Most epidemiological data on the prevalence of this disease in ruminants originated from slaughterhouse records.
Animal pits should be enclosed or adequately fenced and slaughterhouses should be renovated.
The amount of positive flocks increased from 7 during rearing to 13 for the chicken carcasses leaving the slaughterhouse.
This type was not found in any other slaughterhouse.
However, the two slaughterhouses were visited twice as many times.
Although, most slaughterhouses have a temperature-regulation system installed, the cooling capacity is often exceeded during hot weather.
Caecal samples were taken in the slaughterhouses from five birds per flock.
The swabs were then massaged by hand or in a stomacher bag for 2 min if the latter equipment was available at the slaughterhouse.
