JAPAN JOURNAL OF VETERINARY INFORMATICS
Online ISSN : 1884-5614
Print ISSN : 0912-8913
ISSN-L : 0912-8913
Volume 1991, Issue 27
Displaying 1-8 of 8 articles from this issue
  • —Time-Place Clusters of Outbreaks and Relative Vaccination Rates.
    Takashi OGAWA, Hideo HATAKEYAMA
    1991Volume 1991Issue 27 Pages 1-9
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Time-place clusters on outbreaks of Ibaraki disease and bovine ephemeral fever were discussed with retrospective study, one of the epidemiologic methods, based on the database which was obtained from incidence and vaccination rates of the both disease, since 1953, including an antibody survey. As a result, the survey of subclinical disease and preservation of the level of vaccination to Ibaraki disease are key factors to prevent and/or to forecast an occurrence of the disease. On the other hand, a turning point in the outbreak of bovine ephemeral fever is a level in the immunity of the population at risk, by exposure to the disease. It is very important in the maintenance of the vaccination control at the exposure zone in bovine ephemeral fever.
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  • Nobuyuki YOSHIURA, Eiichiroh MIZUTANI
    1991Volume 1991Issue 27 Pages 11-15
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Life expectancy of the dairy cattle in our district was studied for the purpose of knowing the economical life span of the dairy cattles in various feeding circumstances.
    Referring to the register of livestock insurance issued in September 1988 and that in September 1989, a life table was prepared based on the number of individuals replaced in one year. The life expectancy calculated from this table was 3.9 years with those one year of age, 3.4 years with those two years of age, 2.1 years with those five years of age, and 1.4 years with those ten years of age. It seemed advisable to use the life expectancy not of those one year old, that is the age in the raising term, but of those two years old, that is the age of primipara, when the life expectancy is used as an index for feeding circumstances of the dairy cattles.
    The animals were divided into groups by districts, sizes of livestock keeping in numbers, renewal percentages, and systems of grazing, and the respective life table was prepared. As the result, in comparison of the life expectancies obtained from the two year old animals, it was noted shorter as the number of feeding animals was larger. It was also shorter as the renewal percentage was higher, showing no difference between the open yard feeding and the drylot feeding.
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  • Yasuko KONDO, Naoko YOSHIURA, Tomoko MIZOMOTO, Hidemichi KOMOTO
    1991Volume 1991Issue 27 Pages 17-20
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Serum sialic acid is useful for diagnosis of inflammatory diseases and to observe their course of development. However, it is said to show differences in mean values according to ways of the feeding management. Therefore, serum sialic acid was measured using 88 adult dairy cattles in 4 farms and studied. As the result, the mean threshold of health was 45.2±14.0mg/dl being close to the level stated in the reports available, a little lower though. Referring to ages, it was 44.7±12.5mg/dl with those in 1-2 years, 44.7±13.9mg/dl with those in 2-3 years, 45.1±15.5mg/dl with those in 3-4 years, 47.9±15.3mg/dl with those in 4-5 years, and 44.2±12.9mg/dl with those over 5 years. Since serum sialic acid of adult dairy cattles is known to reveal certain differences in the threshold of health by districts, it was considered necessary to obtain the own threshold of health in the respective field making good use of the same in the dairy examinations.
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  • Masashi KANEKO, Hiroshi NAKAYAMA, Noriyuki IGARASHI, Yoshibumi KUWABAR ...
    1991Volume 1991Issue 27 Pages 21-25
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    With the view of setting up proper food intake of a mini-pig, the influence of the food intake on its physique was examined. A total of 13 heads of CLAWN mini-pig (8 females, 5 males) produced by the Imamichi Institute for Animal Reproduction were measured for body weight and body measure value up to 3-10-month-old. Test pigs were divided into 4 groups according to the sex and food intake (700 and 1000g/day) . Using these results and starting from the correlation matrix, principal component analysis was made and sample scores for each group were compared. As a result, obesity and thinness were noted in the 1000g/day-female group and the 700 g/day-male group, respectively. These results indicated that mini-pig's food intake had different influences on its physique according to the sex. Therefore, its food-intake needs to be set up in a separate manner by due sex.
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  • Masahiro TAKAHASHI, Kenji MURAKAMI, Seiichi KANEKO
    1991Volume 1991Issue 27 Pages 27-33
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Peculiarities related to the outbreak of food poisoning were studied referring to the number of occurrences and patients stated in the “List for Outbreaks of Food Poisoning”, edited by the Food Sanitation Division, Kanagawa Prefectural Office, as well as the values calculated from the prediction model obtained by a discriminant analysis. It was studied from 1979 to 1988, 10 years in total, 5 months from June to October each year.
    1) Peculiar days for the outbreak of food poisoning were September 4th, 8th, 7th and 13th and August 26th in that order according to the mean of occurrences and the coefficient of variation.
    2) Referring to the number of patients, peculiar days were September 4th and 13th, August 5th and 25th, and July 29th.
    3) From the above results, the peculiar days referring to the number of occurrences and patients were accumulated in the first half of September.
    4) Frequency of occurrences by weekdays as to the number of occurrences and patients were known from the statistical tests to be significantly higher on Sundays, Fridays and Tuesdays, and lower on Wednesdays.
    5) In the predicted level, no significant difference was noted between any of the weekdays.
    6) Terms predicted for the outbreak of food poisoning were: from July 14th to 17th, and from July 23rd to September 17th, according to means of the prediction levels by days, wherein the highest was noted in the period from August 20th to 23rd, 4 days in all.
    As stated above, such a discrepancy caused between the predicted levels based on the environmental factors and the actual incidences reveals that some artifactual influence such as social factors like eating habits, etc., and those who cooked the meals are strongly connected to the occurrence of food poisoning. Thus, it seems to be feasible to improve accuracy of the prediction model for the outbreak of food poisoning, if the mean value by days and weekdays in the number of occurrences and patients or even the mean prediction level by days is employed as a dummy variable, in addition to the environmental factors. Furthermore, it is also considered necessary to establish a prediction model for the outbreak of food poisoning every month, if it is required after application of the administrative policy.
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  • Mutsuyo KADOHIRA
    1991Volume 1991Issue 27 Pages 35-36
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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  • [in Japanese]
    1991Volume 1991Issue 27 Pages 37-41
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
    Download PDF (476K)
  • [in Japanese]
    1991Volume 1991Issue 27 Pages 42
    Published: December 25, 1991
    Released on J-STAGE: May 31, 2010
    JOURNAL FREE ACCESS
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