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1. SARS-CoV-2 Infection in Beaver Farm, Mongolia, 2021

Author

Takemura, Taichiro, Ankhanbaatar, Ulaankhuu, Settypalli, Tirumala Bharani K., Purevtseren, Dulam, Shura, Gansukh, Damdinjav, Batchuluun, Ali, Hatem Ouled Ahmed Ben, Dundon, William G., Cattoli, Giovanni, and Lamien, Charles E.

Subjects
Nuclear energy -- Health aspects, Genomics -- Health aspects, Infection -- Health aspects, Disease transmission -- Health aspects, Health, International Atomic Energy Agency
Abstract

The COVID-19 pandemic that began in 2019 remains uncontained, and fatalities and multiple waves of infection continue to occur worldwide (1). The causative agent, SARS-CoV-2, has been detected in humans [...]

Published
2024
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6. A region-wide analysis of ENSO and its effect on dengue in Southeast Asia

Author

Seposo, Xerxes Tesoro, primary, Ith, Sophearen, additional, Madaniyazi, Lina, additional, Ng, Chris Fook Sheng, additional, Apostol, Geminn Louis, additional, Tantrakarnapa, Kraichat, additional, Kliengchuay, Wissanupong, additional, Dhewantara, Pandji Wibawa, additional, Hod, Rozita, additional, Hassan, Mohd Rohaizat, additional, Othman, Hidayatulfathi, additional, Lim, Jue Tao, additional, Nghia, Ngu Duy, additional, Tuan, Nguyen Hai, additional, Nhung, Ha Hong, additional, Nouhak, Inthavong, additional, Takemura, Taichiro, additional, Hasebe, Futoshi, additional, and Hashizume, Masahiro, additional

Published
2023
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7. Severe Acute Respiratory Syndrome Coronavirus 2 Shedding by Travelers, Vietnam, 2020

Author

Le, Thi Quynh Mai, Takemura, Taichiro, Moi, Meng Ling, Nabeshima, Takeshi, Nguyen, Le Khanh Hang, Hoang, Vu Mai Phuong, Ung, Thi Hong Trang, Le, Thi Thanh, Nguyen, Vu Son, Pham, Hong Quynh Anh, Duong, Tran Nhu, Nguyen, Hai Tuan, Ngu, Duy Nghia, Nguyen, Cong Khanh, Morita, Kouichi, Hasebe, Futoshi, and Dang, Duc Anh

Subjects
Severe acute respiratory syndrome -- Health aspects, Disease transmission -- Health aspects, Coronaviruses -- Health aspects, Travelers -- Health aspects, Medical research -- Health aspects, COVID-19 -- Health aspects, Health
Abstract

During the past 2 months, emergence of 2019 novel coronavirus disease (COVID-19) has caused global public health concern (1,2). In light of the rapid global expansion of the disease, we [...]

Published
2020

9. Genomic characterization of endemic diarrheagenic Escherichia coli and Escherichia albertii from infants with diarrhea in Vietnam

Author

Iguchi, Atsushi, primary, Takemura, Taichiro, additional, Ogura, Yoshitoshi, additional, Nguyen, Thi Thu Huong, additional, Kikuchi, Taisei, additional, Okuno, Miki, additional, Tokizawa, Asako, additional, Iwashita, Hanako, additional, Pham, Hong Quynh Anh, additional, Doan, Thi Hang, additional, Tran, Na Ly, additional, Tran, Thi Luong, additional, Nguyen, Thi Hang, additional, Tran, Thi Hien, additional, Pham, Tuyet Ngoc Linh, additional, Dao, Trung Duc, additional, Vu, Thi My Hanh, additional, Nguyen, Thi Nga, additional, Vu, Hieu, additional, Nguyen, Van Trang, additional, Vu, Thi Thu Huong, additional, Le, Thanh Huong, additional, Lai, Tuan Anh, additional, Ngo, Tuan Cuong, additional, Hasebe, Futoshi, additional, Nguyen, Dong Tu, additional, and Yamashiro, Tetsu, additional

Published
2023
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10. Comparison of the Whole-Genome Sequence of the African Swine Fever Virus from a Mongolian Wild Boar with Genotype II Viruses from Asia and Europe.

