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Woo, Chanjin,Kwon, Jung-Hoon,Lee, Dong-Hun,Kim, Youngsik,Lee, Kwanghee,Jo, Seong-Deok,Son, Ki dong,Oem, Jae-Ku,Wang, Seung-Jun,Kim, Yongkwan,Shin, Jeonghwa,Song, Chang-Seon,Jheong, Weonhwa,Jeong, Jips Springer Vienna 2017 Archives of virology Vol.162 No.12
<P>We report the identification of a novel reassortant clade 2.3.4.4 H5N8 virus from a dead grey heron in Korea in 2017. Outbreaks of clade 2.3.4.4 H5 HPAIVs have been reported worldwide, and they have evolved into multiple genotypes among wild birds. Phylogenetic analysis indicated that this virus likely originated from Qinghai Lake and Western Siberia and further evolved through reassortment with Eurasian LPAI during the 2016 fall migration of wild birds. Enhanced surveillance and comparative genetic analysis will help to monitor the further evolution and dissemination of clade 2.3.4.4 HPAIVs.</P><P><B>Electronic supplementary material</B></P><P>The online version of this article (doi:10.1007/s00705-017-3547-2) contains supplementary material, which is available to authorized users.</P>
( Chanjin Woo ),( Seung-jun Wang ),( Jeonghwa Shin ),( Yongkwan Kim ),( Jae-ku Oem ),( Weonhwa Jheong ),( Jipseol Jeong ) 대한인수공통전염병학회 2016 창립총회 및 학술대회 초록집 Vol.2016 No.1
Introduction: Avian influenza viruses(AIVs) have caused considerable damage to the poultry industry and they pose a major public health hazard worldwide [1]. To controlof influenza, the use of antiviral therapy increased over the last decade, which results in higher concentrations of these substances in the environment [2]. This may cause selection pressure on existing virus populations and as a consequence, resistant mutants would be developed and existed as a part of natural population in wildbirds [2, 3].This study was undertaken to screen nucleotide sequences of the matrix(M) sequence gene of AIVs from wildbirds to identify any changes that might be associated with antiviral drug resistance, especially adamantane. In this study, forty virus isolates from wildbirds during the winter season of 2015-2016 were sequenced and compared withpublished data set from NCBI database. Materials and Methods: Viral RNA was extracted from allantoic fluid using a Viral Gene-Spin™ kit (Intron Biotechnology, Korea). The M gene segment was amplified using segment-specific primers with a One Step RT-PCR premix kit (Qiagen, USA) [4]. The PCR products were purified using a Qiagen gel extraction kit (Qiagen, USA) and the products were sequenced directly (Macrogen, Korea) with an ABI 3730XL Analyzer (Applied Biosystems, USA). Results: The forty viruses isolated from wild birds during the winter season of 2015-2016 have been confirmed different 14 genotypes. Phylogenetic analysis of the M gene showed that all isolates belonged to Eurasian lineage. Of these forty isolates, three isolates(7.5%) had V27I(two isolates)and S31N(one isolates) mutation known to reduce susceptibility to adamantane. In NCBI data set, contained 108 isolates from wild birdsin Korea from 2001 to 2015,three isolates(2.7%) carried V27I(two isolates) and S31N(one isolates, ) mutations. Comparison of the both data set showed that isolates identified in the winter season of 2015-2016 had higher proportion of mutants than those of NCBI sets, isolated in South Korea over past decade. Conclusion: It is uncertain whether these mutations are the result of natural variations in the AIVs orinduced by the selective pressure of antiviral drug. However,the detection of antiviral resistant mutants suggests importance of surveillance of AIVs in wild birds to understand the evolution of AIVs and to provide information about new emerged AIVs which might harmful to avians or humans. This research was funded by NIER. References [1]http://www.oie.int/animal-health-in-the-world/web-portal-on-avian-influenza/ (2016) [2] Fick J., Lindberg R.H., Tysklind M., et al. (2007) Antiviral oseltamiviris not removed or degraded in normal sewage water treatments: Implication for Development of Resistance by Influenza A virus. PLos ONE 2. [3]Orozovic G., Orozovic K.,Lennerstand J., et al.(2011)Detection of resistance mutation to antivirals oseltamivir and zanamivir in avian influenza A viruses isolated from wild birds. PLos ONE 6(1): e16028. [4]Hoffmann, E., Stech, J., Guan, Y., et al.(2001)Universal primer set for the full-length amplification of all influenza A viruses. Archives of virology 146, 2275-2289.
Surveillance of avian influenza virus from wild bird feces by using DNA barcoding
Chanjin Woo,Jeonghwa Shin,Seolhee Kim,Su Kil Lee,Moonsuk Hur,Hyen Mi Chung,Jae-Hwa Suh 한국조류학회II 2014 한국조류학회지 Vol.21 No.1
Analysis of fecal samples using DNA barcoding provides highly accurate and rapid avian influenza virus (AIV) surveillance, as well as host species identification. Does the revised text suitably convey the intended meaning? Please check and clarify.First, amplification of the cytochrome oxidase I (COI) DNA barcoding region by using PCR was optimized using fecal samples from wild birds (n = 170) collected from six natural habitats. After optimization, 2,143 fecal samples were collected from migratory bird habitats between December 2010 and February 2011. The M (matrix) and NP (nucleoprotein) genes of AIV were detected in the samples by using one-step RT-PCR. AIV viral sequences were detected in 93 fecal samples, and DNA barcoding was subsequently used to identify the bird species from 52 AIV-positive samples. The results of this study suggest that wild bird fecal samples can be utilized to predict the distribution of AIV in South Korean wild bird habitats, and that DNA barcoding can be used to identify the host species. Surveillance of AIV-infected birds will also increase the efficiency of high pathogenicity AIV monitoring.
