有輪条虫卵の孵化機転に関する実験的研究

概要

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This experiment was carried out to find the factors affecting the hatching of onchospheres of Raillietina cesticillus in vitro. The results are summarized as follows. 1. The hatching process of onchosphres is considered to occur at three stages: 1) the movement of embryonal hooks and onchospheres, 2) the escape of onchospheres from the embryophore resulting from the mentioned-above movement, and 3) the escape of onchospheres, which has been set free from the embryophore, from the outermost utterine shell. The escaping position of onchospheres from the embryophore and the uterine shell is not definitely decided. 2. Osmotic pressure of environment is not essential for hatching onchospheres. 3. Lipase, pepsin, trypsin, pancreatin and sodium cholate are not effective in the hatching of onchospheres. 4. Hatching is induced in KCl, NaHCO_3, NaCl, Na_2SO_4, MgCl_2, Cacl_2, KNO_3, HaH_2PO_4 and NaNO_3 solutions. The most effective salt solution to induce the hatching is the 0.135 mole solution of KCL. 73 per cent hatching is induced in 30 minutes. 5. From the results of the tests with the various hatching salt solutions, it is concluded that chlorine ion as well as sodium ion exerts the favourable effects on the hatching of onchospheres.
社団法人日本動物学会の論文
1960-04-15