TABLE 2.
Results of icaAB and mecA gene amplification grouped by the origins of the strains
| Origin of strainsa | No. of strains | % Positiveb for:
|
||
|---|---|---|---|---|
| icaAB | mecA | icaAB + mecA | ||
| S | 39 | 30 (76.9) A | 30 (76.9) C | 25 (64.1) E |
| K | 44 | 30 (68.2) B | 37 (84.0) D | 29 (65.9) F |
| C | 39 | 11 (28.2) A, B | 19 (48.7) C, D | 8 (20.5) E, F |
| H | 16 | 6 (37.5) | 4 (25.0) | 1 (6.2) |
a
Group S contains sepsis strains infecting at least three blood cultures or two blood cultures and one concomitant entry site and displaying the same antibiotic resistance profile for each patient. Group K contains strains significantly colonizing intravascular devices. Group C contains contaminating strains isolated from only one blood culture and not associated with positive culture of entry sites. Group H contains strains sampled from the hands of healthy volunteers.
b
Values with the same letter are statistically significantly different from each other as follows: A, P = 10−5; B, P = 0.003; C, P = 0.02; D, P = 10−3; E, P = 5 × 10−4; and F, P = 5 × 10−5.