headed gull (larus ridibundus), were examined by analyses of fecal droppings during the birds' migration or wintering and by surveys of macrobenthic fauna around their foraging sites on the tidal flats of fujimae-higata, nagoya, central japan. body parts of nereidid, capitellid, and spionid polychaetes and crustacea ...200717824775
surveillance of charadriiformes in northern australia shows species variations in exposure to avian influenza virus and suggests negligible virus prevalence.the virologic surveillance of 4248 charadriiformes since 1992 primarily from coastal northwest australia did not detect any evidence of avian influenza virus (aiv) excretion (test prevalence = 0%; 95% confidence interval [ci]: 0%-0.09%). past exposure to aiv was evident from serologic testing using nucleoprotein (np) competitive-elisa (c-elisa) with an overall seroprevalence of 8.8% (95% ci: 8%-9.7%). the c-elisa seroprevalence of family scolopacidae and genus numenius was significantly higher w ...201425055621
[community composition, seasonal dynamics and interspecific correlation of waterbirds in the qiantangjiang river estuary and hangzhou bay].waterbird surveys were conducted regularly in the qiantangjiang river estuary and hangzhou bay from july 2007 to november 2011. a total of 128 species (nine orders and 18 families) were recorded, including 119 migrants which accounted for 93% of the total species; eleven species were listed as national protected species. inter-specific correlation analysis for 13 shorebird populations and nine duck populations recorded over time found that 21 pairs of shorebirds and 23 pairs of ducks were correl ...201122184022
H4N8 subtype avian influenza virus isolated from shorebirds contains a unique PB1 gene and causes severe respiratory disease in mice.H4N8 subtype avian influenza viruses were isolated from shorebirds in eastern Hokkaido. All the isolates shared >99.7% nucleotide homology, and all the viral genes except for PB1 were highly related to those of A/red-necked stint/Australia/1/04. Thus, the isolates were regarded as PB1 reassortants. The most similar PB1 gene was identified in A/mallard/New Zealand/1615-17/04 (H4N6) with nucleotide homology of 90.9%. BALB/c mice intranasally inoculated with the H4N8 isolates developed severe respi ...201122192630
isolation of avian influenza viruses from two different transhemispheric migratory shorebird species in australia.shorebirds on their southerly migration from siberia to australia, may pass through asian regions currently experiencing outbreaks of highly pathogenic h5n1 influenza. to test for the presence of avian influenza viruses in migratory shorebirds arriving in australia during spring 2004, 173 cloacal swabs were collected from six species. ten swabs were positive for influenza a, with h4n8 viruses detected in five red-necked stints and h11n9 viruses detected in five sharp-tailed sandpipers. no h5n1 v ...200616732420
genetic diversity of avian paramyxovirus type 6 isolated from wild ducks in the republic of korea.eleven avian paramyxovirus type 6 (apmv-6) isolates from eurasian wigeon ( n=5; anas penelope), mallards ( n=2; anas platyrhynchos), and unknown species of wild ducks ( n=4) from korea were analyzed based on the nucleotide (nt) and deduced amino acid (aa) sequences of the fusion (f) gene. fecal samples were collected in 2010-2014. genotypes were assigned based on phylogenetic analyses. our results revealed that apmv-6 could be classified into at least two distinct genotypes, g1 and g2. the open ...201829517403
characterization of a genetic and antigenic variant of avian paramyxovirus 6 isolated from a migratory wild bird, the red-necked stint (calidris ruficollis).a hemagglutinating virus (8ks0813) was isolated from a red-necked stint. hemagglutination inhibition and neutralization tests indicated that 8ks0813 was antigenically related to a prototype strain, apmv-6/duck/hong kong/18/199/77, but with an 8- and 16-fold difference, respectively, in their titers. the full genome sequence of 8ks0813 showed 98.6 % nucleotide sequence identity to that of apmv-6/duck/italy/4524-2/07, which has been reported to belong to an apmv-6 subgroup, and showed less similar ...201425000900
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