A form of enterotoxemia caused by an infection of Type B "C. perfringens", affecting lambs whom are less than 3 weeks old. Lambs often die before displaying clinical signs, nonetheless common behaviours of lambs with this condition include, cessation of nursing, lethargy, and recumbency. Diarrhea is typical as well, death usually occurs within a few days.

Enterotoxemia is a condition induced by the absoption of large volumes of toxins produced by "Clostridum perfringens" from the intestines. There are several strains of "C.perfringens" (Type B, Type C & Type D) that may lead to the development of this gastrointestinal condition.