Was and still is
Diarrhea causes the rapid loss of body fluids
Unchecked death can occur in three days
(we don't see it here in America that much anymore but it is still prevalent in other countries around the world)
One of the first home remedies I learned to make in quantity was an anti-dehydration mix of boiled water (20 minute full rolling boil) sugar, lime juice and salt. Basically, Pedialite without the nice flavors. A nice big bowl of green banana and carrot soup and few gallons of that would keep you alive until your body healed itself.
Whether you wanted to live after a couple of days was another matter.
a.cricket