马来丝虫感染沙鼠治疗前后血清抗体水平的动态研究

STUDIES ON DYNAMIC OF ANTIBODIES DETECTED IN SERA FROM JIRDS INFECTED WITH BRVGIA MALAYI BEFORE AND AFTER TREATMENT

应用马来丝虫和牛丝虫(Setaria cervi)成虫冰冻切片抗原作间接荧光抗体试验(IFAT)及免疫酶染色试验(IEST),均能显示马来丝虫感染沙鼠治疗前后血清IgG及IgM水平的消长情况。两者高峰分别在感染后12～14wk及2～6wk。IgG水平与感染时间长短有密切关系,但与感染度无显著相关。感染沙鼠治后6个月抗体下降。认为用同种和异种抗原作IFAT及IEST,对感染沙鼠均具有诊断和考核疗效的价值。

Indirect immunofluoresent antibody test (IFAT) and immunoenzymatic staining technique (IEST), using frozen section of Brugia malayi and Setaria cervi adult worms, were applied to detect levels of IgG and IgM antibodies in jirds infected with Brugia malayi before and after treatment. Both methods could show the dynamic of antibodies during the course of infection. The peak of IgG and IgM antibodies were at the 12-14th week and 2-6th week after infection respectively. A high correlation was observed between the levels of IgG antibody and the period of infection, whereas the antibody titer had no relation with the density of infection. During 6 months after treatment, the levels of antibodies detected by IFAT and IEST using two antigens decreased to low litre. It is considered that IFAT and IEST using heterologous and homologcus antigens could be equally used for the serodiagnosis and the evaluation of cure in filariasis.