1.THE FIELD TRIAL ON RAPID DETFCTION OF SCHISTOSOMA CIRCULATING ANTIGENS WITH DOT IMMUNOGOLD FILTRATION ASSAY (DIGFA)
Xiaoxian GAN ; Liying SHEN ; Jianzu DING ; Huiying SHEN
Chinese Journal of Zoonoses 2000;(2):19-20
A total number of 2221sera collected from different kinds of subjects , i.e.patients with various stages of schistosomiasis. normal individuals, persons with other parasitic diseases or non-parasitic diseases, were detected with Dot Immunogold Filtration Assay (DIGFA) using anti-SVLBP IgG as capturig antibody. Positive rate of 70 sera from patients with acute schistosomiasis was 100%, and that of 307 sera with chronic schistosomiasis was 68.4% .None of 200 sera from normal individuals showed false positive reaction. No obvious cross reaction was found in sera from other parasitic/non-parasitic diseases except sera from patients with paragonimiasis.2 batches of sera were detected with DIGFA by single-blindness method. Results showed that sensitivities to chronic schistosomiasis were 69.4% and 68.9%, and 100% to acute schistosomiasis while specificities were 98.9%-99% .508 samples from residents in endemic areas were tested with DIGFA and Kato-Katz. Positive rate of circulating arrtigen was 20.9% with DIGFA while 65 samples were positive with stool examination.46 samples were positive both by DIGFA and by Kato-katz.The coincidental rate was 70.8% .These results indicated that DIGFA showed sensitive and specific in the detection of circulating antigen. It will be useful in mass application and vahuable in epidemiological stuvey.
2.Observation on the Change of Anti-S.japonicum Antibody Level in Population Migrated from Outside Embankment to New Town
Liyong WEN ; Shaohong LU ; Junhu CHEN ; Jianfeng ZHANG ; Liling YU ; Jianzu DING ; Xiaolan YAN ; Liying SHEN ; Wei ZHENG ; Lulu GAO ; Tianping WANG ; Shiqing ZHANG ; Gengxin CHEN ; Yun YE ; Xiaonong ZHOU ; Jiang ZHENG
Chinese Journal of Parasitology and Parasitic Diseases 1987;0(02):-
Objective To detect the change of the anti-S. japonicum antibody level after people migrated from outside embankment to newly established town. Methods Three pilot spots were established for the investigation: one spot thut both inhabitancy and cultivation disused (A), one spot that only inhabitancy disused but farming continued (B) and the third one served as control (C). DIGFA and ELISA were used to detect the antibody level in the populations from 2002 to 2005. Results The positive rate of anti-S.japonkum antibody declined significantly from 6.63% to 3.52% by DIGFA and from 7.26% to 3.71% by ELISA at spot A (X2=5.2625, P