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Table 4 Reduction in viability of S. aureus still present on outer shell fabrics after washing with sanitizer

From: Survival of Staphylococcus aureus on the outer shell of fire fighter turnout gear after sanitation in a commercial washer/extractor

Duration of vortexing in water or sanitizer Swatch type Exp. no. Inoculum (CFU/ Swatch) Recovery of viable cells from water washed swatch (CFU /aSD) Recovery of viable cells from sanitizer washed swatch (CFU /aSD) Percent reduction
10 Seconds (Carrier Count Control) Gemini™ 1 1.7 × 107 2.5 × 105 /1.5 × 105 1.4 × 105 /1.8 × 105 46
Gemini™ 2 1.9 × 107 8.1 × 105 /3.8 × 105 1.8 × 105 /1.6 × 105 77
Gemini™ 3 3.7 × 107 5.1 × 104 /1.2 × 104 6.6 × 103 /1.4 × 103 87
Gemini™ 4 3.4 × 107 1.9 × 105 /1.2 × 105 3.5 × 104 /1.7 × 104 82
Advance™ 1 2.5 × 107 4.3 × 104 /1.2 × 104 1.7 × 102 /1.1 × 102 99.6
Advance™ 2 2.5 × 107 4.3 × 104 /6.5 × 103 4.7 × 102 /9.7 × 101 98.9
Pioneer™ 1 2.4 × 107 4.0 × 105 /4.8 × 104 1.1 × 101 /1.3 × 101 100
Cotton 1 2.4 × 107 1.5 × 106 /5.8 × 104 2.3 × 102 /3.2 × 102 99.9
10 Minutes (Carrier Count Control) Gemini™ 1 3.3 × 107 3.2 × 105 /2.6 × 105 1.2 × 105 /7.3 × 104 63
Gemini™ 2 1.4 × 107 9.0 × 105 /3.1 × 104 9.1 × 103 /4.3 × 103 99
Gemini™ 3 3.5 × 107 1.6 × 106 /7.9 × 105 7.9 × 105 /8.4 × 105 51
Gemini™ 4 3.0 × 107 4.8 × 106 /9.2 × 105 1.9 × 106 /1.6 × 106 61
Advance™ 1 2.1 × 107 4.3 × 104 /1.4 × 105 1.9 × 102 /7.7 × 102 99.5
Advance™ 2 2.5 × 107 4.3 × 104 /1.7 × 104 2.1 × 103 /5.8 × 102 95
Pioneer™ 1 3.9 × 107 8.2 × 104 /3.2 × 104 0 100
Cotton 1 2.2 × 107 1.2 × 106 /4.8 × 105 0 100
Washer/Extractor Swatch type Exp. no. Inoculum (CFU/ Swatch) Recovery of viable cells from unwashed swatch (CFU /aSD) Recovery of viable cells from sanitizer washed swatch (CFU /aSD) Percent reduction
Test 1 Gemini™ 1 2.9 × 107 1.6 × 106 /5.7 × 105 4.2 × 103 /1.4 × 103 99.7
Test 2 Pioneer™ 1 2.9 × 107 1.3 × 106 /5.8 × 105 0 100
  1. Carrier count swatches were vortex-washed for 10 s or 10 min, and then incubated in DEB for 5 h to elute remaining cells
  2. All carrier count experiments are average of 3 replicate swatches per experiment
  3. Washer/extractor test of S. aureus inoculated Gemini swatches are average of 4 swatches pinned to two turnout gear jackets
  4. Washer/extractor test of S. aureus inoculated Pioneer swatches are average of 3 swatches pinned to two turnout gear jackets
  5. aSD standard deviation