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Table 2 Attack rates (AR) by tap water drinking exposures among 101 randomly selected household members from Røros

From: A large waterborne outbreak of campylobacteriosis in Norway: The need to focus on distribution system safety

Tap water drinking from

Cases

Total exposed

AR %

RR (95% CI)

no tap water

0

5

0

/

RH only

10

27

37

Ref.

RL only

20

40

50

1.3 (0.7–2.4)

both zones

17

29

59

1.6 (0.9–2.8)

  1. RH: higher zone, RL: lower zone of Røros waterworks