A 34-year-old male farmer presents with frequent diarrhea and vomiting for 1 day (approximately 20 episodes), watery stools, calf muscle cramps, and no significant abdominal pain. Examination shows clear consciousness, signs of severe dehydration, BP 60/40 mmHg, plasma specific gravity 1.035, hematocrit 60%, WBC 18×10⁹/L, and stool microscopy with 0-2 WBC/HP. Stool suspension and smear tests suggest a preliminary diagnosis of paracholera. What is the most common gastrointestinal symptom pattern in cholera and paracholera?