Three infants under 4 months of age with histories of having vomited blood were seen within a relatively short period of time in 1925. Examination of the stools revealed the persistent presence of occult blood over a period of several weeks. As perusal of the literature brought little to light on the subject, it was decided to study the stools of infants of this age regardless of the history of hematemesis. The fact that occult blood was frequently found in the stools led to a similar examination of the stools of a series of newly born infants. Two years later, the stools of another series of new-born infants were examined in the same way.
Macroscopic and occult blood have been known to be present in the meconium for a long time, but little mention has been made of the frequency of occult blood in the later stools of the