广州管圆线虫Mr32000抗原的免疫诊断效果评价

目的 价广州管圆线虫Mr32000抗原(AC32)的诊断价值．方法 利用切胶纯化法从广州管圆线虫成虫抗原中获取AC32，用Western blotting和ELISA方法检测61例广州管圆线虫感染大鼠血清、5例正常鼠血清、1例广州管圆线虫病人血清、50例其他寄生虫体阳性患血清和50例献血员血清。结果AC32和成虫粗抗原包被的ELISA检测61份感染大鼠血清和1例临床诊断为广州管圆线虫病人血清均为阳性：AC32．ELISA检测的50例献血员、20例急性血吸虫病人、11例弓形虫病人和所检测的其他寄牛虫抗体阳性患血清均为阴性。结论AC32在广州管圆线虫病的血清学诊断中具有较高的敏感性和特异性。

Value of the antigen with molecular mass of 32 000 in immunodiagnosis of Angiostrongylus cantonensis]

OBJECTIVE: To evaluate the specificity and sensitivity of immunodiagnosis with the antigen with molecular mass of 32 000 of Angiostrongyliasis cantonensis(AC32). METHODS: The major antigenic protein AC32 was purified from the antigens of A.cantonensis adult worm by electroelution from SDS-polyacrylamide gels. AC32-enzyme linked immunosorbent assay (ELISA) and adult worm antigen (AWA)-ELISA were used to detect the specific IgG in the sera of normal rats (n=5) and rats with angiostrongyliasis (n=61), sera of healthy individuals (n=50) and patients (n=50) with angiostrongyliasis, schistosomiasis and other parasitosis. RESULTS: The positivity rate in AC32-ELISA of the sera from rats with angiostrongyliasis was 100%; without false positive results or cross reaction between AC32 and the sera of the normal control and patients infected with parasites other than A.cantonensis. CONCLUSION: AC32 of A.cantonensis is a valuable candidate antigen for immunodiagnosis of angiostrongyliasis with high sensitivity and specificity.