Highly diverse RNA viruses and phage sequences concealed within birds

Area of Science:

• Virology
• Ecology
• Genomics

Background:

• Birds host diverse viruses with potential zoonotic implications.
• Advanced sequencing technologies enable large-scale viral discovery.
• Understanding avian viral diversity is crucial for public health and ecosystem monitoring.

Purpose of the Study:

• To conduct a large-scale viral metagenomics survey of birds in China.
• To identify novel RNA viruses associated with avian species.
• To investigate the phylogenetic novelty and classification of detected viruses.

Main Methods:

• Viral metagenomics analysis of cloacal swabs from 2,990 birds.
• Screening of over 1,800 RNA sequences with low amino acid identity to known viruses.
• Phylogenetic analysis to determine viral novelty and evolutionary relationships.

Main Results:

• Identification of over 1,800 novel RNA viral sequences, including potential new vertebrate-associated viruses.
• Detection of numerous plant, fungi, and insect-related RNA viruses, some previously unknown.
• Phylogenetic analysis suggests potential for new viral families, genera, or species.

Conclusions:

• The study reveals significant and largely unexplored RNA virus diversity in birds.
• Findings contribute to understanding viral evolution and filling phylogenetic gaps.
• Data aids in predicting disease risks and monitoring viral threats to wildlife and human health.