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Table 2 Transfer of bacteria from recently contaminated fingertips (wet inoculum) and old contamination (dry inoculum) to a donor surface (keyboard key) and when in the presence of different soiling conditions; n = 10

From: Effect of poly-hexamethylene biguanide hydrochloride (PHMB) treated non-sterile medical gloves upon the transmission of Streptococcus pyogenes, carbapenem-resistant E. coli, MRSA and Klebsiella pneumoniae from contact surfaces

 

Median Log10 CFUs transferred (Inter-Quartile Range)

Organism

Un-treated (control) glove

PHMB-treated glove

Wet Inoculum

No soiling

(DW)

Moderate soiling

(0.5% BSA)

Heavy soiling

(Blood)

No soiling

(DW)

Moderate soiling

(0.5% BSA)

Heavy soiling

(Blood)

MRSA

4.20 (4.15–4.21)

4.08 (4.06–4.11)

4.16 (4.06–4.20)

4.06 (3.96–4.07)

4.07 (4.05–4.08)

3.99 (3.95–4.09)

Carbapenem-resistant E.coli

4.12 (4.09–4.15)

4.17 (4.12–4.11)

4.13 (4.12–4.23)

4.08 (4.08–4.13)

4.10 (4.08–4.13)

4.19 (4.16–4.26)

K. pneumoniae

4.39 (4.36–4.40)

4.29 (4.25–4.45)

4.20 (4.19–4.34)

4.39 (4.25–4.40)

4.28 (4.27–4.31)

4.35 (4.29–4.39)

S. pyogenes

4.54 (4.47–4.59)

4.65 (4.60–4.66)

4.75 (4.73–4.780

4.59 (4.25–4.40)

4.54 (4.41–4.57)

4.52 (4.45–4.56)

Dry Inoculum

No soiling

(DW)

Moderate soiling

(0.5% BSA)

Heavy soiling

(Blood)

No soiling

(DW)

Moderate soiling

(0.5% BSA)

Heavy soiling

(Blood)

MRSA

4.09 (4.07–4.20)

4.21 (4.20–4.23)

4.21 (4.17–4.23)

<0.301

<0.301

1.68 (1.64–1.72)

Carbapenem-resistant E.coli

3.74 (3.69–3.80)

4.12 (4.10–4.16)

4.19 (4.15–4.27)

<0.301

<0.301

2.12 (2.05–2.40)

K. pneumoniae

4.36 (4.33–4.39)

4.34 (4.29–4.40)

4.43 (4.39–4.48)

<0.301

<0.301

1.38 (1.38–1.60)

S. pyogenes

4.29 (4.26–4.34)

4.59 (4.57–4.61)

4.66 (4.58–4.69)

<0.301

<0.301

2.77 (2.70–2.82)

  1. Note: Numbers below the detection limit (2 CFU) are expressed as <0.301 Log10 numbers