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우인옥 ( In Ohk Ouh ),서민구 ( Min Goo Seo ),장영술 ( Young Sul Jang ),김상윤 ( Sang Yun Kim ),곽동미 ( Dong Mi Kwak ) 한국동물위생학회 2013 韓國家畜衛生學會誌 Vol.36 No.4
This study was done to determine the seroprevalence of Coxiella burnetii in cattle with reproductive disorders reared in eastern Gyeongbuk province. A total of 146 cattle blood samples from 83 farms in eastern Gyeongbuk province were collected in 2011∼2012. Among them, 17 (11.6%) samples from 11 (13.3%) farms were seropositive for C. burnetii by ELISA. In dairy cattle with mastitis, 15 (38.5%) milk samples from 9 (42.9%) farms were seropositive among 39 milk samples from 21 farms. Among the seropositive farms, one farm with high seroprevalence was selected to assess the seroprevalence of C. burnetii in the bulk-tank milk (BTM) and blood samples of dairy cattle. The BTM sample from the farm was seropositive to C. burnetii and 6 (15%) out of 40 dairy cattle were seropositive. In cattle with reproductive disorders including infertility, abortion and stillbirth, 2 (1.9%) samples from 2 (3.2%) farms were positive among 107 samples collected from 62 farms. Among 2 positive samples, one of them is dariy cattle (100%) and the other is Korean cattle (0.9%) (P<0.001). This suggests that Korean cattle was relatively resistant to C. burnetii. Based on the data obtained, we identified association between C. burnetii shedding in milk and chronic subclinical mastitis in dairy cattle. Since seroprevalence of C. burnetii is relatively high in dairy cattle, further intensive studies on C. burnetii among the high risk milk farms and dairy cattle herds are needed to evaluate infection status.
우인옥 ( In Ohk Ouh ),서민구 ( Min Goo Seo ),도재철 ( Jae Cheul Do ),김인경 ( In Kyoung Kim ),조민희 ( Min Hee Cho ),곽동미 ( Dong Mi Kwak ) 한국동물위생학회 2013 韓國家畜衛生學會誌 Vol.36 No.4
Q fever is a rickettsial infection caused by Coxiella burnetii that is transmitted from animals to humans. Modes of transmission to humans include inhalation, tick bites and ingestion of unpasteurized milk or dairy products. This survey was aimed at monitoring the seroprevalence of C. burnetii in bulk-tank milk (BTM) in Gyeongbuk province. In addition, the seroprevalence of C. burnetii was investigated at the herd level of dairy cattle in eastern Gyeongbuk province in which many dairy cattle are reared. Among 324 BTM samples collected from 20 country areas, 175 (54%) BTM samples from 15 (75%) country areas were positive for C. burnetii by ELISA. By regions, the seroprevalence of BTM samples in eastern, central, western and northern areas of Gyeongbuk province were 62.7%, 48.4%, 45.1%, and 41.4%, respectively. When analyzed in the dairy cattle reared in the eastern area where high seroprevalence occurred in BTM samples, 119 (24.2%) out of 492 dairy cattle were positive for C. burnetii. Seroprevalence of C. burnetii in dairy cattle was increased with daily milk yield of farm (P<0.05) and age (P<0.001). Since seroprevalence of C. burnetii is relatively high in both BTM samples and dairy cattle reared in Gyeongbuk province, further studies on the high risk farms and herds are needed to evaluate infection status and appropriate control programs in this region.
Phylogeny and evolutionary genetics of porcine parvovirus from swine samples in Korea
In-Ohk Ouh(In-Ohk Ouh),Ju-Yeon Lee(Ju-Yeon Lee),Seyeon Park(Seyeon Park),Min-Su Cho(Min-Su Cho),Byeong Sul Kang(Byeong Sul Kang),Soo dong Cho(Soo dong Cho),In-Soo Cho(In-Soo Cho),Jae-Young Song(Jae-Yo 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-
Seroprevalence of the swine influenza A virus in domestic pigs in the Republic of Korea
In-Ohk Ouh,Seo Young Moon,Mi-Ja Park,Min Ji Kim,Min-Ho Seong,Jong-Sik Bak,Hyoung seok Yang,Hyeonhae Choi,Suyeong Yun,Bang-hun Hyun,Soo dong Cho,Yoon-Hee Lee,Choi-Kyu Park 한국예방수의학회 2020 예방수의학회지 Vol.44 No.3
Influenza A virus (IAV) causes respiratory disease in birds and mammals, including pigs and humans. Infection by IAV in pigs increases not only economic losses in the swine industry but also the emergence of novel IAV variants via gene reassortment, which is important due to the susceptibility of both birds and humans to IAV. This study provides serological data obtained during a study to detect IAV infections in pigs in the Republic of Korea during 2018 and 2019. A total of 1,559 samples were collected from 74 domestic pig farms. Hemagglutination inhibition (HI) assays were performed using the A/Swine/Korea/25-13(H1N1), A/Swine/Korea/E102 (H1N2), and A/Swine/Korea/Cy10/2007 (H3N2) viruses as antigens. The HI assay results showed that 266 of the 1,559 samples were seropositive (17.0%). Among these, H1N1, H1N2, and H3N2 comprised 7.3% (114), 6.0% (93), and 8.8% (137) of the 1,559 samples, respectively. Co-infections of H1N1/H1N2, H1N1/H3N2, H1N2/H3N2 and H1N1/H1N2/H3N2 were observed in 2.1% (31), 1.5% (23), 1.5% (24), and 0.8% (13) of the 1,559 samples, respectively. Interestingly, IAV infections were detected in all nine provinces of the country.
