Bacterial enteric infections exact a heavy toll on human populations, parti
cularly among children. Despite the explosion of knowledge on the pathogene
sis of enteric diseases experienced during the past decade, the number of d
iarrheal episodes and human deaths reported worldwide remains of apocalypti
c dimensions. However, our better understanding of the pathogenic mechanism
s involved in the onset of diarrhea is finally leading to preventive interv
entions, such as the development of enteric vaccines, that may have a signi
ficant impact on the magnitude of this human plague. (C) 2001 Lippincott Wi
lliams & Wilkins, Inc.