Stradowski M
Department of General Biology and Parasitology, Institute of Biostructure, Medical School, Warszawa, Poland.
Wiad Parazytol. 1995;41(1):33-41.
Variable position of genital ducts and pores (PGP) was found in 23.3% of five months old tapeworms obtained as a result of administering to rats a dose of 6 cysticercoids proceeding from the third generation of inbred Hymenolepis diminuta--WMS il1. In tapeworms coming from generations no 18 and 32 PGP changes were reported only in 7.5 month, with only 5.9% of strobilas in the 32 generation group being characterized by this feature. These results indicate a time shift with respect to the appearance of PGP changes in tapeworms proceeding from latter inbred generations to a further period of tapeworm invasion in rats. The number of PGP changes is positively correlated with the number of type 2p1a proglottids (two testes on the poral and one on the aporal side). The average number of type Op3a proglottids increases with the number of generations. In 5-month old tapeworms of unilateral PGP coming from generation no 3, 18 and 32 it amounts to 5.9%, 6.6% and 8.1%, respectively.
在给大鼠投喂源自近交系微小膜壳绦虫第三代——WMS il1的6个似囊尾蚴后获得的5月龄绦虫中，发现生殖管和生殖孔（PGP）位置可变的情况占23.3%。在来自第18代和第32代的绦虫中，PGP变化仅在7.5月龄时被报道，在第32代组中只有5.9%的节片具有这一特征。这些结果表明，与源自近交系后代的绦虫中PGP变化的出现相比，大鼠体内绦虫侵袭的进一步阶段存在时间上的偏移。PGP变化的数量与2p1a型节片（poral侧有两个睾丸，aporal侧有一个睾丸）的数量呈正相关。Op3a型节片的平均数量随代数增加。在来自第3代、第18代和第32代的单侧PGP的5月龄绦虫中，其分别占5.9%、6.6%和8.1%。
