LETTERS

Novel -borne (S)–segment primer set (outer: OS- found by RT-PCR that used XSV- M55F, 5′-TAGTAGTAGACTCC-3′, specific primers. Hantavirus, and XSV-S6R, 5′-AGITCIGGRTC- Phylogenetic analyses was per- Vietnam CATRTCRTCICC-3′; inner: Cro- formed with maximum-likelihood 2F, 5′-AGYCCIGTIATGRGW- and Bayesian methods, and we used To the Editor: Compelling evi- GTIRTYGG-3′, and JJUVS-1233R, the GTR+I+Γ model of evolution, dence of genetically distinct hantavi- 5′-TCACCMAGRTGRAAGTGRT- as selected by the hierarchical like- ruses (family Bunyaviridae) in multi- CIAC-3. The bat was captured dur- lihood-ratio test in MrModel-test ple species of and moles (order ing July 2012 in Xuan Son National version 2.3 and jModelTest version Soricomorpha, families Soricidae and Park, a nature reserve in Thanh Sơn 0.1 (10), partitioned by codon po- ) across 4 continents (1–7) District, Phu Tho Province, ≈100 sition. Results indicated 4 distinct suggests that soricomorphs, rather km west of Hanoi (21°07′26.75′N, phylogroups, with XSV sharing a than rodents (order Rodentia, families 104°57′29.98′′E). common ancestry with MGBV (Fig- Muridae and Cricetidae), might be the For confirmation, RNA extrac- ure). Similar topologies, supported primordial hosts (6,7). Recently, the tion and RT-PCR were performed in- by high bootstrap (>70%) and poste- host range of hantaviruses has been dependently in a laboratory in which rior node (>0.70) probabilities, were further expanded by the discovery that hantaviruses had never been handled. consistently derived when various insectivorous (order Chiroptera) After initial detection, the L-segment algorithms and different taxa and also serve as reservoirs (8,9). Con- sequence was extended by using an- combinations of taxa were used. jecturing that Mouyassué virus in the other primer set (PHL-173F: 5′-GAT- Moreover, as we reported previous- pipistrelle ( nanus) WAAGCATGAYTGGTCTGA-3′; and ly, the incongruence between some in Côte d’Ivoire (8) and Magboi virus TNL-5084R: 5′-GATCCTGAARTA- hantaviruses and their reservoir hosts (MGBV) in the hairy split-faced bat CAATGTGCTGG-3′). To calculate might be indicative of host-switching (Nycteris hispida) in (9) the number of virus copies in tissues events (5–7). represent a much broader geographic by real-time RT-PCR, we used a virus- The striking sequence diver- distribution of bat-borne hantaviruses, specific primer set (XSV-F: 5′-GTT- gence of XSV presented considerable we analyzed tissues from bats cap- GCACAGCTTGGTATTGG-3′; and challenges for designing suitable tured in Mongolia and Vietnam. XSV-R: 5′-TTAGCACCCAAACCTC- primers for RT-PCR and sequencing. Total RNA was extracted from CAAG-3′) and probe (XSV-Probe: Also, sequencing efforts were con- 51 lung tissues, collected in RNA- 5′-ACAGCTCCTGGCATGGTA- strained by the limited availability later Stabilization Reagent (QIAGEN, AATTCTCC-3′). of tissues and concurrent virus isola- Valencia, CA, USA), from insectivo- Pairwise alignment and com- tion attempts. Consequently, we were rous bats, representing 7 genera and parison (with ClustalW, www. unable to obtain the full-length se- 12 species, captured in Mongolia and clustal.org) of a 4,582-nt (1,527 aa) quence of XSV. Similarly, the inabil- Vietnam. cDNA was then prepared by region of the RNA-dependent RNA ity to detect hantavirus RNA in tis- using PrimeScript II 1st strand cDNA polymerase–encoding L segment sues from other species of bats in this Synthesis Kit (Takara Bio, Otsu, Shi- indicated sequence similarities of study might be attributed to several ga, Japan) for reverse transcription 71.4%–71.5% and 75.9%–78.7% at factors, including the highly focal PCR (RT-PCR), and using oligonucle- the nucleotide and amino acid lev- nature of hantavirus infection, small otide primers previously designed for els, respectively, between XSV and sample sizes of bats of any given spe- amplification of soricid- and talpid- Mouyassué virus and MGBV. Se- cies, primer mismatches, and