Informing humanitarians worldwide 24/7 — a service provided by UN OCHA

Brazil + 5 more

Epidemiological Update - Yellow Fever - 02 May 2017

Attachments

Situation summary in the Americas

Since epidemiological week (EW) 1 to EW 17 of 2017, Brazil, Colombia, Ecuador, Peru, the Plurinational State of Bolivia, and Suriname have reported suspected and confirmed yellow fever cases.

The following is an update on the situation in Brazil.

In Brazil, since the beginning of the outbreak in December 2016 up to 27 April 2017, there were 3,131 cases of yellow fever reported (715 confirmed, 827 suspected under investigation, and 1,589 discarded), including 392 deaths (240 confirmed, 113 discarded, and 39 under investigation). The case fatality rate (CFR) is 34% among confirmed cases.

According to the probable site of infection,1 the cases were reported in 399 municipalities, while the confirmed cases were distributed among 123 municipalities in 6 states (Espírito Santo, Minas Gerais, Pará, Rio de Janeiro, São Paulo, and Tocantins).

With regard to the confirmed fatal cases and their probable site of infection, 61 were in Espírito Santo, 165 in Minas Gerais, 4 in Pará, 3 in Rio de Janeiro, and 7 in São Paulo. In descending order, the CFR among confirmed cases by state is 100% in Pará, 41% in São Paulo, 34% in Minas Gerais, 30% in Espírito Santo, and 27% in Rio de Janeiro.

During the last week, no cases or epizootics were confirmed in new municipalities in the states of Espirito Santo, Minas Gerais, and Rio de Janeiro.

In Minas Gerais, the date of symptoms onset of the last confirmed case remains 14 March 2017, 2 while the additional 9 cases reported between the yellow fever bulletins published by the Brazil Ministry of Health on 193 and 264 April are cases with symptoms onset prior to that date.

In Espírito Santo, the majority of cases have been confirmed in the south-central part of the state, and the municipalities that account for 31% of the confirmed cases are Ibatiba (22),
Colatina (21) and Santa Leopoldina (20).

In Rio de Janeiro, the last case was confirmed on 20 April in the Maricá municipality. In São Paulo the date of symptoms onset of the last confirmed case is 6 April 2017.

To date, Aedes aegypti has not been reported to have a role in transmission. However, confirmed epizootics in large cities, such as Vitoria in Espírito Santo5 and Salvador in Bahia,6 represent a high risk for a change in the transmission cycle.