In order to cure and prevent paraplegia ante and post partum in dairy cow, which results in frequent disease injuries, high disuse rate and severe economical damages, application of a hock binding belt was attempted in addition to the currently used symptomatic treatment and the following excellent results were obtained. When 103 head of paraplegia cow found during the period of 1987 to 1989 were subjected to the currently used symptomatic treatment without applying the binding belt(cow group without binding belt), 71 head were cured(68.9 % ) and 32 head were disused ( 31.7 % ). On the contrary, when the binding belt was applied to 18 head of paraplegia cow found in 1990(cow group with binding belt), 17 head were cured(94.4 %) and only one head was disused(5.6 %), thus showing a significantly high healing ratio in the cow group with binding belt compared to the group without binding belt. When the binding belt was applied to 8 head of paraplegia cow which were likely to be seized with paraplegia ante and post partum caused by a difficult delivery and the like, all individuals were prevented from the disease. It seemed that paraplegia and unstable standing up which occur in dairy cow ante and post partum could be healed and prevented by the application of the hock binding belt.

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As a means for the early detection and diagnosis of potential abnormality of cardiac functions and for the genetic analysis of genetic factor distribution conditions, attempts were made to apply mechanocardiography to non-attacked cows originated from an RCC breeding stock line having genetic character of hereditary dilated cardiomyopathy. Among 20 RCC cows tested, four died of dilated cardiomyopathy. Another one died of acute heart failure, but with a high probability of being dilated cardiomypathy. When 8 survived cows were checked by means of the mechanocardiography, relatively significant analytical data of abnormality were obtained from five cows which, however, were judged as genetically non-attacked healthy ones.
From the remaining three cows, almost normal analytical data were obtained with only slight changes. Three cows, therefore, were judged as non-attacked normal ones. When expressed and expected values of the gene distribution in the group were analyzed by means of population genetics, it was found that the analytical results coincided theoretically with the gene frequency in the group without any contradiction. Since distribution conditions of genetic factors in terms of generation coincided with Mendel's law, it was able to understand these conditions in each heifer. A possibility was indicated that mechanocardiography could be applied to mass examination for early diagnosis and prevention of latent heart failure and for understanding of the distribution condition of genetic factors. On the basis of these results, it was thought that prevention of the onset of dilated cardiomyopathy through the elimination of the corresponding genetic factor could be achieved by avoiding crossing between lines having the factor and by performing crossing with a breeding stock having AA factor and hardly showing abnormality by mechanocardiography.

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Studies were performed on the environmental changes inside a container during transportation of calves by an automobile (a truck), as well as general examination of calves and onset of sickness during and after their transportation. Among 481 head of Japanese Black calves of about ten months old introduced during the period of two years from April 1987, to March 1989, the onset frequency of respiratory diseases was higher in those purchased from markets in other prefectures than this prefecture, and most of the onset of such diseases started within 10 days after the irintroduction. Five calves were transported by a truck by placing them on the truck bed at a certain arrengement and circulation of ventilating air, wind velocity and the like in the container were checked. The ventilating air inside the container passed through almost constant passage and at a certain direction. It was confirmed that the air inside the container was rich in circulating dust and particles of bedding materials and that the air once exhausted from the front . ventilation opening again drifted into the container from its back side. In consequence, some calves placed rearward in the container showed abnormalities. The intake of air into the container was found to be sufficient.
It was concluded that high contents of dust and particles of bedding materials in the air inside the container of a truck, vibration from the truckand like act as stress-causing factors during transportation of calves and hence become the cause of diseases in the respiratory organ, the digestive organs and the like.

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