A new highly divergent copiparvovirus in sheep

Area of Science:

• Veterinary Virology
• Molecular Biology
• Genomics

Background:

• Parvoviridae, a family of small, non-enveloped viruses, includes the subfamily Parvovirinae, known to infect vertebrates.
• Infections can range from severe disease to asymptomatic states, impacting animal health and agricultural productivity.

Purpose of the Study:

• To investigate the viral cause of an abortion outbreak in a sheep flock using high-throughput sequencing.
• To characterize a novel parvovirus identified from affected sheep samples.

Main Methods:

• High-throughput sequencing (HTS) was employed to analyze samples from a sheep abortion outbreak.
• Bioinformatic analysis was used to assemble and analyze the viral genome, focusing on the nonstructural protein (NS1) gene.

Main Results:

• A nearly complete parvovirus genome (approximately 4.9 kb) was successfully sequenced.
• The NS1 protein showed less than 30% amino acid identity to known copiparvoviruses and less than 22% to other Parvovirinae members, indicating significant divergence.
• Phylogenetic analysis placed the new virus within the Copiparvovirus genus, distinct from existing species.

Conclusions:

• The identified virus, provisionally named 'sheep copiparvovirus 1', represents a novel parvovirus.
• Based on genomic and phylogenetic data, it should be classified as a new species within the genus Copiparvovirus.
• This discovery expands our understanding of parvovirus diversity and potential pathogens in livestock.