subop- borne hantaviruses (1–7). quence analysis of a 499-nt (166 aa) timal cycling conditions. A novel hantavirus, designated region of the nucleocapsid-encoding Bats of the genus Hipposideros, Xuan Son virus (XSV), was detected S segment showed that XSV differed family Hipposideridae, are among the in 1 of 5 Pomona roundleaf bats (Hip- by 42.8%–58.3% from representative most speciose insectivorous bats; ≈70 posideros pomona) by using a hemin- hantaviruses harbored by rodents and species are distributed across Africa, ested large (L)–segment primer set most soricomorphs. XSV sequences Europe, Asia, and Australia. Pomona (outer: HNL-2111F, 5′-CARTCWAC- were identical in lung, liver, kidney, roundleaf bats are frequently found in WGTIGGIGCIAGTGG-3′, and HAN- and spleen; and the highest number or near limestone or sandstone caves. L-R1, 5′-AACCADTCWGTYCCRT- of virus copies (7.6 × 101) was in Their colony sizes vary from few to CATC-3′; inner: HNL-2111F and lung tissue, determined by real-time many hundreds of individuals. The HAN-L-R2, 5′-GCRTCRTCWGART- RT-PCR. No additional hantavirus- vast geographic distribution of the GRTGDGCAA-3′) and a nested small infected Pomona roundleaf bats were Pomona roundleaf bat throughout

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Figure. Phylogenetic trees, based on 499-nt and 4,582-nt regions of the small (S) and large (L) genomic segments, respectively, of Xuan Son virus (XSV VN1982B4) (GenBank accession nos. S: KC688335, L: JX912953), generated by the maximum-likelihood and Bayesian Markov chain Monte Carlo estimation methods, under the GTR+I+Γ model of evolution. Because tree topologies were similar when RAxML and MrBayes were used, the tree generated by MrBayes was displayed. The phylogenetic position of XSV is shown in relation to chiropteran-borne hantaviruses, Mouyassué virus ([MOYV] JQ287716) from the banana pipistrelle and Magboi virus ([MGBV] JN037851) from the hairy slit-faced bat. The taxonomic identity of the XSV-infected Pomona roundleaf bat was confirmed by mitochondrial DNA analysis (GenBank accession no. JX912954). The numbers at each node are Bayesian posterior probabilities (>0.7), and the scale bars indicate nucleotide substitutions per site. Boldface indicates the Xuan Son virus detected in Pomona roundleaf bat, Vietnam. Representative soricomorph-borne hantaviruses include Thottapalayam virus ([TPMV] AY526097, EU001330) from the Asian house ; Imjin virus ([MJNV] EF641804, EF641806) from the Ussuri white-toothed shrew; Jeju virus ([JJUV] HQ663933, HQ663935) from the Asian lesser white-toothed shrew; Tanganya virus ([TGNV] EF050455, EF050454) from the Therese’s shrew; Azagny virus ([AZGV] JF276226, JF276228) from the West African pygmy shrew; Cao Bang virus ([CBNV] EF543524, EF543525) from the Chinese mole shrew; Ash River virus ([ARRV] EF650086, EF619961) from the masked shrew; Jemez Springs virus ([JMSV] FJ593499, FJ593501) from the dusky shrew; Seewis virus ([SWSV] EF636024, EF636026) from the Eurasian common shrew; Kenkeme virus ([KKMV] GQ306148, GQ306150) from the flat-skulled shrew; Qiandao Lake virus ([QDLV] GU566023, GU566021) from the stripe-backed shrew; Camp Ripley virus ([RPLV] EF540771) from the northern short-tailed shrew; Asama virus ([ASAV] EU929072, EU929078) from the ; Oxbow virus ([OXBV] FJ539166, FJ593497) from the American shrew mole; Rockport virus ([RKPV] HM015223, HM015221) from the ; and Nova virus ([NVAV] FJ539168, FJ593498) from the European common mole. Also shown are representative rodent-borne hantaviruses, including Hantaan virus ([HTNV] NC_005218, NC_005222), Soochong virus ([SOOV] AY675349, DQ562292), Dobrava- Belgrade virus ([DOBV] NC_005233, NC_005235), Seoul virus ([SEOV] NC_005236, NC_005238), Tula virus ([TULV] NC_005227, NC_005226), Puumala virus ([PUUV] NC_005224, NC_005225), Prospect Hill virus ([PHV] Z49098, EF646763), Andes virus ([ANDV] NC_003466, NC_003468), and Sin Nombre virus ([SNV] NC_005216, NC_005217).

