THE PAST 10 years have seen the development of a number of new drugs effective in the treatment of intestinal parasitoses, including particularly several amebicidal drugs and piperazine preparations used in ascariasis and enterobiasis. Nevertheless, improved results in antiparasitic therapy have been due as much to a better understanding of the principles of diagnosis and appreciation of the natural history of the infections as to the use of new therapeutic agents.Diagnostic methods have been measurably improved in amebiasis. First of all two old myths have been dispelled. Proctoscopy has been shown to be less dependable than adequate stool examination,1 and the unreliability of distinguishing the active stage of Entamoeba histolytica from that of other amebas on the basis of motility alone is now acknowledged and widely known. New methods for preserving stool specimens make it possible for patients to be diagnosed and treated at a distance from
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