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Table 2 Molecular characterization of MRSA isolates from infection sites and carrier colonization sites

From: Comparative and molecular analysis of MRSA isolates from infection sites and carrier colonization sites

 

Genotype

Carrier (55)

Infection (51)

p value

OR (95% CI)

SCCmec

III

3

7

0.17

0.37 (0.07–1.48)

IVa

25

9

0.002

3.84 (1.59–9.81)

IVc

21

27

0.13

0.55 (0.25–1.20)

V

6

8

0.49

0.66 (0.20–2.1)

MLSTa

CC1 (ST1, ST772)

5

8

0.30

0.53 (0.15–1.76)

CC5 (ST5, ST149)

4

5

0.64

0.71 (0.16–2.96)

CC6 (ST6)

6

0

0.02

Undefined

CC8 (ST8,ST239, ST241)

3

8

0.091

0.31 (0.06–1.19)

CC22 (ST22)

10

1

0.01

10.7 (1.70–242)

CC30 (ST30)

0

2

0.23

Undefined

CC45 (ST46)

2

0

0.27

Undefined

CC80 (ST80,ST1440)b

21

23

0.43

0.73 (0.33–1.59)

CC88 (ST88)

3

2

0.76

1.38 (0.20–12)

CC97 (ST97)

1

1

0.95

0.91 (0.02–36.08)

PVL

Pos

26

36

0.02

0.38 (0.17–0.84)

Neg

29

15

sea

Pos

16

22

0.14

0.54 (0.24–1.22)

Neg

39

29

seb

Pos

7

1

0.04

7.18 (1.06–168.6)

Neg

48

50

sec

Pos

0

0

NA

NA

Neg

55

51

sed

Pos

3

0

NA

NA

Neg

52

51

see

Pos

11

6

0.26

1.86 (0.63–5.88)

Neg

44

45

eta

Pos

0

0

NA

NA

Neg

55

51

etb

Pos

0

0

NA

NA

Neg

55

53

tst

Pos

8

7

0.91

1.07 (0.35–3.34)

Neg

47

44

Average vancomycin MIC

0.81

1.26

0.021$

(0.35–0.55)

  1. sea, seb, sec, sed, and see staphylococcal enterotoxin A, B, C, D, and E
  2. eta and etb exfoliative toxin A and B
  3. tst toxic shock toxin
  4. aOne of the isolates in infection group was a singleton in eBurst and could not be allocated to any CC
  5. bIncludes also the 4 new STs from 6 samples according to eBurst
  6. $p value (two-tailed) from Hartley’s f test for equality of variance