First detection and genetic characterization of porcine parvovirus 7 from Korean domestic pig farms
In-Ohk Ouh,박세연,Ju-Yeon Lee,송재영,조인수,Hye-Ryung Kim,Choi-Kyu Park 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.6
Porcine parvovirus 7 (PPV7) was first detected in Korean pig farms in 2017. The detection rate of PPV7 DNA was 24.0% (30/125) in aborted pig fetuses and 74.9% (262/350) in finishing pigs, suggesting that PPV7 has circulated among Korean domestic pig farms. Phylogenetic analysis based on capsid protein amino acid sequences demonstrated that the nine isolated Korean strains (PPV-KA1-3 and PPV-KF1-6) were closely related to the previously reported USA and Chinese PPV7 strains. In addition, the Korean strains exhibit genetic diversity with both insertion and deletion mutations. This study contributes to the understanding of the molecular epidemiology of PPV7 in Korea.
Production of recombinant VP2 protein of porcine parvovirus isolated in Korea
In-Ohk Ouh(In-Ohk Ouh),Ju-Yeon Lee(Ju-Yeon Lee),Min-Su Cho(Min-Su Cho),Byeong Sul Kang(Byeong Sul Kang),Seyeon Park(Seyeon Park),Soo dong Cho(Soo dong Cho),In-Soo Cho(In-Soo Cho),Jae Young Song(Jae Yo 한국예방수의학회 2017 한국예방수의학회 학술대회자료집 Vol.2017 No.-
Antibody responses after vaccination against equine influenza virus in the Republic of Korea in 2019
In-Ohk Ouh,Min Ji Kim,Hyeonhae Choi,Hyoung seok Yang,Sang Kyu Lee,Seo Young Moon,Suyeong Yun,Bang-hun Hyun,Soo dong Cho,Choi-Kyu Park,Yoon-Hee Lee 한국예방수의학회 2020 예방수의학회지 Vol.44 No.3
In this study, antibody responses after vaccination against equine influenza were investigated among 1,591 horses in the Republic of Korea using the hemagglutination inhibition (HI) test. Equine influenza has not occurred since 2011 and a commercial vaccine against H3N8 has been used. The equine influenza virus, A/equine/South Africa/4/03 (H3N8), was used as the antigen in the HI assay. The mean seropositive rate was 90.5% in 2019. Except for stallion whose seropositive rate was 78.5%, all seropositive rates of other horse types were over 90%. Regionally, except for Gangwon-do and Jeju-do whose seropositive rates were 89.0% and 87.1%, all seropositive rates in other provinces were over 90%. In the future, more through vaccination against equine influenza needs to be done based on this investigation result.
In-Ohk Ouh,Ju-Yeon Lee,Min-Soo Cho,Seyeon Park,Hyeonhae Choi,Seo Young Moon,Suyeong Yun,Jae Young Song,Bang-Hun Hyun,Yoon-Hee Lee,Choi-Kyu Park 한국예방수의학회 2020 예방수의학회지 Vol.44 No.3
Porcine parvovirus 2 (PPV2) was recently detected in the Republic of Korea. This paper reports two near-complete genome sequences of PPV2 identified for the first time in the lung tissue of aborted pig fetuses.
Focal cerebral ischemic injury decreases calbindin expression in brain tissue and HT22 cells
In-Ohk Ouh,Young-Min Kim,Phil-Ok Koh 한국실험동물학회 2013 Laboratory Animal Research Vol.29 No.3
Calbindin is a calcium binding protein that controls intracellular calcium levels and has a neuroprotective function against apoptotic stimuli. We investigated the expression of calbindin in ischemic brain injury. Focal cerebral ischemia was induced in male rats by middle cerebral artery occlusion (MCAO) and cerebral cortices were collected 24 h after MCAO. Cerebral ischemia significantly increased infarct volume. RT-PCR and Western blot analyses showed that MCAO injury induced a decrease of calbindin expression. Moreover, immunohistochemical staining showed that the number of calbindin-positive cells decreased in ischemic regions of MCAO-operated animals. In cultured hippocampal-derived cell lines, glutamate exposure increased intracellular Ca<SUP>2+</SUP> concentrations and decreased calbindin expression. Taken together, both in vivo and in vitro results demonstrated decreases of calbindin after neuronal cell injury. These results suggest that decreases of calbindin in ischemic brain injury contribute to neuronal cell death.
In-Ohk Ouh,Ju-Yeon Lee,Suyeong Yun,Hyeonhae Choi,Seo Young Moon,Min Ji Kim,Bang-hun Hyun,Yu-Ri Park,Jienny Lee,Yoon-Hee Lee,Choi-Kyu Park 한국예방수의학회 2021 예방수의학회지 Vol.45 No.2
In this study, the near-complete genome sequence of the novel reassortant H1N2 influenza A virus strain A/swine/Korea/KS60/2016 is reported. Sequences of the hemagglutinin (HA), neuraminidase (NA), and polymerase basic 2 (PB2) genes were analyzed, revealing that the isolates contain segments from previous Korean swine H1N2 strains. Additionally, the remaining genes of this strain originated from human H1N1 strains in 2009.