Epidemiological survey on death and disuse damages in Japanese Black fetuses and nwe born calves in miyazaki prefecture

摘要

To achieve the accident decrease of Japanese Black fetuses and nwe born calves in this prefecture, the survey and analysis of damage outbreak situations in the past 10 yeas were carried out. No difference was observed in monthly damage outbreak situations, but a significant difference was observed among those of classified associations. The number of damage outbreak per contract of 1,000 cows became 43.4 as the highest at A association, and 31.4 as the lowest at J association. Among the name of diseases, fetus death, enteritis, infirm calf, etc. occupied higher ranks, and these showed similar tendencies every year. In addition, a significant difference according to the association waas seen about the fetus death among associations, and the number of fetus death per contract of 1,000 cows became 17.9 as the highest in A association, and 12.0 as the lowest in D association. From these results, it was considered that 10 associations in this prefecture could be divided into four groups according to the outbreak situation of the damage, and that to carry out damage prevention suitable in each group was considered to result in the damage decrease in the future.