권지윤(Ji-Yoon Kweon),김건우(Geon-Woo Kim),김정은(JeongEun Kim),권민우(Min-Woo Kwon),박찬진(ChanJin Park),한주호(Juho Han),김우현(Woo-Hyeon Kim),김지수(Ji-Soo Kim),노혜린(HyeRin Noh),정대원(Dae-Won Jeong),정경용(Kyungyong Chung) 한국정보기술학회 2024 Proceedings of KIIT Conference Vol.2024 No.5
현대 사회에서 건강에 대한 인식이 높아지면서 운동의 중요성이 강조되고 있지만, 많은 현대인들이 시간적, 경제적 제약으로 인해 충분히 운동을 하지 못하고 있다. 더욱이 잘못된 운동 자세는 부상을 초래할 수 있어 정확한 자세 유지가 필수적이다. 본 연구에서는 YOLOv8-pose를 활용한 운동 영상의 포즈 추정을 통해 사용자의 운동 자세를 정확히 파악하고 이를 통해 개인화된 운동 방법을 제안하는 프로그램을 개발하고자 한다. In modern society, as awareness of health increases, the importance of exercise is emphasized. However, many people are unable to exercise adequately due to time and economic constraints. Furthermore, incorrect exercise postures can lead to injuries, making it essential to maintain accurate poses. This study aims to develop a program that precisely identifies users exercise postures through pose estimation of exercise videos using YOLOv8-pose, and suggests personalized exercise methods based on this information.
SON, Kidong,KIM, Yong Kwan,WOO, Chanjin,WANG, Seung-Jun,KIM, Youngsik,OEM, Jae-Ku,JHEONG, Weonhwa,JEONG, Jipseol The Japanese Society of Veterinary Science 2018 The Journal of veterinary medical science Vol.80 No.3
<P>An outbreak of botulism occurred over a two-month period beginning July 20, 2016. In all, 697 wild birds were found paralyzed or dead at the Namdong reservoir and 11 Gong-gu. Using a mouse bioassay, type C botulinum toxin was identified in the bird serum, liquid cultures of soil samples, and maggot extracts. To minimize further infection of wild birds, we opened the floodgates of the Namdong reservoir adjacent to the Yellow Sea; this decreased the water temperature and the nutrient load such as nitrogen and phosphorus. The outbreak stopped shortly after taking these actions. It is not known if these efforts decreased the number of dead and diseased wild birds. Our study demonstrates one potential approach to minimize future botulism outbreaks among wild birds and their habitats.</P>
Development of 12 Meter Low Floor Fuel Cell Bus
Seo-Ho Choi,Soonil Jeon,Nam-Woo Lee,Sung-Jin Jung,Daejong Kim,Chanjin Nam,Kiho Yoo,Tae-Won Lim 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Hyundai Motor Company(HMC) developed a 12 meter long low floor fuel cell hybrid bus(FCB). For the main electric power source. the 160㎾ PEM fuel cell system. which generates only water vapor as a byproduct, was developed. As the weight of the bus is much heavier than that of passenger vehicle and the urban transit bus should decelerate and accelerate again at every bus stop. ultra-capacitor was developed as a secondary power source to maximize the amount of energy which captured during regenerative braking. The HMC’s FCB is the world first fuel cell bus that is hybridized with ultra-capacitor. A 240㎾ induction motor and an inverter were developed since they provide lower cost than PMSM(Permanent Magnet Synchronous Motor) and relatively high efficiency when the power rating is high. For the hydrogen storage system, type 2 high pressure tanks are used and they could carry 40 ㎏ of hydrogen and offer 300 ㎞ of driving range. HMC developed fuel cell system controller, vehicle controller, and hybrid controller, thus the bus can be driven in the near optimum conditions to improve the driving range. Four more FCB’s will be manufactured and driven on the road under the Korean govemment(MOCIE) funded fuel cell vehicle fleet program until 2009.
Molecular prevalence and genotyping of <i>Chlamydia</i> spp. in wild birds from South Korea
JEONG, Jipseol,AN, Injung,OEM, Jae-Ku,WANG, Seung-Jun,KIM, Yongkwan,SHIN, Jeong-Hwa,WOO, Chanjin,KIM, Youngsik,JO, Seong-Deok,SON, Kidong,LEE, Saemi,JHEONG, Weonhwa JAPANESE SOCIETY OF VETERINARY SCIENCE 2017 The Journal of veterinary medical science Vol.79 No.7
<P>Wild birds are reservoirs for <I>Chlamydia</I> spp. Of the total 225 samples from wild birds during January to September 2016 in Korea, 4 (1.8%) and 2 (0.9%) showed positive for <I>Chlamydia psittaci</I> and <I>Chlamydia gallinacea</I>, respectively. Phylogenetic analyses and comparisons of sequence identities for outer-membrane protein A (<I>omp</I>A) revealed that Korean <I>C. psittaci</I> fall into three previously known genotypes; genotype E, 1V and 6N, whereas the Korean <I>C. gallinacea</I> were classified as new variants of <I>C. gallinacea.</I> Our study demonstrates that wild birds in South Korea carry at least two <I>Chlamydia</I> species: <I>C. psittaci</I> and <I>C. gallinacea</I>, and provides new information on the epidemiology of avian chlamydiosis in wild birds.</P>