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AUTORADIOGRAPHIC STUDY OF THE attrition OF MIGRATING SCHISTOSOMULA IN THE SKIN OF MICE *** challengeD WITH NORMAL *** CERCARIAE AFTER IMMUNIZATION WITH HIGHLY IRRADIATED CERCARIAE

引用

Chinese Medical Sciences Journal 1990年第1期8卷 30-36页

作者： S.Y.Li Hsu H.F.Hsu J.W.Osborne W.R.Clarke C.K.Hawk Y.Ohnishi College of Medicine University of IowaIowaUSA

The migratory pattern and attrition of75Se-labelled *** challenge cercariae in CF1mice immunized 0,1,3, or 5 times with 12kR-or 48kR-irradiated cercariae were investigatedby compressed organ *** were percutaneously inoculated with 500-1000 cer-cariae for each immunization and with a known count of approximately 90 cercariae at adifferent site for *** skin,lungs,liver,other organs,and catrcass were processedfor *** and mesenteric perfusions for worm collection were alsosampled from day 19 through *** naive tnice,25% of challenge cercariae died in *** attrition of challenge cercariae in mice immunized with 12kR-irradiated cercariaewas 43% with 1 immunization,54% with 3,and 58% with 5,whereas in mice immunized with48kR-irradiated cercariae,skin,attrition was48% with 1,63% with 3,and 76% with 5 *** all immunized mice,a high percentage of migrating sehistosomula died in the skinwithin 24 hours of a challenge *** autoradiography,it was found that thesilver foci created by single labelled worms were difficult to differentiate from those of *** study documents the induction of acquired resistance against a challenge infectionin the skin by vaccination with highly irradiated cercariae,with the degree of attemtation ofimmunizing cercariae and the number of immunizations being closely related to the *** in the ***,we discuss the contradictory views concerning the site of attritiotn ofchallenge cercariae.

关键词： autoradiography attrition—challenge cercariae immunization—highly X-irradiated cercariae Schistosoma mansoni

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