Patient description: A 34 year old man comes to the clinic complaining of dizziness and severe diarrhea since yesterday. He has returned from an international trip few days ago and was living in a camp in Sudan for a month. He developed abdominal pain followed by bloating and nausea as well as loose bowel movements. Soon he was having profuse watery diarrhea without odor. The stool is watery and white but the patient has no fever. Blood pressure is 95/62 lying down and drops to 75/40 standing. The skin turgor has reduced. HR is 110 and he looks ill with dry mucosa. V. cholerae was seen in dark-field microscopy of a fresh stool specimen. The lab study is as bellow: Sodium 137 meq/L Potassium 2 meq/L Chloride 94meq/L CO2 15 meq/L Fecal leukocytes None seen Fecal occult blood Negative

Clinical trial eligibility criteria: eligible ages (years): 0.0-0.058,  Infant Development Infants will be eligible to participate if they meet all of the following conditions. At birth the infant must be: Only infants whose parent(s) or legal guardian(s) have decided to feed infant formula as the sole source of nutrition, will be approached for potential study enrollment 1. Healthy, term (early term/no less than 37 weeks, 0 days through late term/no greater than 41 weeks, 6 days), singleton infant 2. Have a birth weight of ≥ 2500 grams At the time of the baseline/enrollment visit, infants must be: 1. Designated as healthy by a physician 2. ≤21 days post-natal age (Date of Birth = Day 0) 3. Weight for age ≥ 5th and ≤ 95th percentile for age according to sex-specific World Health Organization (WHO) growth charts 4. Length for age ≥ 5th and ≤ 95th percentile for age according to sex-specific World Health Organization (WHO) growth charts 5. Head circumference for age ≥ 5th and ≤ 95th percentile for age according to sex-specific World Health Organization (WHO) growth charts 6. Weight for length for age ≥ 5th and ≤ 95th percentile for age according to sex-specific World Health Organization (WHO) growth charts 7. Exclusively consuming and tolerating a cow's milk infant formula at time of enrollment 8. Have parent(s) or legal guardian(s) who agree to feed the study formula to the study subject as his/her sole source of nutrition for the duration of the study 9. Have parent(s) or legal guardian(s) who have read and voluntarily signed an Informed Consent form approved by the Institutional Review Board prior to any participation in the study  Infants will be ineligible if they have any of the following conditions that are judged by a physician to interfere with the infant's normal growth, development, and/or tolerance to an infant formula: 1. Infants showing evidence of anatomic and physiologic defects of the respiratory tract, or other congenital defects (as determined by the clinician) 2. Evidence of chronic hepatic, gastrointestinal, renal, cardiac, pulmonary, or neurological diseases 3. Having a maternal history with known adverse effects on the fetus and/or the newborn infant, such as diabetes (gestational diabetes is acceptable if infant's birth weight is < 4300 g), active tuberculosis, perinatal infection, 4. Having a family history of cow's milk protein intolerance/allergy 5. Are an infant from a multiple birth (twin, triplet, etc.) 6. Mothers who smoked cigarettes 7. Mothers who used illicit drugs during pregnancy