The third case of human infection with Mesocestoides in the United States is reported in a 14-month-old child living in New Jersey. Clinical findings were essentially normal and epidemiologic investigation failed to reveal the source of the infection. Treatment with pyrvinium pamoate, piperazine, and quinacrine failed to rid the child of worms. At age 27 months, the child was given 1 g of niclosamide (Yomesan®). Stool examined 1 week, 3 months, and 5 months later revealed no evidence of parasitism. This is the 13th case of Mesocestoides in man reported in the literature.
In charge of Protozoology Diagnostic and Research Laboratory, Parasitology Branch, Center for Disease Control, Atlanta, Georgia 30333.
Physician in charge of the case, Mendham, New Jersey 07945.
Epidemic Intelligence Service Officer, Parasitic Disease Section, Center for Disease Control. Present address: The Rockefeller University, New York City, N. Y. 10021.