Author

Ankhanbaatar, Ulaankhuu, Auer, Agathe, Ulziibat, Gerelmaa, Settypalli, Tirumala B. K., Gombo-Ochir, Delgerzul, Basan, Ganzorig, Takemura, Taichiro, Tseren-Ochir, Erdene-Ochir, Ouled Ahmed, Hatem, Meki, Irene Kasindi, Datta, Sneha, Soumare, Baba, Metlin, Artem, Cattoli, Giovanni, and Lamien, Charles E.

Subjects
AFRICAN swine fever, AFRICAN swine fever virus, WILD boar, SWINE mortality, GENOTYPES, SWINE
Abstract

African swine fever (ASF) is a highly contagious and severe viral hemorrhagic disease in domestic and wild pigs. ASF seriously affects the global swine industry as the mortality rate can reach 100% with highly virulent strains. In 2007, ASF was introduced into the Caucasus and spread to Russia and later into other European and Asian countries. This study reported the first whole-genome sequence (WGS) of the ASF virus (ASFV) that was detected in a Mongolian wild boar. This sequence was then compared to other WGS samples from Asia and Europe. Results show that the ASFV Genotype II from Mongolia is similar to the Asian Genotype II WGS. However, there were three nucleotide differences found between the Asian and European genome sequences, two of which were non-synonymous. It was also observed that the European Genotype II ASFV WGS was more diverse than that of the Asian counterparts. The study demonstrates that the ASFV Genotype II variants found in wild boars and domestic pigs are highly similar, suggesting these animals might have had direct or indirect contact, potentially through outdoor animal breeding. In conclusion, this study provides a WGS and mutation spectrum of the ASFV Genotype II WGS in Asia and Europe and thus provides important insights into the origin and spread of ASFV in Mongolia. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Additional file 1 of Whole-genome analysis of a Vibrio cholerae O1 biotype classical strain isolated in 1946 in Sasebo city, Nagasaki prefecture, from a returnee from the northeast part of China

Author

Kuninobu, Ken-Ichiro, Takemura, Taichiro, Takizawa, Yu, Hasebe, Futoshi, and Yamashiro, Tetsu

Abstract

Additional file 1: Fig. S1. The 94,615 bp fragment present in V. cholerae O1 biotype classical O395 but not in the Man 9 genome is depicted. Ninety-five CDSs are present in the fragment. Fig. S2. Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses on the unique CDSs in two chromosomes carried by each strain Man9 and O395 were made. Thirty-five CDSs are unique to Man9, whereas 124 CDSs are unique to O395. Fig. S3. Profile of the Restriction Fragment Length Polymorphism (RFLP) with Southern blotting. The genome of O395 (Lane 1) and Man9 (Lane 2) were digested with BglI and visualized with zot- and ctxA—specific probes. M molecular marker. Fig. S4. PCR with the primer pair of TLC3F plus RTX5R and CIIF plus CIIR was applied on the genomic DNA extracted from Man9. An approx. 7.5 and 9.8 kb fragments were produced in separate reactions, estimated to contain the CTX prophage region on the Chr1, and the Chr2, respectively. The 9.8 kb product was further fragmented into three fragments; a 2.7 kb fragment with CIIF and rstBR primers; a 1 kb fragment with rstBF and rstRR primers; and a 6.6 kb fragment with rstRF and CIIR primers by PCR. The best-estimated configuration of the CTX prophage region, a CTXcla on the Chr1 and a CTXclaTrunc-CTXcla stretch on the Chr2, carried by Vibrio cholerae O1 biotype classical strain Man9 is shown.

