Kunert J
Department of Biology, Medical Faculty, Palacký University, Olomouc, Czechoslovakia.
Folia Parasitol (Praha). 1992;39(1):61-6.
The decomposition of egg-shells of Ascaris lumbricoides L. was studied microscopically using topochemical methods in a set of 32 strains of soil ovicidal fungi. It was found that even fungi displaying minimal chitinolytic activity in tests on purified chitin in vitro are able to dissolve chitin of egg-shells during the attack on live eggs. Fungi without any chitinolytic activity penetrate probably only the mechanically damaged eggs. None of the studied fungi was capable of degrading enzymatically the glycolipid (ascaroside) layer of the egg-shell which remained intact after digestion of all other components of the egg.
采用拓扑化学方法，在显微镜下研究了32株土壤杀卵真菌对蛔虫卵壳的分解情况。结果发现，即使在体外对纯化几丁质的测试中显示出最低几丁质分解活性的真菌，在攻击活卵时也能够溶解卵壳中的几丁质。没有任何几丁质分解活性的真菌可能只能穿透机械损伤的卵。在所研究的真菌中，没有一种能够酶解卵壳的糖脂（ascaroside）层，在卵的所有其他成分被消化后，该糖脂层仍保持完整。
