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Acute watery diarrhea surveillance during the Rohingya Crisis 2017-2019 in Cox's Bazar, Bangladesh. INTRODUCTION: Forcibly Displaced Myanmar Nationals fled into Cox's Bazar, Bangladesh due to internal conflict. Considering the public health situation, a surveillance network was established to identify the enteric pathogens and early detection of cholera epidemics. Purpose of this manuscript is to report the clinical, epidemiological determinants of cholera and other enteric pathogens among hospitalized diarrhoeal patients from FDMNs and host community. METHODOLOGY: A total of 11 sentinel surveillance sites were established around the camps in Ukhia and Teknaf Upazila, Cox's Bazar. Rapid diagnostic testing was conducted for immediate detection of cholera cases. Stool samples were transferred to the icddr,b laboratory for culture. RESULT: A total of 8134 participants with diarrhea were enrolled from 2017- 2019: 4881 were FDMNs and 3253 from the Bangladeshi host community. Among the FDMNs, the proportion of V. cholerae 0.7%, ETEC 4.9% and Shigella 1.5%. The distributions from host community were 1.2% V. cholerae, 1.8% ETEC and 1.1% Shigella. Similar risk factors have been identified for the diarrhoeal pathogens for both communities. CONCLUSION: This surveillance helped to monitor the situation of diarrheal diseases including cholera in refugee camps as well as in the neighboring host community. These findings lead policy makers to take immediate preventive measures.