レプトスピラ病の分布に關する研究

第2報 レプトスピラ病感染源としての犬の意義

抄録

The author carried out serological tests for canine leptospiroses by Schüffner-Mochtar's agglutination-lysis tests and examined by darkfield microscopy the kidneys of dogs caught in Fukuoka City, a sporadic area of human canicola fever, and in Raizan Village (Itoshima District) and Hojo Village and neighborhood (Tagawa District), epidemic areas of the disease.
Examination of the sera and the kidneys disclosed that of 458 dogs from Fukuoka City 108, 23.6%, were positive for leptospiral infection, serologically, comprising 16 positive for L. icterohaemorragiae, 81 for L. canicola, and 11 for L. icterohaemorragiae and L. canicola, titer being equal for both, and 30, 6.6%, positive for leptospira, microscopically, the strains isolated from 6 of those 30 being identified as L. canicola; that of 11 dogs from Raizan Village, an area where there had been an epidemic outbreak of 43 cases of canicola fever one year before, 6, 54.5%, were positive for leptospiral infection due to L. canicola, serologically, and 3, 21.3% for leptospira, microscopically; that of 56 dogs from Hojo Village and neighborhood where 114 cases of epidemic canicola fever had broken out one month before, 35, 62.5%, were infected with leptospira, including 1 with L. icterohaemorrhagiae and 34 with L. canicola, serologically, and 12, 21.4%, positive for leptospira, microscopically, the strains isolated from 5 of the 12 dogs being identified as L. canicola.
As the figures show, the incidence in percentage was higher among the dogs from the two villages and neighborhood than among those from Fukuoka City. The incidence was approximately the same among males and females. The infected dogs were of any age, but were more numerous among those one to two years old.