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Genetic relatedness of Antimicrobial resistant Campylobacter jejuni from Livestock
Jae-Uk An(Jae-Uk An),Woohyun Kim(Woohyun Kim),Junhyung Kim(Junhyung Kim),Hee-Jin Dong(Hee-Jin Dong),Hungwui Ho(Hungwui Ho),Jong-Hyun Kim(Jong-Hyun Kim),Seongbeom Cho(Seongbeom Cho) 한국예방수의학회 2018 한국예방수의학회 학술대회자료집 Vol.2018 No.-
Diversity of the Gastric Microbiota in Thoroughbred Racehorses Having Gastric Ulcer
( Hee-jin Dong ),( Hungwui Ho ),( Hyeshin Hwang ),( Yongbaek Kim ),( Janet Han ),( Inhyung Lee ),( Seongbeom Cho ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.4
Equine gastric ulcer syndrome is one of the most frequently reported diseases in thoroughbred racehorses. Although several risk factors for the development of gastric ulcers have been widely studied, investigation of microbiological factors has been limited. In this study, the presence of Helicobacter spp. and the gastric microbial communities of thoroughbred racehorses having mild to severe gastric ulcers were investigated. Although Helicobacter spp. were not detected using culture and PCR techniques from 52 gastric biopsies and 52 fecal samples, the genomic sequences of H. pylori and H. ganmani were detected using nextgeneration sequencing techniques from 2 out of 10 representative gastric samples. The gastric microbiota of horses was mainly composed of Firmicutes (50.0%), Proteobacteria (18.7%), Bacteroidetes (14.4%), and Actinobacteria (9.7%), but the proportion of each phylum varied among samples. There was no major difference in microbial composition among samples having mild to severe gastric ulcers. Using phylogenetic analysis, three distinct clusters were observed, and one cluster differed from the other two clusters in the frequency of feeding, amount of water consumption, and type of bedding. To the best of our knowledge, this is the first study to investigate the gastric microbiota of thoroughbred racehorses having gastric ulcer and to evaluate the microbial diversity in relation to the severity of gastric ulcer and management factors. This study is important for further exploration of the gastric microbiota in racehorses and is ultimately applicable to improving animal and human health.
전우진,동희진,신재훈,김일용,Hungwui Ho,오승현,윤영민,최양규,서준교,남기환,김형진,조성범,성제경 대한수의학회 2015 Journal of Veterinary Science Vol.16 No.4
A novel Helicobacter species was identified from the gastrointestinal tract of the Korean striped field mouse (Apodemus agrarius). Biochemical testing, ultrastructure characterization, and 16S rRNA gene sequence analysis suggested that this bacterium represents a distinct taxon. The bacterium was positive for urease activity, susceptible to cephalothin and nalidixic acid, and weakly positive for oxidase and catalase activity. Electron microscopy revealed that the bacterium has spirally curved rod morphology with singular bipolar nonsheathed flagella. Genotypically, the isolated bacterial strains (YMRC 000215, YMRC 000216, and YMRC 000419) were most closely related to a reference strain of Helicobacter mesocricetorum (97.25%, 97.32%, and 97.03% 16S rRNA sequence similarities, respectively). The 16S rRNA sequences of these strains were deposited into GenBank under accession numbers AF284754, AY009129, and AY009130, respectively. We propose the name Helicobacter apodemus for this novel species.