HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Stirewalt, M. Search for Related Content PubMed PubMed Citation Articles by Stirewalt, M.

Quantitative Collection and Proteolytic Activity of Preacetabular Gland Enzyme(s) of Cercariae of Schistosoma Mansoni

Protease-containing preacetabular gland secretion can be collected from cercariae of Schistosoma mansoni by stimulation with penetration-inducing skin surface lipid, but the method lacks quantitative control because of variability of the lipid. Two commercially available free fatty acid fractions of skin lipid active in stimulating cercariae to penetrate skin, linolenic and linoleic acids, were substituted for skin surface lipid in a technique which provides an improved method of secretion collection. The pattern of protease activity of secreted enzyme(s) was followed throughout patency of infection of a group of snails with the same date of exposure. Day-to-day variability was a characteristic feature of all parameters studied. Major trends were elevated enzyme activity and cercarial emergence during midpatency.

Accepted for publication September 17, 1977.