Update: Vibrio cholerae O1--Western Hemisphere, 1991-1994, and V. cholerae O139--Asia, 1994.

The cholera epidemic caused by Vibrio cholerae O1 that began in January 1991 has continued to spread in Central and South America (Figure 1). In southern Asia, the epidemic caused by the newly recognized strain V. cholerae O139 that began in late 1992 also has continued to spread (Figure 2). This report updates surveillance findings for both epidemics.