Epidemiological Update – Cholera – 28 December 2017

December 29, 2017
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Cholera in the Americas – Situation summary

In the Americas Region, between epidemiological week (EW) 1 and EW 50 of 2017, a total of 13,582 suspected cholera cases were reported on the island of Hispaniola, of which 99% occurred in Haiti (13,468 cases, including 157 deaths). 1 During the same period, 62 suspected cholera cases were reported in the Dominican Republic, including two deaths.

Both the Dominican Republic and Haiti reported a decrease in cases in relation to 2016. However, the decrease in Dominican Republic is greater with 12.8 to 1.21 cases per hundred thousand inhabitants in 2016 and 2017 respectively, while in Haiti reported cases dropped from 3.74 to 1.10 cases per hundred thousand inhabitants.

In Haiti, the cases reported between EW 1 and EW 50 of 2017 (13,468) represent a decrease of 68% with respect to the cases notified since EW 1 and EW 52 of 2016 (41,421) and is the lowest reported cases since the outbreak started in Haiti in October 2010 (Figure 1). Nevertheless, there are still 200–300 suspected cases reported each week. Between EW 47 and EW 50 of 2017, suspected cases were reported in 9 of the 10 Departments, although four Departments (Artibonite, Centre, Nord-Ouest and Ouest) account for 90% of the cases. In the same period, the average number of cases reported exceeded what was reported in the preceding weeks, mainly with the increases observed in the Nord (36% increase) and Nord-Ouest (19% increase) departments.

Similarly and comparatively between 2016 and 2017 the number of deaths reported decreased by 65% (from 447 to 157 deaths) and represents the lowest number of deaths reported since 2010.

In the Dominican Republic, between EW 1 and EW 50 of 2017, a total of 119 suspected cholera cases were reported representing a 90% decrease compared to cases reported in 2016 (1,149 between EW 1 and EW 52); this decrease is similarly observed with respect to deaths reported, there was an 85% decrease in 2017 compared to those reported in 2016.

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