Meta-transcriptomic sequencing reveals divergent RNA viruses in geckos

Area of Science:

• Virology
• Herpetology
• Genomics

Background:

• Geckos are common reptiles, often living near humans, but their associated viral diversity remains largely unexplored.
• Understanding viral communities in geckos is crucial for reptile health and zoonotic disease surveillance.

Purpose of the Study:

• To identify and characterize novel RNA viruses in geckos.
• To investigate the evolutionary relationships between gecko viruses and their hosts.

Main Methods:

• Meta-transcriptomic sequencing was employed to discover novel viruses in gecko samples.
• Reverse transcription polymerase chain reaction (RT-PCR) was used to confirm the presence of identified viruses.
• Phylogenetic and co-phylogeny analyses were conducted to determine viral lineages and host-jumping events.

Main Results:

• Four novel RNA viruses were identified: Gecko astrovirus, Gecko parechovirus, Gecko reptillovirus, and Gecko hartmanivirus.
• These viruses form distinct, gecko-specific lineages, genetically divergent from known relatives.
• Phylogenetic analysis revealed a mix of co-divergence and host jumping in virus-host evolution.

Conclusions:

• The study identifies four new RNA viruses associated with geckos, significantly broadening the known viral landscape in these reptiles.
• Findings highlight the complex evolutionary history of gecko viruses, involving both co-divergence and host-switching events.
• This research contributes to a better understanding of viral diversity in common gecko species.