人蛔虫と豚蛔虫との異同に関する研究
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概要
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A lot of studies have been done by many researchers on the difference in traits of the Ascarides isolated from men and those found in swine. However, no conclusions that merit unanimous approval of all the researchers concerned have ever been reached. There is no indisputable theory on how important a role swine play in the spread of Ascaris infection among men; conflicting opinions prevail as to the importance of processing the dung of swine. For the purpose of contributing to the clarification of this problem, the author carried out the experiments, the results of which are described as follows: A) Precipitation Reaction (1) When the serum immunized against the Ascarides isolated from men was mixed with the swine Ascaris antigen (all the Ascaries found in swine treated as a lot) and the serum immunized against the Ascarides isolated from swine was mixed with the human Ascaris antigen (the Ascarides found in men treated as a lot), 3 out of 22 cases and 9 out of 22 cases showed different antigen and antibody titers, respectively. (2) When the serum immunized against the Ascarides isolated from men was mixed with the swine Ascaris antigen (the Ascarides found in swine treated individually) and the serum immunized against the Ascarides isolated from swine was mixed with the human. Ascaris antigen (the Ascarides found in men treated individually), 8 out of 22 cases and 9 out of 22 cases showed different antigen and antibody titers, respectively. B) Epidemiological Observations The rate of infection with Ascardes in men varied with the localities from 6.0 per cent to 66.7 per cent, while there was scarcely any fluctuations due to the difference in localities in the rate of infection with Ascarides in swine (about 50 per cent). C) Experiments on Infection (1) Attempts to infect 8 human subjects and 1 monkey with the eggs of Ascarides isolatedfrom swine ended in a failure. (2) Attempts to infect swine with the eggs of Ascarides found in other swine yielded results opposed to each other, without leading the author to a definite conclusion. The results of the present investigation have convinced the author that the Ascarides which sponge on swine would be varieties of the species found in men. Form the standpoint of preventing men from infection with Ascaris eggs, it would not be as important to process the dung of swine as human feces.
- 千葉大学の論文
- 1956-05-28