Members of the genus Clostridium are extraordinarily diverse in their
natural habitats, and, when introduced to animal hosts, a few produce
acute and often fatal disease. In sheep and goats, as in many other sp
ecies of domestic animals, pathogenesis is often mediated by one or mo
re of the many toxic proteins produced by these organisms. Prevention
and control strategies are frequently based upon amelioration, by immu
noprophylaxis, of the effects of these molecules. In spite of their re
cognition for many years, clostridial diseases still present challenge
s to veterinary practitioners, diagnosticians and animal producers wor
ldwide. (C) Inra/Elsevier, Paris.