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Epidemiological Update - Yellow Fever - 16 February 2017

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Situation summary in the Americas

Since epidemiological week (EW) 1 to EW 5 of 2017, Brazil, Colombia, Peru, and the Plurinational State of Bolivia, have reported yellow fever cases. Colombia and Peru have reported probable cases, one and three respectively; the Plurinational State of Bolivia reported a case under investigation while Brazil has reported confirmed and suspected cases under investigation.

The following is a situation summary in Bolivia and Brazil.

The Bolivia Ministry of Health reported a yellow fever case with a positive result for IgM by ELISA. The case is a 28-year-old unvaccinated male tourist who arrived in Bolivia on 8 January 2017 and on 9 January went to the municipality of Caranavi, where he likely acquired the infection. On 28 January, the patient received medical attention in a local hospital and later transferred to a private clinic in Chile, from which he was discharged on 13 February.1 During the probable period of infection, the case did travel outside of Bolivia.

Yellow fever in Bolivia is endemic and occurred cyclically with outbreaks of varying magnitude up to 2012. Since 2013, only sporadic cases have been reported.

In Brazil, yellow fever is endemic and occurs with cyclic outbreaks of varying magnitude; however, as shown in Figure 1, the number of confirmed cases during the current outbreak exceeds the number of cases observed in the preceding decades.