卫氏并殖吸虫感染循环抗原检测方法的建立与应用

Establishment and Application of Circulating Antigen Detection in Paragonimus westermani Infection

用CAg-dot-ELISA法和CAb-ELISA法分别对并殖吸虫病临床诊断患者、并殖吸虫病流行区人群、卫氏并殖吸虫早期感染者及其他寄生虫感染者进行循环抗原和抗体检测。用CAg-dot-ELISA检测70份卫氏并殖吸虫病临床诊断患者血清,阳性29份,敏感性为41.5%(29/70),与华支睾吸虫病和日本血吸虫病患者血清分别有25%(5/20)和20%(4/20)的交叉反应,与其他寄生虫感染者血清和健康人血清(60份)均为阴性,特异性为93.6%。CAb-ELISA检测70例卫氏并殖吸虫病临床诊断患者血清阳性67份,敏感性为95.7%(67/70),与华支睾吸虫病和日本血吸虫病患者血清分别有25%(5/20)和20%(4/20)的交叉反应,对其他寄生虫感染者血清和健康人血清的特异性为92.1%。CAg-dot-ELISA和CAb-ELISA分别检测并殖吸虫病流行区人群220份血清,阳性率分别为0和3.2%(7/220)。CAg-dot-ELISA法对辅助诊断并殖吸虫早期感染有一定价值。

Circulating antigen and antibody were detected by CAg-dot-ELISA ＆ CAb-ELISA respectively on the clinically confirmed patients of paragonimiasis, people in paragonimus endemic area, cases with early infection of P. west- ermani, and casess with other parasitic infections. Circulating antigen was detected in 29 out of 70 cases with paragonimiasis with a sensitivity of 41.5%. The rate of cross reaction in cases with clonorchiasis sinensis and schistosomiasis was 25% （5/20） and 20% （4/20）, respectively, and it was negative in 60 casess with other parasitic infections and healthy subjects, with an overall specificity of 93.6%. Specific antibody was detected in 67 of 70 cases with paragonimiasis with a sensitivity of 95.7%. The cross reaction rate in cases of clonorchiasis sinensis and schistosomiasis was 25%（5/20） and 20%（4/20）, but negative in 60 casess with other parasitic infections and healthy subjects, with a specificity of 92.1%. 220 persons from paragonimus endemic area were all negative in antigen detection and 7（3.2%） showed antibody positive. Dot-ELISA for circulating antigen detection may be helpful in diagnosing early infection of P. westermani.