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Journal of General Virology header logo Journal of General Virology

Volume 105, Issue 9

Characterization of a mammalian orthoreovirus isolated from the large flying fox, in Indonesia No Access

Abstract

Fruit bats serve as an important reservoir for many zoonotic pathogens, including Nipah virus, Hendra virus, Marburg virus and Lyssavirus. To gain a deeper insight into the virological characteristics, pathogenicity and zoonotic potential of bat-borne viruses, recovery of infectious viruses from field samples is important. Here, we report the isolation and characterization of a mammalian orthoreovirus (MRV) from a large flying fox () in Indonesia, which is the first detection of MRV in Southeast Asia. MRV was recovered from faecal samples of three different in Central Java. Nucleotide sequence analysis revealed that the genome of the three MRV isolates shared more than 99% nucleotide sequence identity. We tentatively named one isolated strain as MRV12-52 for further analysis and characterization. Among 10 genome segments, MRV12-52 S1 and S4, which encode the cell-attachment protein and outer capsid protein, had 93.6 and 95.1% nucleotide sequence identities with known MRV strains, respectively. Meanwhile, the remaining genome segments of MRV12-52 were divergent with 72.9–80.7 % nucleotide sequence identities. Based on the nucleotide sequence of the S1 segment, MRV12-52 was grouped into serotype 2, and phylogenetic analysis demonstrated evidence of past reassortment events. characterization of MRV12-52 showed that the virus efficiently replicated in BHK-21, HEK293T and A549 cells. In addition, experimental infection of laboratory mice with MRV12-52 caused severe pneumonia with 75% mortality. This study highlights the presence of pathogenic MRV in Indonesia, which could serve as a potential animal and public health concern.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): fruit bats , Indonesia , mammalian orthoreovirus , viral pathogenicity and virus isolation
Funding
This study was supported by the:
  • Japan Science and Technology Corporation (Award JPMJMS2025)
    • Principle Award Recipient: YasukoOrba
  • Japan Agency for Medical Research and Development (Award JP23fk0108637)
    • Principle Award Recipient: YasukoOrba
  • Japan Agency for Medical Research and Development (Award JP223fa627005)
    • Principle Award Recipient: HirofumiSawa
  • Japan Society for the Promotion of Science London (Award 21K05951)
    • Principle Award Recipient: HirofumiSawa
  • Japan Society for the Promotion of Science London (Award 21K19619)
    • Principle Award Recipient: MichihitoSasaki
© 2024 The Authors
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/content/journal/jgv/10.1099/jgv.0.002028
2024-09-25
2025-04-30
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Characterization of a mammalian orthoreovirus isolated from the large flying fox, Pteropus vampyrus, in Indonesia
J. Gen. Virol. 105, 002028 (2024); https://doi.org/10.1099/jgv.0.002028
/content/journal/jgv/10.1099/jgv.0.002028
/content/journal/jgv/10.1099/jgv.0.002028
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