Small Circular Rep-Encoding Single-Stranded DNA Genomes in Peruvian Diarrhea Virome.

Area of Science:

• Virology
• Genomics
• Microbiology

Background:

• Human enteric viruses are common causes of diarrhea.
• Small circular DNA viruses, including Rep-encoding single-stranded DNA (CRESS-DNA) viruses, are increasingly identified in various environments.
• The diversity and origins of CRESS-DNA viruses in human samples are not fully understood.

Purpose of the Study:

• To characterize the viral communities in human diarrhea samples using metagenomic analysis.
• To identify and classify novel CRESS-DNA viral genomes present in these samples.
• To investigate the potential origins and relationships of identified CRESS-DNA viruses.

Main Methods:

• Metagenomic sequencing of DNA extracted from human diarrhea samples.
• Bioinformatic analysis for viral genome assembly and identification.
• Phylogenetic analysis to determine the evolutionary relationships of novel viral sequences.

Main Results:

• Metagenomic analysis identified numerous human enteric viruses.
• Nine novel CRESS-DNA viral genomes were discovered.
• One genome showed relatedness to smacoviruses, and eight were similar to previously reported mammalian fecal viruses.
• The host tropism of these novel CRESS-DNA viruses remains undetermined.

Conclusions:

• Human diarrhea is associated with a diverse range of CRESS-DNA viruses.
• The findings suggest potential interspecies transmission or shared origins between human and mammalian CRESS-DNA viruses.
• Further research is needed to elucidate the biological roles and host tropism of these newly identified CRESS-DNA viruses.