Vietnam and in Bangladesh, Cam- intensive study at the time of their This work was supported in part by a bodia, China, India, Laos, Malaysia, discovery. However, insights into the grant-in-aid from the Ministry of Health, Myanmar, Nepal, and Thailand, pro- ecology and transmission dynamics Labor and Welfare of Japan (Research on vides opportunities to ascertain the of newfound bat-borne hantaviruses Emerging and Re-emerging Infectious Dis- genetic diversity and phylogeography might prepare us to more rapidly di- eases, Health Science Research Grants), of XSV and XSV-related hantavirus- agnose future outbreaks caused by the Japan Society for the Promotion of Sci- es. In this regard, although hantavi- emerging hantaviruses. ence (24405045), and the National Foun- rus RNA was not detected in archi- dation for Science and Technology Devel- ≈ opment of Vietnam (106.11-2012.02). val tissues from bats of 20 genera, Acknowledgments including several other Hipposideros We thank Hitoshi Suzuki, Shinichiro species (8,9), many more genetical- Kawada, and Kimiyuki Tsuchiya for sup- Satoru Arai, ly divergent hantavirus species are porting field investigations and offering Son Truong Nguyen, probably harbored by insectivorous helpful suggestions. Bazartseren Boldgiv, bats. Not all orphan viruses warrant Dai Fukui, Kazuko Araki,

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Can Ngoc Dang, (Urotrichus talpoides). Proc Natl Acad Sci and nausea/vomiting. Fever subsided Satoshi D. Ohdachi, U S A. 2008;105:16296–301. http://dx.doi. on the day of admission, but the patient org/10.1073/pnas.0808942105 Nghia Xuan Nguyen, 6. Kang HJ, Bennett SN, Sumibcay L, Arai was in shock (blood pressure 80/40 mm Tien Duc Pham, S, Hope AG, Mocz G, et al. Evolution- Hg) and had gastrointestinal bleeding Bazartseren Boldbaatar, ary insights from a genetically divergent and hematuria. Physical examination Hiroshi Satoh, hantavirus harbored by the European com- showed an obese, confused patient mon mole ( europaea). PLoS ONE. Yasuhiro Yoshikawa, 2009;4:e6149. http://dx.doi.org/10.1371/ with generalized petechiae and Shigeru Morikawa, journal.pone.0006149 hepatomegaly. The initial diagnosis Keiko Tanaka-Taya, 7. Kang HJ, Bennett SN, Hope AG, Cook was dengue shock syndrome (DSS). Richard Yanagihara, and JA, Yanagihara R. Shared ancestry be- The patient was intubated and received tween a mole-borne hantavirus and hanta- Kazunori Oishi viruses harbored by cricetid rodents. intravenous fluid infusion, packed Author affiliations: National Institute of In- J Virol. 2011;85:7496–503. http://dx.doi. red blood cells, ceftriaxone, sodium fectious Diseases, Tokyo, Japan (S. Arai, org/10.1128/JVI.02450-10 bicarbonate, and ranitidine before being 8. Sumibcay L, Kadjo B, Gu SH, Kang HJ, K. Araki, H. Satoh, S. Morikawa, K. Tana- transferred to King Chulalongkorn Lim BK, Cook JA, et al. Divergent lin- ka-Taya, K. Oishi); Institute of Ecology and eage of a novel hantavirus in the banana Memorial Hospital in Bangkok. The Biological Resources, Hanoi, Vietnam (S.T. pipistrelle (Neoromicia nanus) in Côte patient’s blood pressure increased to Nguyen, C.N. Dang, N.X. Nguyen, T.D. d’Ivoire. Virol J. 2012;9:34. http://dx.doi. 130/90 mm Hg after the initial fluid org/10.1186/1743-422X-9-34 Pham); National University of Mongolia, resuscitation (28 mL/kg free flow), and 9. Weiss S, Witkowski PT, Auste B, Ulaanbaatar, Mongolia (B. Boldgiv); Nation- Nowak K, Weber N, Fahr J, et al. Hanta- systolic pressure remained at ≈130 mm al Institute of Biological Resources, Seoul, virus in bat, Sierra Leone. Emerg In- Hg until transfer. South Korea (D. Fukui); Hokkaido Univer- fect Dis. 2012;18:159–61. http://dx.doi. Laboratory examinations found org/10.3201/eid1801.111026 3 sity, Sapporo, Japan (S.D. Ohdachi); Insti- 14,930 leukocytes/mm , hemoglobin 10. Posada D. jModelTest: phylogenetic model tute of Veterinary Medicine, Ulaanbaatar averaging. Mol Biol Evol. 2008;25:1253–6. 