Effect of praziquantel on certain immune responses of schistosomal egyptian patients

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Abstract
The lymphoproliferative blastogenic responses to mitogens, PHA and Con A, and to schistomose-derived antigens, S. mansoni worm and egg, were tested in 35 schistosomal patients and 10 healthy controls. Of the former group, 18 patients had intestinal mansoniasis and 17 had mansoniasis with hepatosplenomegaly. The test was repeated 2 weeks and 1 and 2 months after treatment with praziquantel. The delayed intradermal test for schistosomiasis was performed on 25 of the schistosomal patients and was repeated 1 month after treatment. Statistical analysis of results of lymphoproliferative blastogenic responses showed no significant differences between the control and the two schistosomal groups in response to mitogens. The group with intestinal mansoniasis responded significantly to both schistosomal antigens, compared to the control and hepatosplenic groups. Their proliferative responses showed a significant rise 2 weeks after treatment, then a gradual drop at 1 and 2 month intervals. The hepatosplenic group responded significantly to worm antigen before treatment; their proliferative responses to both schistosomal antigens showed a significant rise 2 weeks after treatment and remained raised thereafter. No relationship was established between either of the two schistosomal groups for age, intensity of infection or positive delayed intradermal reaction.

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