An unexpected activity of β-cyclodextrin, an excipient used in pharmaceutical technology, was observed against Cryptosporidium parvum. The viability and infectivity of purified oocysts, exposed for 24 hr to β-cyclodextrin (2.5% suspension), were evaluated by inclusion/exclusion of 2 fluorogenic vital dyes and a suckling murine model, respectively. Results of the viability assay showed a high proportion of nonviable oocysts (81.5%). The intensity of experimental infection, determined 7 days postinoculation by examination of intestinal homogenates, was significantly lower (P < 0.05) than in the control litters. The preventive and curative efficacies of β-cyclodextrin suspension were also evaluated in experimentally infected neonatal mice. Infection was prevented when the suspension was administered 2 hr before inoculated oocysts and on days 1 and 2 postinoculation.
UNEXPECTED ACTIVITY OF β-CYCLODEXTRIN AGAINST EXPERIMENTAL INFECTION BY CRYPTOSPORIDIUM PARVUM
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José A. Castro-Hermida, Francisco Freire-Santos, Ángel M. Oteiza-López, Elvira Ares-Mazás; UNEXPECTED ACTIVITY OF β-CYCLODEXTRIN AGAINST EXPERIMENTAL INFECTION BY CRYPTOSPORIDIUM PARVUM. J Parasitol 1 October 2000; 86 (5): 1118–1120. doi: https://doi.org/10.1645/0022-3395(2000)086[1118:UAOCAE]2.0.CO;2
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