STUDY ON THE MASS TREATMENT OF ANCHYLOSTOMIASIS AND ON THE SPONTANEOUS CONVERSION TO NEGATIVE
10.2185/jjrm.8.49
- VernacularTitle:鉤虫集団駆虫および自然陰転に関する研究
- Author:
Y. OZEKI
- Publication Type:Journal Article
- From:Journal of the Japanese Association of Rural Medicine
1959;8(1):49-56
- CountryJapan
- Language:Japanese
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Abstract:
We examined the stool of the 989 prisoners who were serving their time at the Chiba Prison. to see the percentage of anchylostomiasis. on the assumption that the channel of infection should have been cut off for them. The percentage of all the ova positive cases was 12.2. The percentages were in reverse proportion to the length of imprisonment. The relationship between the years of imprisonment (X) and the percentage of ova positive cases (Y) was: Y=19. 12-1. 92X. These positive cases were left untreated for two years.Stool examinations were executed one whole year and two whole years after the initial examination. both by flotation technic and by culture.each repeated twice at short intervals. At each examination.3 specimens were taken for flotation and 2 specimens for culture per capita. The examination conducted in the second year or one year after the initial examination revealed 16.5% spontaneous conversion to negative. and that of the third year 16.7% conversion among the remaining positive cases. The ratio of spontaneous conversion to negative was higher among the prisoners of shorter imprisonment; by species. it was higher for those who were infected only with Anchylostoma duodenale; and by degree of infection. it was higher for those of mild infection.