Published
2023
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12. Additional file 2 of Whole-genome analysis of a Vibrio cholerae O1 biotype classical strain isolated in 1946 in Sasebo city, Nagasaki prefecture, from a returnee from the northeast part of China

Author

Kuninobu, Ken-Ichiro, Takemura, Taichiro, Takizawa, Yu, Hasebe, Futoshi, and Yamashiro, Tetsu

Abstract

Additional file 2: Table S1. The List of V. cholerae O1 biotype classical strains (24 strains), biotype El Tor strains (11 strains), and a V. cholerae non O1, non O139 strain used to construct a phylogenetic tree.

Published
2023
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14. Emergence of plasmid-mediated RND-type efflux pump gene cluster tmexCD-toprJ in Shewanella xiamenensis in a water environment

Author

Dao, Trung Duc, primary, Takemura, Taichiro, additional, Kasuga, Ikuro, additional, Hirabayashi, Aki, additional, Nga, Nguyen Thi, additional, Anh, Pham Hong Quynh, additional, Tu, Nguyen Dong, additional, Trang, Le Thi, additional, Tran, Hoang Huy, additional, Shibayama, Keigo, additional, Hasebe, Futoshi, additional, and Suzuki, Masato, additional

Published
2022
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15. Genomic dissection of the Vibrio cholerae O-serogroup global reference strains: reassessing our view of diversity and plasticity between two chromosomes

Author

Murase, Kazunori, primary, Arakawa, Eiji, additional, Izumiya, Hidemasa, additional, Iguchi, Atsushi, additional, Takemura, Taichiro, additional, Kikuchi, Taisei, additional, Nakagawa, Ichiro, additional, Thomson, Nicholas R., additional, Ohnishi, Makoto, additional, and Morita, Masatomo, additional

Published
2022
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19. Bài 4

Author

Thuong, Nguyen Thi, primary, Takemura, Taichiro, additional, Anh, Nguyen Phuong, additional, Dung, Nguyen Thi Kim, additional, Hien, Tran Thi, additional, and Dat, Do Tuan, additional

Published
2022
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20. National Institute of Health

Author

Luz, Mark Anthony de Vera, Nabeshima, Takeshi, Moi, Meng Ling, Dimamay, Maria Terrese Alonzo, Pangilinan, Lady-Anne Suarez, Dimamay, Mark Pierre Sijo, Matias, Ronald Roll, Mapua, Cynthia Abad, Buerano, Corazon Cerilla, de, Guzman Ferdinand, Tria, Edith Sangalang, Natividad, Filipinas Florendo, Daroy, Maria Luisa de Guzman, Takemura, Taichiro, Hasebe, Futoshi, and Morita, Kouichi

Subjects
viruses, Philippines, genotype, virus diseases, emergence, serotype, biochemical phenomena, metabolism, and nutrition, dengue
Abstract

engue remains a major public health problem in the Philippines. In this study, we determined the circulating dengue serotypes in the Philippines during the 2015?2017 outbreaks using a total of 678 serum samples from 537 individual dengue patients. Following an increase in the number of DENV-4 patients in recent years, we conducted a comprehensive molecular and epidemiology analysis on the DENV-4 strains isolated recently in the Philippines. Two genotypes of DENV-4 have been isolated in the Philippines since 1956: GI and GIIa. The GIIa DENV strains that were isolated in the present study were closely related to a distinct group of GIIa strains that were isolated from the Philippines in 2004. A majority of the isolates of this sub-group have been identified in the Philippines, suggesting that this lineage may have been introduced in the Philippines, and evolved to form the distinct sub-group within GIIa strains. The increase in DENV-4 activity also coincided with the appearance of the GIIa sub-group and the phasing-out of the GI lineage in the Philippines. Overall, our study demonstrates a shift in DENV-4 genotype and epidemic dynamics in a hyperendemic region, suggesting the importance of DENV genetic evolution in establishing and sustaining transmission.

