Abstract
One-half of 16 antibiotics, non-antibiotic metabolic inhibitors, molluscicides and anti-schistosomal agents tested suppressed molluscan Schistosoma mansoni. In addition to chloramphenicol which had previously been shown to do so, 3 other antibiotic inhibitors of protein synthesis also suppressed the disease (puromycin, erythromycin and streptomycin) as did both non-antibiotic metabolic inhibitors (6 mercaptopurine and methotrexate) and all 3 antischistosomal agents (antimony potassium tartrate, stibo-phen and lucanthone hydrochloride). Methotrexate was the 1st drug found to eradicate the infection rather than merely suppress it, and lucanthone hydrochloride is the most potent drug discovered. In addition to suppression of the disease at 0.4 ppm, it completely prevents snail growth and egg laying at a concentration of 0.3 ppm.

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