羊ノ傳染性流産ニ關スル研究I
内蒙古林西滿鐵種羊場ニ發生セル羊ノ傳染性流産並ニ人ノまるた熱感染例ニ就テ
1936 年 15 巻 4 号 p. 286-295,en76
詳細
1936 年 15 巻 4 号 p. 286-295,en76
In early spring of this year, contagious abortion broke out among ewes at the Rinsi Sheep-Farm (S.M.R.Co.) in Rinsi, Inner Mongolia, Manchukuo. The occurrence of the ovine contagious abortion seems to be the first one noted in the Far East, whilethe bovine contagious abortion has been recognized for 20 years. in Japan, and recently even in Manchukuo. There was also observed a febrile attack among the greater number of staff and shepherds at the same farm. It, however, must be remembered. that the occurrence of Malta fever has been several times reported up to this time in China, especially in Northern China.
By our investigation, it was established that this epizootic abortion and the human affection both were due to Brucella melitensis. The results obtained from the present experiments are summarized as follows:
(1) Out of 632 pregnant ewes at this farm, 133 aborted during a period extending from early January to middle of March. (Table I).
(2) A bacillus was uniformly isolated from 4 aborted fetuses by cultivation and from 2 ewes that aborted by inoculation of their organs into guinea-pigs. (Tables II and III).
(3) Having examined these 6 strains bacteriologically, the authors determined that the strains are the same one which they classified as Br. melitensis. (Table IV).
(4) Sera of 20 ewes that aborted were examined by agglutination and complement-fixation tests and 18 of them showed a positive reaction against Br. melitcnsis. (Table V).
(5) From the above-mentioned results, it was concluded that the ovine contagious abortion under discussion is due to Br. melitensis.
(6) A febrile disease also has been observed to prevail among persons of this farm since last year. Considering the above-mentioned circumstances as well as results of serological tests, the outbreak was diagnosed as undulant fever caused by Br. melitensis. (Table VI).
