Abstract
Several salt solutions were compared for their effectiveness in increasing the incidence of Zygocotyle lunata infections in white rats. Sodium bicarbonate appears to be more effective than mono- and dibasic sodium phosphate, potassium bicarbonate, and dibasic potassium phosphate in increasing the size of Z. lunata infections as determined by worm yield. Worm recovery, relative to the number of metacercariae administered, increased substantially if the latter were administered in 1.5 to 2 ml 3% NaHCO3 and the host was given an additional 2 ml 3% NaHCO3 0.5 hr. later.

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