Published
2019

22. Discrepancies in Infectivity of Flavivirus and SARS-CoV-2 Clinical Samples: An Improved Assay for Infectious Virus Shedding and Viremia Assessment

Author

Fukuta, Mizuki, primary, Nguyen, Co Thach, additional, Nguyen, Thi Thu Thuy, additional, Nguyen, Thi Thanh Ngan, additional, Vu, Thi Bich Hau, additional, Takemura, Taichiro, additional, Nguyen, Le Khanh Hang, additional, Inoue, Shingo, additional, Morita, Kouichi, additional, Le, Thi Quynh Mai, additional, Hasebe, Futoshi, additional, and Moi, Meng Ling, additional

Published
2021
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25. Discrepancies in Infectivity of Flavivirus and SARS-CoV-2 Clinical Samples: An Improved Assay for Infectious Virus Shedding and Viremia Assessment

Author

Fukuta, Mizuki, Nguyen, Co Thach, Nguyen, Thi Thu Thuy, Nguyen, Thi Thanh Ngan, Vu, Thi Bich Hau, Takemura, Taichiro, Nguyen, Le Khanh Hang, Inoue, Shingo, Morita, Kouichi, Le, Thi Quynh Mai, Hasebe, Futoshi, Moi, Meng Ling, Fukuta, Mizuki, Nguyen, Co Thach, Nguyen, Thi Thu Thuy, Nguyen, Thi Thanh Ngan, Vu, Thi Bich Hau, Takemura, Taichiro, Nguyen, Le Khanh Hang, Inoue, Shingo, Morita, Kouichi, Le, Thi Quynh Mai, Hasebe, Futoshi, and Moi, Meng Ling

Abstract

Infectivity and neutralizing antibody titers of flavivirus and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are frequently measured using the conventional plaque assay. While the assay is useful in the determination of infectivity, conventional plaque assays generally possess lower sensitivity and are time-consuming compared to nucleic acid amplification tests. In this study, a microcrystalline cellulose (MCC), Avicel, was evaluated as an alternative to the conventional virus overlay medium, methylcellulose, for a plaque assay. The plaque assay was performed using dengue and COVID-19 clinical samples and laboratory-established flavivirus and SARS-CoV-2 strains. In virus titration of clinical samples, the plaques were significantly larger, and the virus titers were higher when Avicel MCC-containing overlay medium was used than with conventional methylcellulose overlay medium. In addition, for some clinical samples and laboratory virus strains, infectious particles were detected as plaques in the Avicel MCC-containing medium, but not in the conventional methylcellulose medium. The results suggest that the viremia titer determined using the new overlay medium containing Avicel MCC may better reflect the innate infectious and plaque-forming capabilities of clinical samples and better reflect virus infectivity., International Journal of Environmental Research and Public Health, 18(18), art. no. 9845; 2021

Published
2021

27. Comparative analyses of CTX prophage region of Vibrio cholerae seventh pandemic wave 1 strains isolated in Asia

Author

Pham, Tho Duc, Nguyen, Tuan Hai, Iwashita, Hanako, Takemura, Taichiro, Morita, Kouichi, and Yamashiro, Tetsu

Subjects
seventh pandemic wave 1, Vibrio cholerae O1, phylogenetic tree, cholera toxin prophage
Abstract

Vibrio cholerae O1 causes cholera, and cholera toxin, the principal mediator of massive diarrhea, is encoded by ctxAB in the cholera toxin (CTX) prophage. In this study, the structures of the CTX prophage region of V. cholerae strains isolated during the seventh pandemic wave 1 in Asian countries were determined and compared. Eighteen strains were categorized into eight groups by CTX prophage region-specific restriction fragment length polymorphism and PCR profiles and the structure of the region of a representative strain from each group was determined by DNA sequencing. Eight representative strains revealed eight distinct CTX prophage regions with various combinations of CTX-1, RS1 and a novel genomic island on chromosome I. CTX prophage regions carried by the wave 1 strains were diverse in structure. V. cholerae strains with an area specific CTX prophage region are believed to circulate in South-East Asian countries; additionally, multiple strains with distinct types of CTX prophage region are co-circulating in the area. Analysis of a phylogenetic tree generated by single nucleotide polymorphism differences across 2483 core genes revealed that V. cholerae strains categorized in the same group based on CTX prophage region structure were segregated in closer clusters. CTX prophage region-specific recombination events or gain and loss of genomic elements within the region may have occurred at much higher frequencies and contributed to producing a panel of CTX prophage regions with distinct structures among V. cholerae pathogenic strains in lineages with close genetic backgrounds in the early wave 1 period of the seventh cholera pandemic., Microbiology and Immunology, 62(10), pp.635-650; 2018

