鉤虫卵の発育に関する研究 : 特にポリエチレン・フィルム法による観察
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概要
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Observations of the growths of hookworm eggs by polyethylene film, method can achieve the best result in a study of the same hookworm eggs to be carried out consecutively in the same place. By using this method, a study was made on the growths of Necator americanus and Ancylostoma duodenale eggs. The result is as follows : 1. The growths of N. americanus and A. duodenale eggs, when kept in saturated saline solution and incubated at 28℃, remained almost unaffected by environmental conditions, so long as incubation did not exceed in duration 3 hours in the former and from 5 to 6 hours in the latter. 2. Examinations of N. americanus detected in the stool of aperson only infested with it, who has a habit of evacuating the bowels regularly every day, revealed that all eggs found in different portions of thes tool showed the same tendency of growth. 3. Comparison of the growths of N. americanus by Kawara (tile) method with their growths by polyethylene film method showed that there was no difference between their growths. 4. A stuey on division of eggs of A. duodenale detected in the stool from a constipated person revealed that there were 41.6 per cent of degenerated eggs in the former half of the first stool-discharged for the first time in 6 days. This figure rose to 86.1 per cent when all the eggs had been incubated for 24 hours at 28℃. In the latter half of the stool there were 13.6 per cent of degenerated eggs immediately after it had been discharged. This figure rose to 56.8 per cent when all the eggs detected had been incubated for 24 hours at 28℃. No embryonated eggs were detected in such a stool. 5. When the density of hookworm, eggs in a given space was too high, they were prevented from growing in a normal way.
- 千葉大学の論文
- 1959-03-28