Objectives: Cholera is an emergent infection due to Vibrio cholerae. Studying clinical and biochemical characteristics of cholera helps doctors in diagnosis, treatment, following up and prognosis. Aims: 1. To determine some clinical and biochemical characteristics of cholera patients in 2010 epidemics in Ben Tre province. 2. To evaluate the relation of leucocytosis to diarrheal duration. Materials and methods: Patients diagnosed as cholera treated in Nguyen Dinh Chieu Hospital and Cu Lao Minh Hospital, Ben Tre province, since May 2010 to September 2010. Results: 54 patients were enrolled in this study (males 16, females 38). All patients had Ogawa positive. More than 60% pts stayed in hospitals over 96 hours. Most of pts had diarrheal duration over 48 hours, 44.5% more than 72 hours. 20.3% pts had water loss in level 3. 50% pts had leucocytosis, in them 16.7% had over 15.109/L. 18,5% had acute renal failure. Group with leucocytosis had higher rate of diarrhoea over 72 hours than group without leucocytosis (77.7% vs. 36%). Conclusions: 1. Most of pts had long diarrheal duration. 20.3% pts had water loss in level 3. 50% pts had leucocytosis, in them 16.7% had over 15.109/L. 18,5% had acute renal failure. 2. Leucocytosis may be related to the diarrheal duration.