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Table 2 MRSA Prevalence and Transmission Risk for 26 Nursing Homes

From: Nursing home characteristics associated with methicillin-resistant Staphylococcus aureus (MRSA) Burden and Transmission

 

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)

  1. a Admission prevalence swabs were not collected for nursing homes 20 through 26 due to small facility size and minimal resident turnover.
  2. 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%.