DOI:
Article Figures & Data
Tables
- Table 1.
Comparison of NCCLS breakpoints and LA test results with PCR results
Category No. of isolates Total Oxacillin MIC LA test ≤0.25 mg/liter ≥0.5 mg/liter Positive Negative mecA positive 251 0 251 251 0 mecA negative 212 129 83 1 211 - Table 2.
Oxacillin MICs and LA test results after overnight induction with an oxacillin disc
Speciesa No. of isolates Total Oxacillin MIC, ≤0.25 mg/liter Oxacillin MIC, ≥0.5 mg/liter Positive LA test result S. epidermidis mecA+ 153 0 153 153 mecA− 68 68 0 0 S. haemolyticus mecA + 25 0 25 25 mecA− 6 6 0 0 S. hominis mecA + 47 0 47 47 mecA− 33 33 0 0 S. capitis subsp.capitis mecA + 0 0 0 0 mecA − 8 8 0 0 S. capitis subsp. urealyticus mecA+ 6 0 6 6 mecA − 4 0 4 0 S. caprae mecA+ 2 0 2 2 mecA − 6 0 6 0 S. cohnii mecA+ 5 0 5 5 mecA− 15 0 15b 0 S. lugdunensis mecA + 0 0 0 0 mecA − 19 0 19 0 S. saprophyticus mecA + 2 0 2 2 mecA − 19 0 19 0 S. schleiferi mecA + 0 0 0 0 mecA − 10 10 0 0 S. simulans mecA + 5 0 5 5 mecA − 5 3 2c 1 S. warneri mecA+ 6 0 6 6 mecA − 8 1 7 0 S. xylosus mecA+ 0 0 0 0 mecA − 11 0 11 0 Total 463 mecA+ 251 0 251 251 mecA− 212 129 83 1 - Table 3.
MRSA-Screen results for 125 mecA-positive strains with and without oxacillin induction
Species No. of isolates Total LA with induction LA without induction Observed at: Not observed 3 min 6 min 15 min S. epidermidis 70 70 18 10 4 38 S. capitissubsp. urealyticus 5 5 5 0 0 0 S. cohnii subsp. cohnii 2 2 2 0 0 0 S. haemolyticus 11 11 11 0 0 0 S. hominis 33 33 1 7 10 15 S. warneri 4 4 4 0 0 0 Total 125 125 41 17 10 53
