Map of nationwide study surveillance sites in Bangladesh, May 2014–June 2018, showing the percentage of culture-positive Vibrio cholerae among the enrolled cases with acute watery diarrhea. The map was created by R (v. 3.4.2, R Foundation for Statistical Computing, Vienna, Austria) and Arc GIS v10.6 (http://www.esri.com/ software/arcgis/arcgis-for-desktop). Abbreviations: BITID, Bangladesh Institute of Tropical and Infectious Disease; DMCH,Dhaka Medical College and Hospital; UAMC&H, Uttara Adhunik Medical College and Hospital.