Next Generation ORS: Comparing ORS With Calcium vs Standard ORS in Reducing Severity of Acute Watery Diarrhea

Inclusion Criteria: * Adult male and female patients, age between 18 and 60 years, history of acute watery diarrhea (defined as the passage of ≥3 loose or watery stools in the past 24 hours) for less than 24 h before admission, either signs of severe dehydration and stool positive for Vibrio cholerae, and successful rehydration with intravenous fluids within the first 6 h after admission (cholera group), or signs of some dehydration and stool negative for V. cholera (non-cholera group) , and successful rehydration with intravenous or oral fluids within the first 6 h Exclusion Criteria: * Pregnancy as determined by history of last menstrual period, bloody diarrhea, signs of systemic infection that needed intravenous antibiotics, or inability to rehydrate with intravenous fluid therapy in the first 6 h after admission.