Table 17.

Mean and median risks of infection from handling raw beef and subsequent hand-to-mouth contact with or without handwashing intervention

	Escherichia coli			Escherichia coli 0157
Active	No handwashing	Handwashing	Use of alcohol hand rub	No handwashing	Handwashing	Use of alcohol hand rub
Mean	8.24 × 105	2.61 × 106	5.46 × 108	1.39 × 102	1.25 × 102	1.15 × 102
Median	9.57 × 108	1.86 × 109	5.36 × 1012	5.98 × 109	1.18 × 1010	3.71 × 1013
Standard deviation	9.00 × 104	3.18 × 105	1.33 × 106	7.79 × 102	7.52 × 102	7.26 × 102