On June 7, 1926, W. V., a boy, aged 4 years, whose history did not reveal any acute illnesses, was brought to a medical clinic conducted by me, with the complaint that he had been subject to mild convulsive seizures for the past two years. The seizures did not appear from the meager description to be epileptiform. They were characterized by a few jerky movements of the head and arms following which he would "sit and stare for a few minutes." Physical examination did not reveal any obvious cause for the attacks, and no convulsive seizures were witnessed. A diagnosis was not made, but it was suggested that a thorough search of the stools be made for parasitic ova. A search was not made.
On July 12, at a subsequent clinic, the specimen, a portion of which is shown in figure 1, was brought in for identification, with the history