Table 2.
MRSA Prevalence and Transmission Risk for 26 Nursing Homes
| No. Beds | MRSA Admission Prevalencea | MRSA Point Prevalence | Estimated MRSA Transmission Riskb | |
|---|---|---|---|---|
| NH1 |
124 |
3% (3) |
8% (8) |
5% |
| NH2 |
59 |
4% (2) |
22% (22) |
19% |
| NH3 |
145 |
8% (8) |
30% (30) |
24% |
| NH4 |
208 |
9% (9) |
19% (19) |
11% |
| NH5 |
137 |
10% (5) |
25% (17) |
16% |
| NH6 |
24 |
11% (11) |
7% (7) |
0% |
| NH7 |
198 |
12% (12) |
22% (22) |
11% |
| NH8 |
80 |
13% (13) |
25% (25) |
14% |
| NH9 |
99 |
14% (7) |
27% (27) |
15% |
| NH10 |
99 |
16% (16) |
31% (31) |
18% |
| NH11 |
99 |
16% (16) |
37% (37) |
25% |
| NH12 |
98 |
16% (16) |
39% (29) |
27% |
| NH13 |
255 |
20% (20) |
42% (42) |
28% |
| NH14 |
99 |
21% (21) |
16% (16) |
0% |
| NH15 |
145 |
22% (11) |
34% (34) |
15% |
| NH16 |
138 |
22% (22) |
30% (30) |
10% |
| NH17 |
182 |
25% (25) |
39% (39) |
19% |
| NH18 |
99 |
29% (29) |
44% (44) |
21% |
| NH19 |
143 |
31% (31) |
52% (52) |
30% |
| NH20 |
46 |
----- |
0% (0) |
n/a |
| NH21 |
124 |
----- |
2% (1) |
n/a |
| NH22 |
45 |
----- |
10% (4) |
n/a |
| NH23 |
41 |
----- |
16% (4) |
n/a |
| NH24 |
99 |
----- |
26% (13) |
n/a |
| NH25 |
30 |
----- |
27% (8) |
n/a |
| NH26 |
46 |
----- |
28% (10) |
n/a |
| Mean (SD) |
110 (58) |
16% (8) |
25% (13) |
16% (8) |
| Median (range) | 99 (24–255) | 16% (3–31) | 26% (0–52) | 15% (0–30) |
a Admission prevalence swabs were not collected for nursing homes 20 through 26 due to small facility size and minimal resident turnover.
b Estimated transmission risk was calculated as the absolute difference (MRSA point – admission prevalence) divided by the number of at risk patients per 100 admitted. For example, for NH3, transmission risk = (30% - 8%) / (100–8) = 24%.