Published
2018

29. Coxsackieviruses A6 and A16 associated with hand, foot, and mouth disease in Vietnam, 2008–2017: Essential information for rational vaccine design

Author

Hoa-Tran, Thi Nguyen, primary, Dao, Anh Thi Hai, additional, Nguyen, Anh The, additional, Kataoka, Chikako, additional, Takemura, Taichiro, additional, Pham, Chau Ha, additional, Vu, Hung Manh, additional, Hong, Ta Thi Thu, additional, Ha, Nguyen Thi Viet, additional, Duong, Tran Nhu, additional, Thanh, Nguyen Thi Hien, additional, and Shimizu, Hiroyuki, additional

Published
2020
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30. Genetic diversity of HIV type 1 in rural Eastern Cameroon

Author

Ndembi, Nicaise, Zekeng, Leopold, Ngansop, Charlotte, Kageyama, Seiji, Hayami, Masanori, Takehisa, Jun, Kobayashi, Eiji, Songok, Elijiah M., Ido, Eiji, Takemura, Taichiro, Ichimura, Hiroshi, and Kaptue, Lazare

Subjects
HIV (Viruses) -- Genetic aspects, HIV (Viruses) -- Varieties, Health
Abstract

The presence of genotypic HIV-1 variants circulating in eastern Cameroon from blood samples of 57 HIV-1-infected individuals attending 3 local health centers in the bordering rural villages with Central African Republic (CAR) collected and analyzed phylogenetically is monitored. The study showed that the findings strongly suggest that this part of Cameroon is a potential hotspot of HIV-1 recombination.

Published
2004

32. Detection of three independently-generated DS-1-like G9P[8] reassortant rotavirus A strains during the G9P[8] dominance in Vietnam, 2016–2018

Author

Hoa-Tran, Thi Nguyen, primary, Nakagomi, Toyoko, additional, Vu, Hung Manh, additional, Nguyen, Trang Thu Thi, additional, Takemura, Taichiro, additional, Hasebe, Futoshi, additional, Dao, Anh Thi Hai, additional, Anh, Pham Hong Quynh, additional, Nguyen, Anh The, additional, Dang, Anh Duc, additional, and Nakagomi, Osamu, additional

Published
2020
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33. Existence of Replication-Competent Minor Variants with Different Coreceptor Usage in Plasma from HIV-1-Infected Individuals

Author

Maeda, Yosuke, primary, Takemura, Taichiro, additional, Chikata, Takayuki, additional, Kuwata, Takeo, additional, Terasawa, Hiromi, additional, Fujimoto, Riito, additional, Kuse, Nozomi, additional, Akahoshi, Tomohiro, additional, Murakoshi, Hayato, additional, Tran, Giang Van, additional, Zhang, Yu, additional, Pham, Chau Ha, additional, Pham, Anh Hong Quynh, additional, Monde, Kazuaki, additional, Sawa, Tomohiro, additional, Matsushita, Shuzo, additional, Nguyen, Trung Vu, additional, Nguyen, Kinh Van, additional, Hasebe, Futoshi, additional, Yamashiro, Tetsu, additional, and Takiguchi, Masafumi, additional

Published
2020
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34. Prevalence of Zika virus neutralizing antibodies in healthy adults in Vietnam during and after the Zika virus epidemic season: a longitudinal population-based survey

