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Longitudinal Anellome Dynamics In the Upper Respiratory Tract Of children with Acute Respiratory Tract Infections

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Journal Virus Evol
Date 2023 Sep 7
PMID 37674817
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Abstract

Anelloviruses (AVs) are ubiquitous in humans and are the most abundant components of the commensal virome. Previous studies on the diversity, transmission, and persistence of AVs mainly focused on the blood or transplanted tissues from adults; however, the profile of the anellome in the respiratory tract in children are barely known. We investigated the anellome profile and their dynamics in the upper respiratory tract from a cohort of children with acute respiratory tract infections (ARTIs). Different to that in adult, is the most abundant genus, followed by . We found that the relative abundance of was higher in earlier time points, and in contrast, the abundance of was higher in later time points; these results might suggest that decreased with age and increased with age in childhood. No difference regarding the diversity and abundance of anellome was found between single and multiple ARTIs, consistent with the idea that AV is not associated with certain disease. Most AVs are transient, and a small proportion (8 per cent) of them were found to be possibly persistent, with persistence time ranging from 1 month to as long as 56 months. Furthermore, the individual respiratory anellome appeared to be unique and dynamic, and the replacement of existing AVs with new ones are common over different time points. These findings demonstrate that may be the early colonizer in children, and the individual respiratory anellome is unique, which are featured by both chronic infections and AV community replacement.

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