“…Grossly, evidence of colitis has never been seen in infancy such as was noted in one of the adult volunteers in the report of Formal, Dupont, Hornick, Snyder, Libonati, and Labrec (1971). Histologically, there is often no abnormality to be noted in the small or large intestinal mucosa, confirming the original observations of Bray (1945) and the later reports of Bray and Beavan (1948), Giles, Sangster, and Smith (1949), and Taylor, Powell, and Wright (1949). Reparative changes similar to those recorded in the two fatal cases of this outbreak have been seen from time to time with E. coli 055 and 0111 (Boyd, unpublished observations), but usually damage is of lesser severity than that described by Rozansky, Berant, Rosenmann, Ben-Ari, and Sterk (1964).…”