Author

Nguyen, Co Thach, primary, Moi, Meng Ling, additional, Le, Thi Quynh Mai, additional, Nguyen, Thi Thu Thuy, additional, Vu, Thi Bich Hau, additional, Nguyen, Hai Tuan, additional, Pham, Thi Thu Hang, additional, Le, Thi Hien Thu, additional, Nguyen, Le Manh Hung, additional, Ly, Minh Huong Phu, additional, Ng, Chris Fook Sheng, additional, Takemura, Taichiro, additional, Morita, Kouichi, additional, and Hasebe, Futoshi, additional

Published
2020
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35. An Epidemic of Dengue Virus Serotype-4 during the 2015 - 2017: the Emergence of a Novel Genotype IIa of DENV-4 in the Philippines

Author

Luz, Mark Anthony de Vera, primary, Nabeshima, Takeshi, additional, Moi, Meng Ling, additional, Dimamay, Maria Terrese Alonzo, additional, Pangilinan, Lady-Anne Suarez, additional, Dimamay, Mark Pierre Sijo, additional, Matias, Ronald Roll, additional, Mapua, Cynthia Abad, additional, Buerano, Corazon Cerilla, additional, de Guzman, Ferdinand, additional, Tria, Edith Sangalang, additional, Natividad, Filipinas Florendo, additional, Daroy, Maria Luisa de Guzman, additional, Takemura, Taichiro, additional, Hasebe, Futoshi, additional, and Morita, Kouichi, additional

Published
2020
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36. Long-term surveillance needed to detect Zika virus outbreaks in endemic regions

Author

Thi Bich Hau Vu, Meng Ling Moi, Duc Anh Dang, T Thi Thuy Nguyen, Kouichi Morita, Takemura Taichiro, Shashika Lavangi Wijesooriya, Futoshi Hasebe, Co Thach Nguyen, and Thi Quynh Mai Le

Subjects
Infectious Diseases, Geography, biology, Outbreak, biology.organism_classification, Virology, Term (time), Zika virus
Published
2020

38. Whole genome characterization of feline-like G3P[8] reassortant rotavirus A strains bearing the DS-1-like backbone genes detected in Vietnam, 2016

Author

Hoa-Tran, Thi Nguyen, primary, Nakagomi, Toyoko, additional, Vu, Hung Manh, additional, Kataoka, Chikako, additional, Nguyen, Trang Thi Thu, additional, Dao, Anh Thi Hai, additional, Nguyen, Anh The, additional, Takemura, Taichiro, additional, Hasebe, Futoshi, additional, Dang, Anh Duc, additional, and Nakagomi, Osamu, additional

Published
2019
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39. Molecular epidemiology of Leptospira interrogans in Rattus norvegicus in Hanoi, Vietnam

Author

Koizumi, Nobuo, primary, Miura, Kozue, additional, Sanai, Yu, additional, Takemura, Taichiro, additional, Ung, Trang Thi Hong, additional, Le, Thanh Thi, additional, Hirayama, Kazuhiro, additional, Hasebe, Futoshi, additional, Nguyen, Hang Le Khanh, additional, Hoang, Phuong Vu Mai, additional, Nguyen, Cam Nhat, additional, Khong, Tuan Minh, additional, Le, Mai Thi Quynh, additional, Hoang, Ha Thi Thu, additional, and Ohnishi, Makoto, additional

Published
2019
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40. An Epidemic of Dengue Virus Serotype-4 during the 2015 - 2017: the Emergence of a Novel Genotype IIa of DENV-4 in the Philippines

Author

Luz, Mark Anthony de Vera, primary, Nabeshima, Takeshi, additional, Moi, Meng Ling, additional, Dimamay, Maria Terrese Alonzo, additional, Pangilinan, Lady-Anne Suarez, additional, Dimamay, Mark Pierre Sijo, additional, Matias, Ronald Roll, additional, Mapua, Cynthia Abad, additional, Buerano, Corazon Cerilla, additional, de Guzman, Ferdinand, additional, Tria, Edith Sangalang, additional, Natividad, Filipinas Florendo, additional, Daroy, Maria Luisa de Guzman, additional, Takemura, Taichiro, additional, Hasebe, Futoshi, additional, and Morita, Kouichi, additional

