Table 1.

Results from MPV room sentinels and targeted sentinel testing

MPV-positive room	no. of racks in room	no. of routine sentinels in room	no. of MPV seropositive routine sentinels in room	no. of rounds of targeted testinga
A	6	23	1	8
B	6	21	3	4
C	5	12	2	5
D	2	8	2	5
E	3	12	2	5
F	5	20	4	10
G	8	32	2	8
H	4	24	2	5
I	6	24	4	8
J	7	40	2	5
K	6	24	2	3b
L	3	12	2	3b
Mean	5.08	21.0	2.33	5.75
Total	61	252	28	69

^aTo be declared free of MPV, a room had to undergo 3 rounds of serology testing with all targeted sentinels being seronegative

^bTargeted sentinels did not detect infection in these rooms