Boulanger D. auteur aut IRD Schneider Dominique auteur aut IRD Sidikou F. auteur aut IRD Capron A. auteur aut IRD Chippaux Jean-Philippe auteur aut IRD Sellin Bertrand auteur aut IRD text journalArticle eng text/pdf reformatted digital access The infectivity of Schistosoma bovis cercariae administered orally was evaluated in Sahelian goats. Compared to the percutaneous route, a single massive oral dose resulted in a worm burden and in fecal egg excretion reduced by one-half. Surprisingly, tissue egg counts were increased by more than 4-fold. Fecundity of individual female schistosomes, was, therefore, markedly increased. When infective doses were administered weekly for 20 wk, both worm and egg burdens were doubled without modification of the individual worm pair fecundity. Repeated oral infections seem to have induced an acquired tolerance toward parasite antigens. These results confirm the epidemiologic relevance of the oral route in a host species inclined to become infected through drinking water rather than percutaneous exposures. (Résumé d'auteur) specialized SCHISTOSOMIASE HOTE VERTEBRE CHEVRE TRANSMISSION INFECTION ETUDE EXPERIMENTALE ETUDE COMPARATIVE INFESTATION EXPERIMENTALE NIGER NIAMEY 052SCHIST01 85 3 464-467 1999 0022-3395 https://www.documentation.ird.fr/hor/fdi:010026107 0022-3395 [F B010026107] https://www.documentation.ird.fr/hor/fdi:010026107 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_59-60/010026107.pdf IRD - Base Horizon / Pleins textes 2001-08-21 2018-08-17 fdi:010026107 fre