Published
2019
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42. A single amino acid substitution in the NS4B protein of Dengue virus confers enhanced virus growth and fitness in human cells in vitro through IFN-dependent host response

Author

Bui, Thuy Thu, primary, Moi, Meng Ling, additional, Nabeshima, Takeshi, additional, Takemura, Taichiro, additional, Nguyen, Trang Thu, additional, Nguyen, Linh Ngoc, additional, Pham, Hang Thi Thu, additional, Nguyen, Thi Thu Thuy, additional, Manh, Dao Huy, additional, Dumre, Shyam Prakash, additional, Mizukami, Shusaku, additional, Hirayama, Kenji, additional, Tajima, Shigeru, additional, Le, Mai Thi Quynh, additional, Aoyagi, Kiyoshi, additional, Hasebe, Futoshi, additional, and Morita, Kouichi, additional

Published
2018
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44. Vibrio cholerae embraces two major evolutionary traits as revealed by targeted gene sequencing

Author

Okada, Kazuhisa, primary, Wongboot, Warawan, additional, Chantaroj, Siriporn, additional, Natakuathung, Wirongrong, additional, Roobthaisong, Amonrattana, additional, Kamjumphol, Watcharaporn, additional, Maruyama, Fumito, additional, Takemura, Taichiro, additional, Nakagawa, Ichiro, additional, Ohnishi, Makoto, additional, and Hamada, Shigeyuki, additional

Published
2018
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45. Emergence of mobile tigecycline resistance gene tet(X4)-harbouring Shewanella xiamenensisin a water environment

Author

Dao, Trung Duc, Kasuga, Ikuro, Hirabayashi, Aki, Nguyen, Dong Tu, Tran, Hien Thi, Vu, Hieu, Pham, Linh Tuyet Ngoc, Vu, Thi My Hanh, Hasebe, Futoshi, Nguyen, Ha Thanh, Thi, Trang Le, Tran, Hoang Huy, Shibayama, Keigo, Takemura, Taichiro, and Suzuki, Masato

Abstract

Tigecycline resistance mediated by the mobile tigecycline-inactivating enzyme gene tet(X) in Gram-negative bacteria is an emerging concern for global public health. However, limited information is available on the distribution of tet(X) in the natural environment. In this study, we investigated the presence of tet(X) in environmental Gram-negative bacteria.

Published
2022
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46. Genetic diversity of environmental Vibrio cholerae O1 strains isolated in Northern Vietnam

Author

Takemura, Taichiro, primary, Murase, Kazunori, additional, Maruyama, Fumito, additional, Tran, Thi Luong, additional, Ota, Atsushi, additional, Nakagawa, Ichiro, additional, Nguyen, Dong Tu, additional, Ngo, Tu Cuong, additional, Nguyen, Thi Hang, additional, Tokizawa, Asako, additional, Morita, Masatomo, additional, Ohnishi, Makoto, additional, Nguyen, Binh Minh, additional, and Yamashiro, Tetsu, additional

Published
2017
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47. Comparative genome analysis of VSP-II and SNPs reveals heterogenic variation in contemporary strains of Vibrio cholerae O1 isolated from cholera patients in Kolkata, India

Author

Imamura, Daisuke, primary, Morita, Masatomo, additional, Sekizuka, Tsuyoshi, additional, Mizuno, Tamaki, additional, Takemura, Taichiro, additional, Yamashiro, Tetsu, additional, Chowdhury, Goutam, additional, Pazhani, Gururaja P., additional, Mukhopadhyay, Asish K., additional, Ramamurthy, Thandavarayan, additional, Miyoshi, Shin-ichi, additional, Kuroda, Makoto, additional, Shinoda, Sumio, additional, and Ohnishi, Makoto, additional

