Epidemiological Update - Cholera - 4 May 2017

Cholera in the Americas - Situation summary

Between epidemiological weeks (EW) 1 and 14 of 2017, a total of 4,871 suspected cholera cases were reported in Haiti, including 69 deaths. During the same period, 62 suspected cholera cases were reported in the Dominican Republic, including two deaths.

The 4,871 cases reported in Haiti represent a 60% and 61% decrease compared to the 12,373 and 12,226 suspected cholera cases reported during the same period in 2015 and 2016, respectively (Figure 1). Figure 2 shows that this decrease has been constant over the 14-week period. The 69 deaths reported in 2017 represents a 41% and 50% decrease compared to the 116 and 139 deaths reported during the same period in 2015 and 2016, respectively. For the first 14 weeks of 2017, the in-hospital case fatality rate (CFR) was 1.2% compared to 0.9% for the whole of 2016 and 0.8% for the whole of 2015.

All 10 Departments of Haiti have reported suspected cholera cases during 2017. Between EW 11 and 14 of 2017, the rates of notified cases ranged from 39.5 to 3.2 per 100,000 population. The five departments with the highest rates in descending order are: Centre, Ouest (which includes the capital city of Port-au-Prince), Nippes, Artibonite, and Nord.

Similarly, the 62 suspected cholera cases reported in the Dominican Republic between EW 1 and EW 14 of 2017 represents a 73% and 91% decrease compared to the same period in 2015 and 2016. In fact, 679 suspected cases were reported in 2016 and 229 in 2015. While two deaths have been reported in 2017, 15 and 10 deaths were reported in 2016 and 2015, respectively. Overall CFR is 3.2% in 2017, 2.2% in 2016, and 4.4% in 2015. While 20 provinces (included the capital district) reported cases in 2016, only 10 provinces have reported cases in 2017.