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Example 51
The NOD SCID gamma mouse model of chronic, asymptomatic C. parvum infection was used to test in vivo compound efficacy. NOD SCID gamma mice were infected with ˜1×105 C. parvum oocysts by oral gavage 5-7 days after weaning. The infected animals begin shedding oocysts in the feces 1 week after infection, which is measured by quantitative PCR (qPCR). Based on experience with the positive control compound paromomycin, four mice are required per experimental group to achieve 80% power to detect an 80% percent reduction in parasite shedding after four days of drug compound. In additional to the experimental drug regimen groups, additional negative (gavage with DMSO/methylcellulose carrier) and positive (paromomycin 2000 mg/kg once daily) control groups are included in each experiment. Mice are infected 5-7 days after weaning (day −6), infection is confirmed 1 week later (day 0), and experimental compounds are dosed by oral gavage on days 1-4. The dosing frequency was as indicated. Treatment efficacy was assessed by measurement of fecal oocyst shedding by qPCR on day 5.
Example 3
In some experiments, high fructose corn syrup or another carbohydrate syrup was used without further processing as flux agent. In other experiments, a portion of the flux agent was prepared as follows:
A 200 mL plastic container was weighed and labeled. Approximately 150 g of fructose or a carbohydrate syrup was added to the container. Recovered volatiles from a coal conversion process described in U.S. Pat. No. 8,226,816 and US Published Patent Application 2015/0083570 were obtained by collection from vacuum distillation step. These recovered volatiles included a mixture of hydrocarbons with boiling points ranging from about 80° C. to about 300° C. About 7.5 g of recovered volatiles were added to the fructose or carbohydrate syrup in the plastic container.
The plastic container was then sealed and shaken vigorously by hand for 60 seconds to mix the components of the flux agent. No change was observed after an additional 60 seconds of shaking and the mixture was then considered homogeneous.