It is not surprising that trichinosis is incorrectly diagnosed when first seen in the majority of instances because it so closely simulates other much more common diseases. The mistake is particularly apt to occur in patients who develop the disease during the winter months when so-called grip is prevalent. The muscle pains, fever, profuse perspiration and prostration are very similar in the two diseases and, when headache is severe, an infection of the sinuses is often thought to be present. The edema about the eyes is sometimes erroneously attributed to the same cause. The presenting symptoms vary greatly. "Heaviness in the stomach," eructations, loss of appetite, nausea, sometimes associated with vomiting and at times accompanied by colic, especially nocturnal, and frequently diarrhea focus attention on the gastro-intestinal tract. Two of the patients admitted to the Hartford Hospital during recent years gave diarrhea as the outstanding complaint. During the first week