[Increased frequency of CRD in the broiler production in northern Jutland. II. Influence on production and economy (author's transl)].

The consequences for production and economy caused by an increase in CRD outbreaks in broilers in northern Jutland are estimated by comparing production results from book-keeping farms to the average results of the whole country, where an improvement of 19 gram was found, while a similar increase did not occur in northern Jutland (Table I). The condemnation rate has risen 0.4% in northern Jutland. For the whole country 0.1% rise has been registered. Production results from 6 book-keeping farms with CRD have been compared to the results from all book-keeping farms in the region. It appears from Table III that the 6 farms were lacking 60 gram weight increase and 0.03 in feed conversion. Gross margins for production without problems have been calculated to 0.70 kr. per chicken against 0.42 kr. per chicken in the 71 CRD attacked flocks (Tables IV and V). If in addition also slaughterhouse expenses are added the total loss due to CRD in the 71 flocks sum up to 510.144 kr.