中国寄生虫学与寄生虫病杂志 ›› 2005, Vol. 23 ›› Issue (2): 3-77.

• 论著 • 上一篇    下一篇

旋毛虫在小鼠先天性传播的初步研究

王中全;韩化敏;崔晶   

  1. 郑州大学医学院寄生虫学教研室,郑州 450052
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-04-30 发布日期:2005-04-30

Preliminary Study on Congenital Transmission of Trichinella spiralis in Mice

WANG Zhong-quan;HAN Hua-min;CUI Jing   

  1. Department of Parasitology, Medical College of Zhengzhou University, Zhengzhou 450052, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-04-30 Published:2005-04-30

摘要: 目的?摇研究旋毛虫在小鼠的先天性传播并观察母鼠抗旋毛虫抗体对攻击感染的保护作用。 方法 将昆明小鼠分为受孕后感染组和感染后受孕组,子鼠出生后1 d内剖杀,检查旋毛虫幼虫;将正常母鼠所产子鼠由感染旋毛虫的母鼠喂养,21 d后宰杀,检查旋毛虫幼虫。用间接ELISA检测感染母鼠所产子鼠出生后不同时间的血清抗旋毛虫抗体,观察母鼠抗旋毛虫抗体对攻击感染的免疫保护。 结果 受孕后7 d感染旋毛虫的母鼠所产的6只子鼠中有2只感染旋毛虫;感染旋毛虫后8 d和22 d受孕雌鼠所产子鼠的感染率分别为20%(2/10)和25%(2/8),从子鼠检获的旋毛虫均是未成囊的幼虫。交叉哺乳实验表明正常母鼠所产的30只子鼠未见旋毛虫感染。感染母鼠所产27只子鼠出生后1、7、24及40 d的血清抗体阳性率分别为100%、100%、77.8%及14.8%,子鼠出生后40 d攻击感染的减虫率为62.0%;感染母鼠所产子鼠血清被动转移小鼠的减虫率55.7%,与对照组比较差异有显著性(P<0.01)。 结论 旋毛虫在小鼠可经胎盘传播,母鼠的抗旋毛虫抗体对子鼠抗攻击感染可能具有部分保护作用。

关键词: 旋毛虫, 先天性传播, 交叉哺乳, 免疫保护

Abstract: Objective To study congenital transmission of Trichinella spiralis in mice and observe the protection of anti-Trichinella antibodies from the infected dams to challenge infection. Methods According to the gestation (fertilization), the Kunming mice were divided into two groups: the infected group after gestation and the gestated group after infection. New-born mice were cut into small pieces to separate the larvae within 1 day after birth. One-day-old offspring born to normal dams were nursed by the infected dams, slaughtered after 21 days and examined for the larvae. Serum anti-Trichinella antibody level in offspring born to the infected dams was assayed by ELISA at different time after birth, and its immune protection against challenge infection was studied. Results Out of 6 offspring born to the dams infected at 7 days after fertilization, two were found to be infected. Among other female mice which were first infected with T. spiralis and then gestated, only the offspring born to the dams fertilized at 8 and 22 days after infection were found to be infected, the infection rate of offspring was 20% (2/10) and 25%(2/8) respectively. All larvae recovered from the young were non-encapsulated. The cross-fostering experiment showed that none of 30 offspring born to normal dams were found to be infected. The serum antibody positive rate in 27 offspring born to the infected dams at 1, 7, 24, and 40 days after birth was 100%, 100%, 77.8% and 14.8%, respectively. The worm reduction rate in the offspring 40 days after birth was 62.0% after challenge infection. The worm reduction rate in mice in which sera from the offspring born to the infected dams were passively transferred was 55.7%, there was a significant difference (P<0.01) compared to the control group. Conclusion A transplacental transmission of T. spiralis is revealed in mice. Anti-Trichinella antibodies from the infected dams may partially protect the young from challenge infection.

Key words: Trichinella spiralis, Trichinella spiralisCongenital transmission, Cross-fostering, Immune protection