Published
2017
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48. Whole-genome analysis of a Vibrio choleraeO1 biotype classical strain isolated in 1946 in Sasebo city, Nagasaki prefecture, from a returnee from the northeast part of China

Author

Kuninobu, Ken-Ichiro, Takemura, Taichiro, Takizawa, Yu, Hasebe, Futoshi, and Yamashiro, Tetsu

Abstract

Background: Cholera is a water-borne disease caused by toxigenic Vibrio choleraeserogroups O1 and O139. Not a few studies on the whole-genome analyses of V. choleraeO1 biotype El Tor have been published; however, the number of analyses for biotype classical is limited. The whole-genome analysis was made on a V. choleraebiotype classical strain, Man9, isolated in 1946 in Sasebo city, Nagasaki prefecture, from a returnee from the northeast part of China. Methods: PacBio RSII was used to determine the whole-genome of Man9. De novo assemblies were made with CLC Genomics Workbench 8.5.1 and Canu. 2.0 and annotated by Prokka version 1.12. Upon determining the configuration of the CTX prophage region, combined procedures of PCR, RFLP with Southern blotting, and Sanger sequencing method were used. The phylogenetic tree was constructed by RaxML and visualized by Phandango. The identification of Cas genes and spacer sequences was made by CRISPR-finder and NCBI Blast search. These data were compared with those of V. choleraeserogroup O1 biotype classical O395. Results: The Man9 carried the 2.9 Mb (Chr1) and 1.1 Mb (Chr2) chromosomes with 2683 and 1198 CDSs, respectively. The genome similarity between Man9 and O395 was 97.0% when the total genomes were compared. Man9 carried a 380-kb inversion on the Chr1, and 95-kb and 35-kb fragments were not present on the Chr1 and on the Chr2, respectively. Man9 monophyletically clustered with 23 other biotype classical strains on the core gene phylogenetic tree analyses. Man9 carries “CTXcla” and a stretch of “truncated CTXcla-CTXcla” on the Chr1 and the Chr2, respectively, which is the opposite arrangement of O395. Man9 carries CRISPR–Cas system subtype I-E with 33 spacers, 64% of which were identical to those of O395. Conclusions: Man9 differs from O395 by 3% on the total genome comparison; however, genomic analysis of a strain having circulated in the interpandemic period between the 6th and the 7th cholera pandemic is valuable and contributes to understanding the evolution of pathogenic V. cholerae.

Published
2023
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50. Severe Acute Respiratory Syndrome Coronavirus 2 Shedding by Travelers, Vietnam, 2020.

Author

Thi Quynh Mai Le, Taichiro Takemura, Meng Ling Moi, Takeshi Nabeshima, Le Khanh Hang Nguyen, Vu Mai Phuong Hoang, Thi Hong Trang Ung, Thi Thanh Le, Vu Son Nguyen, Hong Quynh Anh Pham, Tran Nhu Duong, Hai Tuan Nguyen, Duy Nghia Ngu, Cong Khanh Nguyen, Kouichi Morita, Futoshi Hasebe, Duc Anh Dang, Le, Thi Quynh Mai, Takemura, Taichiro, and Moi, Meng Ling

Subjects
VIRAL pneumonia, VIRAL physiology, RESEARCH, COVID-19, TRAVEL, RESEARCH methodology, EVALUATION research, MEDICAL cooperation, COMPARATIVE studies, SYMPTOMS, EPIDEMICS, INFECTIOUS disease transmission
Abstract

We analyzed 2 clusters of 12 patients in Vietnam with severe acute respiratory syndrome coronavirus 2 infection during January-February 2020. Analysis indicated virus transmission from a traveler from China. One asymptomatic patient demonstrated virus shedding, indicating potential virus transmission in the absence of clinical signs and symptoms. [ABSTRACT FROM AUTHOR]

Published
2020
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