Investigation of Leptospira icterohaemorrhagiae and Leptospira canicola in dogs was carried out from May, 1970 to March, 1971 in Korea. A total of 943 random samples from 18 animal hospitals in 9 cities were collected and sent to Taipei and tested by the rapid microscopic agglutination test giving the following results.
1. The 943 samples gave 141 positives (14.95%).
2. Among the 18 animal hospitals a total 14 positives were found, with 30.0% being the highest and 9.1% the lowest reaction, comparing each hospital.
3. Monthly positive comparison gave the highest reaction for December (31.3%) the lowest August (5.8%). Seasonal comparison June, July and August was the lowest of all four seasons.
4. Of all the 913 cases examined, males were 505 (55.3%) and females 408 (44.7%), which gives only a difference of about 10% on the basis of sex.
Comparing positive reaction cases on the basis of sex gave a large difference, of almost twice.
Male ……… 92: Female ……… 47
5. Comparing 436 (46.9%) sick dogs against 492 (53.1%) healthy dogs gave 13.3 and 16.1% positive respectively. Thus indicating that some of the healthy dogs have inapparent infection.
6. Comparing on the basis of positive serum type L. icterohaemorrhagiae gave 133 (54.7%) and L. canicola 110 (45.3%) Generally both L. icterohaemorrhagiae and L. canicola produce common reaction with positive serum.
7. Comparing by age a total of 89 positive cases gave the following results.
less than 1 year ……… 49 (55.5%)
from 1 year to 2 years ……… 26 (29.2%)
from 2 year to 3 years ……… (13.5%)
over 3 years ……… 5
8. Among 80 field rats collected at Suwon and tested by rapid microscopic agglutination test for L. icterohaemorrhagiae and L. canicola gave all negative reactions.
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