# Uncommon BK polyomaviruses detected in allogeneic hematopoietic cell transplant recipients

## TL;DR

This study reports rare BK polyomavirus infections in transplant patients, highlighting the need to understand viral diversity in disease.

## Contribution

The paper presents near full-length genome sequences of uncommon BKPyV genotype II in transplant recipients in the USA.

## Key findings

- BKPyV genotype II was detected in two allogeneic hematopoietic cell transplant recipients.
- This genotype is uncommon in the USA and its role in disease is not well understood.

## Abstract

The role of viral diversity in the pathogenesis of BK polyomavirus (BKPyV)-associated disease is poorly understood. Here, we report near full-length BKPyV genome sequences from two allogeneic hematopoietic cell transplant recipients infected with BKPyV genotype II, which is uncommon in the USA.