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Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
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Alphavirus Identification in Neotropical Bats.

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Bats in Uruguay were found to carry two alphaviruses: Río Negro virus (RNV) and eastern equine encephalitis virus (EEEV). This research highlights bats

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Area of Science:

  • Virology
  • Mammalogy
  • Ecology

Background:

  • Alphaviruses (Togaviridae) are significant arthropod-borne viruses causing emerging zoonotic diseases.
  • Bats, a highly diverse mammalian group, are known to harbor numerous viruses, but their role in arbovirus transmission cycles is not fully understood.
  • Limited data exists on arbovirus infections in South American bat species.

Purpose of the Study:

  • To investigate the presence of alphaviruses in bats in Northern Uruguay.
  • To elucidate the potential role of bats in the natural transmission cycles of alphaviruses.

Main Methods:

  • Genomic detection and identification of alphaviruses from oral swabs of bats.
  • Phylogenetic analysis to identify specific alphavirus strains.
  • Sampling conducted on bats captured in Northern Uruguay.

Main Results:

  • Detection of Río Negro virus (RNV) in Tadarida brasiliensis and Myotis spp. bats.
  • Identification of eastern equine encephalitis virus (EEEV) in Myotis spp. bats.
  • Findings suggest RNV and EEEV may be circulating in enzootic cycles, previously detected in local mosquitoes and horse serology.

Conclusions:

  • Bats in Uruguay are susceptible to infection by RNV and EEEV.
  • Chiropterans may play a role in alphavirus natural cycles, potentially as amplifiers or dead-end hosts.
  • Further research is necessary to fully define the role of bats in the biological cycle of these alphaviruses.