In Mexico, during autumn and winter, which correspond
to the cold-dry season, rotavirus has been reported as the
main etiologic agent of diarrheal disease in children aged
two years and under, and as has already been mentioned,
it is responsible for approximately 25%-50% of all gastrointestinal
cases [13,14]. Epidemiological studies show
a seasonal incidence of bacterial diarrheal disease mainly
during the summer months that coincides with the warmrainy
season [15-17].