Table. Infection-related signs and symptoms during MCPyV and TSPyV seroconversions compared with previous and subsequent intervals for asymptomatic polyomavirus infections in children, Finland, January 2011–July 2013*.

Virus sign/symptom	Interval, no. (%)		Previous interval			Subsequent interval
			No. (%)	p value		No. (%)	p value
MCPyV seroconversion, n = 45
URTI	14 (31.8)		10 (22.2)	0.4545		18 (41.9)	0.3018
LRTI	3 (6.8)		2 (4.4)	1.0000		3 (7.0)	1.0000
Fever without RTI	2 (6.8)		2 (4.4)	1.0000		3 (7.0)	0.6250
Gastroenteritis	9 (20.5)		9 (20.0)	1.0000		11 (25.6)	0.5488
Acute tonsillitis	1 (2.3)		0	ND		1 (2.3)	1.0000
Acute otitis media	10 (22.7)		11 (24.4)	1.0000		13 (30.2)	0.6291
Acute conjunctivitis	2 (4.5)		1 (2.2)	1.0000		1 (2.3)	1.0000
Exanthema	7 (15.9)		1 (2.2)	0.0703		1 (2.3)	0.0703
Acute sinusitis	2 (4.5)		0	ND		1 (2.3)	1.0000
Total	32 (72.7)		26 (57.8)	0.2632		31 (72.1)	1.0000
No data	1		0	NA		2	NA
TSPyV seroconversion, n = 39
URTI	14 (35.9)		9 (23.1)	0.3593		13 (35.1)	1.0000
LRTI	3 (7.7)		3 (7.7)	1.0000		2 (5.4)	1.0000
Fever without RTI	2 (5.1)		5 (12.8)	0.3750		4 (10.8)	0.6875
Gastroenteritis	10 (25.6)		12 (30.8)	0.7744		5 (13.5)	0.3877
Acute tonsillitis	1 (2.6)		1 (2.6)	1.0000		2 (5.4)	1.0000
Acute otitis media	8 (20.5)		12 (30.8)	0.3877		8 (21.6)	1.0000
Acute conjunctivitis	4 (10.3)		5 (12.8)	1.0000		3 (8.1)	1.0000
Exanthema	2 (5.1)		3 (7.7)	1.0000		1 (2.7)	1.0000
Acute sinusitis	3 (7.7)		2 (5.1)	1.0000		2 (5.4)	ND
Total	32 (82.1)		30 (76.9)	0.7266		30 (81.1)	1.0000
No data	0		0	NA		2	NA
*Liddell exact test was used; p<0.05 was considered significant. MCPyV, Merkel cell polyomavirus; TSPyV, trichodysplasia spinulosa-associated polyomavirus; LRTI, lower respiratory tract infection; URTI, upper respiratory tract infection; ND, no data; NA, not applicable.