馬パラチフスの血清疫学的研究

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タイトル別名
  • Studies on the Serological Epidemiology of the Horse Salmonellosis
  • バ パラチフス ノ ケッセイエキガクテキ ケンキュウ

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The distribution types of the agglutination title of the horse salmonellosis, caused by Salmonella abortus equi were studied by age and by inhabiting district.<br>The agglutination titles were measured for the individuals inhabiting in the salmonellosis contaminated and not contaminated districts and for these which were slaughtered.<br>The frequency tables of the title ×20, ×40, ×80 and so on were obtained for each class of age and each district. The titles were transformed into the exponentials, for example, ×20 into 20×2 and ×80 into 20×22, and the distribution curves, title frequency versus transformed title, were determined statistically.<br>The results obtained were as follows.<br>1) In the salmonellosis contaminated districts:The distribution type of the agglutination titles for the horse group of one year of age was determined as the Log-Pólya-Eggenberger type, for the group of two years of age as the Log-Poisson type and for that of each group of three, four and five years of age as the Log-Normal type.<br>2) In the non-contaminat districts:<br>For the group of each class of age, the distribution type was determined as the Log-Poisson type.<br>3) In the cases of the slaughtered:<br>The Log-Normal type was determined.<br>The frequency distribution curve of the agglutination titles depends upon the difference of ages and the presence of the contamination in the inhabiting district. The mean value of the title increases as the age of horse advances, so the determination of the presence of an inapparent epidemics of the salmonellosis by measuring the agglutination title must be considered the age of the individuals.

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