Four additional serotypes of Arizona bacteria

Four additional serotypes of Arizona bacteria were characterized antigenically and biochemically. They were 22 : 27 : 28a, 28b; 9a, 9b : 24: 30; 21 : 24: 28a, 28b; and 26a, 26b : 23 : 31. The first serotype was isolated from human feces; no information as to the source of the second was available. The third serotype was recovered from water from a tank in which turtles were kept, and the fourth was isolated from a stool specimen from a human.