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Tsatsralt-Od B, Primadharsini PP, Nishizawa T, Ohnishi H, Nagashima S, Takahashi M, Jirintai S, Nyamkhuu D, Okamoto H. Distinct changing profiles of hepatitis A and E virus infection among patients with acute hepatitis in Mongolia: The first report of the full genome sequence of a novel genotype 1 hepatitis E virus strain. J Med Virol 2017; 90:84-92. [PMID: 28776712 DOI: 10.1002/jmv.24907] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 07/14/2017] [Indexed: 12/16/2022]
Abstract
In January 2012, Mongolia started a hepatitis A vaccination program, which has not yet been evaluated. The first occurrence of autochthonous acute hepatitis E in 2013, caused by genotype 4 hepatitis E virus (HEV), suggests the need for a routine study to monitor its prevalence. One hundred fifty-four consecutive patients who were clinically diagnosed with acute hepatitis between 2014 and 2015 in Ulaanbaatar, Mongolia were studied. By serological and molecular testing followed by sequencing and phylogenetic analysis, only one patient (0.6%) was diagnosed with acute hepatitis A, caused by genotype IA hepatitis A virus (HAV), and 32 (20.8%) patients were diagnosed with acute hepatitis E, caused by genotype 1 HEV. The 32 HEV isolates obtained in this study shared 99.5-100% nucleotide identity and were grouped into a cluster separated from those of subtypes 1a to 1f. Upon comparison of p-distances over the entire genome, the distances between one representative HEV isolate (MNE15-072) and 1a-1f strains were 0.071-0.137, while those between 1b and 1c were 0.062-0.070. In conclusion, the prevalence of acute hepatitis A has decreased in Mongolia since the start of the vaccination program, while the monophyletic genotype 1 HEV strain of a probably novel subtype has been prevalent.
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Affiliation(s)
- Bira Tsatsralt-Od
- National Center for Communicable Diseases, Ministry of Health, NCCD-Campus, Ulaanbaatar, Mongolia
| | - Putu Prathiwi Primadharsini
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
| | - Tsutomu Nishizawa
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
| | - Hiroshi Ohnishi
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
| | - Shigeo Nagashima
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
| | - Masaharu Takahashi
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
| | - Suljid Jirintai
- Division of Pathology, Department of Basic Veterinary Medicine, Inner Mongolia Agricultural University College of Veterinary Medicine, Hohhot, Inner Mongolia, China
| | - Dulmaa Nyamkhuu
- National Center for Communicable Diseases, Ministry of Health, NCCD-Campus, Ulaanbaatar, Mongolia
| | - Hiroaki Okamoto
- Division of Virology, Department of Infection and Immunity, Jichi Medical University School of Medicine, Shimotsuke, Tochigi, Japan
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Ogbolu DO, Alli OT, Odeleye I, Oluremi AS. High seroprevalence of asymptomatic viral haemoparasites among prospective blood donors in Nigeria. ASIAN PAC J TROP MED 2016; 9:658-61. [DOI: 10.1016/j.apjtm.2016.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 05/16/2016] [Accepted: 05/23/2016] [Indexed: 10/21/2022] Open
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