Table 1.

Human polyomaviruses.

Nomenclature	Year identified	Prevalence in human population	Disease associations
BKV	1971	>90% of adults	Cystitis, polyomavirus-associated nephropathies, ureteral stenosis
JCV	1971	>70% of adults	Progressive multifocal leukoencephalopathy
KIV	2007	55–70% of adults	Not defined
WUV	2007	69–80% of adults	Not defined
MCPyV	2008	42–70% of adults	Merkel cell carcinoma
HPyV6	2010	Not defined	Not defined
HPyV7	2010	Not defined	Not defined
TSPyV	2010	Not defined	Transplant-associated trichodysplasia spinulosum
HPyV9	2011	Not defined	Not defined

BKV: BK virus; JCV: JC virus; KIV: Karolinska Institute polyomavirus; WUV: Washington University polyomavirus; MCPyV: Merkel cell polyomavirus; HPyV6: human polyomavirus 6; HPyV7: human polyomavirus 7; TSPyV: trichodysplasia spinulosum polyomavirus; HPyV9: human polyomavirus 9.