The parenteral (muscle) larvae of Trichinella spiralis were found much more susceptible than previously reported to the deleterious effect of ethanol in vitro. Larvae were reversibly paralyzed when immersed for 6 hours in water containing 6% ethanol; at concentrations of 12-25%, the paralysis was irreversible. When trichinous meat was digested in artificial gastric juice containing 6-12% ethano...