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Table 4 Distribution of selected variables among broiler houses in Iceland

From: House-level risk factors associated with the colonization of broiler flocks with Campylobacterspp. in Iceland, 2001 – 2004

Variable Description of variable or level Number of houses
Ventilation type (n = 75) Both 25
  Horizontal 6
  Vertical 42
  Variable changed during the study period (from horizontal to vertical) 2
Boots cleaned and disinfected before entry to house (n = 80) Always 54
  Sometime (according to need) 0
  Never 21
  Variable changed during the study period (from never to always) 2
  Variable changed during the study period (from sometime to never) 3
Use of geothermal water for cleaning (n = 80) Yes 59
  No 21