Novel bat adenoviruses with an extremely large E3 gene

Area of Science:

• Virology
• Genomics
• Zoonotic Diseases

Background:

• Bats harbor diverse RNA viruses with implications for human health.
• Knowledge of bat-borne DNA viruses, including adenoviruses, is limited.
• Understanding bat virus diversity is crucial for public health.

Purpose of the Study:

• To isolate and characterize novel adenoviruses from Rhinolophus sinicus bats.
• To investigate the genetic diversity and taxonomic placement of new bat adenoviruses.
• To assess the cell tropism and potential host range of these novel viruses.

Main Methods:

• Virus isolation and genomic sequencing from bat samples.
• Phylogenetic and taxonomic analyses of viral genomes.
• Cell susceptibility assays to determine host range.

Main Results:

• Three novel bat adenoviruses (BtAdV WIV9-11) were identified.
• Genomes are similar to each other but distinct from known adenoviruses, with unusually large E3 genes.
• Phylogenetic analysis places them as a distinct species within the Mastadenovirus genus.
• Broad cell tropism observed, suggesting a wide potential host range.

Conclusions:

• The discovery expands the known genetic diversity of bat adenoviruses.
• These novel adenoviruses represent a distinct species within the Mastadenovirus genus.
• The broad cell tropism indicates a potential for zoonotic transmission.