The morphogenesis of Ascaris suum to the infective third-stage larvae within the egg

被引：71

作者：

Geenen, PL ^{[1
]}

Bresciani, J ^{[1
]}

Boes, J ^{[1
]}

Pedersen, A ^{[1
]}

Eriksen, L ^{[1
]}

Fagerholm, HP ^{[1
]}

Nansen, P ^{[1
]}

机构：

[1] Royal Vet & Agr Univ, Dept Vet Microbiol, Danish Ctr Expt Parasitol, DK-1870 Frederiksberg C, Denmark

来源：

JOURNAL OF PARASITOLOGY | 1999年 / 85卷 / 04期

关键词：

D O I：

10.2307/3285733

中图分类号：

R38 [医学寄生虫学]; Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ; 100103 ;

摘要：

Studies of the morphology of Ascaris suum larvae developing in the egg during embryonation in vitro at room temperature showed that 2 moils take place within the egg. The first larval stage (L1) appeared in the egg after 17-22 days of cultivation, the first molt to the second larval stage (L2) took place from day 22 to day 27, and the second molt to the third larval stage (L3) started on day 27 and continued during the 60-day observation period. Infectivity of the eggs was studied by oral egg inoculation in mice and showed that the L3 are the infective stage for mice. Molting to the L3 stage occurs gradually over a period of 2-6 wk, and it is recommended to have an additional maturation period so the infectivity of an egg batch may reach maximum level.

引用

页码：616 / 622

页数：7

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