鉤虫卵並びに仔虫の発育に及ぼす酸素の影響に就いて
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概要
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It is the object of this paper to observe the influence of oxygen on the hookworm eggs and the larvae. In the studies reported here, the experiments on the influences of the thickness of the incubated faeces layer on the growth of the hookworm eggs are carried out, followed by the experiments on the aspect of the growth, hatching and survival of the hookworm eggs and the larvae in anaerobic jar at 70℃, as well as on the aspects of the growth and hatching of the hookworm eggs in anaerobic jar at 38℃. The results were obtained as follows. 1) When the faeces containing the eggs of Necator americanus were thickly streaked and incubated on the tile at 27℃, the rate of the hatching was 52 % at 24 hours after the incubation. However, when the egg faeces were thickly streaked, and incubated on the tile at 27℃, no growth of the eggs was demonstrated at even 24 hours after the incubation, having, showed no remarkable differences from the egg states of pre-incubation. 2) Under the anaerobic conditions at 27℃, neither growth nor hatching in the early stages of each of Ancylostoma duodenale and Necator americanus eggs were demonstrated after the incubation for 26 days of more and 14 days or more, respectively. Under the same conditions, the hatching abilities of embryonated eggs of Ancylostoma duodenale and Necator americanus were perfectly destroyed within 18 days and 14 days after the incubation, respectively. The infective larvae of each of Ancylostoma duodenale and Necator americanus were perfectly died within 20 days and. 12 days after the anaerobic incubation at 27℃, respectively. 3) Under the anaerobic conditions at 38℃, the growth in the early stages of each of Ancylostoma duodenale and Necator americanus eggs were inhibited within 5 days and 1 day after the incubation, respectively. The hatching abilities of the embryonated eggs of each of Ancylostoma duodenale and Necator americanus wese destroyed within 5 days and 1 day after the incubation, respectively.4) Under the anaerobic conditions at 27℃ and 38℃, the Ancylostoma duodenale eggs were more tolerable than the Necator amercanus eggs.
- 千葉大学の論文