16.4 g/dL, hematocrit 48.2%, platelet (B. Boldbaatar); Chiba Institute of Science, http://dx.doi.org/10.1093/molbev/msn083 18,000/mm3, blood urea nitrogen 33 Chiba, Japan (Y. Yoshikawa); and Univer- mg/dL, creatinine 1 mg/dL, sodium sity of Hawaii at Manoa, Honolulu, Hawaii, Address for correspondence: Satoru Arai, 128 mEq/L, potassium 6.2 mEq/L, Infectious Disease Surveillance Center, National USA (R. Yanagihara) chloride 91 mEq/L, total CO2 5 Institute of Infectious Diseases, Toyama 1-23- mEq/L, total bilirubin 6.9 mg/dL, DOI: http://dx.doi.org/10.3201/eid1907.121549 1, Shinjuku, Tokyo 162-8640, Japan; email: direct bilirubin 3.9 mg/dL, aspartate [email protected] transaminase 3,507 IU/L, alanine References transaminase 2,775 IU/L, prothrombin 1. Klempa B, Fichet-Calvet E, Lecompte E, time 43 seconds (international Auste B, Aniskin V, Meisel H, et al. Novel normalized ratio 3.4), and partial hantavirus sequences in shrew, Guinea. thromboplastin time 93.5 s (control Emerg Infect Dis. 2007;13:520–2. http:// dx.doi.org/10.3201/eid1303.061198 28.7 s). Blood and urine cultures 2. Arai S, Song J-W, Sumibcay L, showed negative results. Serum was Bennett SN, Nerurkar VR, Parmenter Possible Cause of positive for IgM against DENV. C, et al. Hantavirus in northern short- Unfortunately, we did not investigate tailed shrew, United States. Emerg Liver Failure in Infect Dis. 2007;13:1420–3. http://dx.doi. Patient with other viral causes of liver failure. org/10.3201/eid1309.070484 DSS with liver failure was 3. Song J-W, Kang HJ, Song KJ, Truong Dengue Shock diagnosed and treated with TT, Bennett SN, Arai S, et al. Newfound intravenous fluid, sodium bicarbonate, hantavirus in Chinese mole shrew, Viet- Syndrome nam. Emerg Infect Dis. 2007;13:1784–7. omeprazole, fresh frozen plasma, http://dx.doi.org/10.3201/eid1311.070492 To the Editor: We report a rare platelet transfusion, vitamin K, and 4. Song J-W, Kang HJ, Gu SH, Moon SS, hepatic ultrasonograph finding for a recombinant factor VIIa concentrate Bennett SN, Song KJ, et al. Charac- patient with liver failure associated (NovoSeven; Novo Nordisk, terization of Imjin virus, a newly iso- lated hantavirus from the Ussuri white- with dengue virus (DENV) infection. Bagsvaerd, Denmark). Despite stable toothed shrew ( lasiura). This finding might shed light on the blood pressure over the next 6 days, J Virol. 2009;83:6184–91. http://dx.doi. pathogenesis of liver involvement in liver enzymes continued to rise with org/10.1128/JVI.00371-09 this disease. progressive jaundice (online Technical 5. Arai S, Ohdachi SD, Asakawa M, Kang HJ, Mocz G, Arikawa J, et al. In March 2006, a 10-year-old Appendix, wwwnc.cdc.gov/EID/ Molecular phylogeny of a newfound previously healthy boy was hospitalized article/19/7/12-1820-Techapp1.pdf). hantavirus in the Japanese shrew mole for a 3-day history of fever, headache, Hepatic ultrasonograph on the second

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