The Myotis chiloensis Guano Virome: Viral Nucleic Acid Enrichments for High-Resolution Virome Elucidation and Full Alphacoronavirus Genome Assembly
2022
Aguilar Pierlé, Sebastian | Zamora, Gabriel | Ossa, Gonzalo | Gaggero, Aldo | Barriga, Gonzalo P.
Bats are widespread mammals of the order Chiroptera. They are key for ecosystem functioning, participating in crucial processes. Their unique ability amongst mammals to fly long distances, their frequently large population sizes, and their longevity favor infectious agent persistence and spread. This includes a large variety of viruses, encompassing many important zoonotic ones that cause severe diseases in humans and domestic animals. Despite this, the understanding of the viral ecological diversity residing in bat populations remains unclear, which complicates the determination of the origins of zoonotic viruses. To gain knowledge on the viral community of a widely distributed insectivorous bat species, we characterized the guano virome of a native Chilean bat species (Myotis chiloensis (Waterhouse, 1840)). By applying a novel enrichment strategy, we were able to secure a consequent percentage of viral reads, providing unprecedented resolution for a bat virome. This in turn enabled us to identify and assemble a new bat alphacoronavirus from Chilean bats closely related to PEDV, an important viral pathogen with high mortality rates in suckling piglets. This study highlights the importance of applying and improving high-resolution virome studies in this vital order to ultimately enhance epidemiological surveillance for potentially zoonotic pathogens.
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