Communicable disease threats report, 17 - 23 July 2016, week 29

Surveillance report
Publication series: Communicable Disease Threats Report (CDTR)
Time period covered: 17 - 23 July 2016

​The ECDC Communicable Disease Threats Report (CDTR) is a weekly bulletin for epidemiologists and health professionals on active public health threats. This issue covers the period 17 - 23 July 2016 and includes updates on poliomyelitis, Zika virus, yellow fever, West Nile fever, influenzas A(H5N1) and A(H7N9) and Vibrio growth in the Baltic Sea.

Executive summary

This issue covers the period 17 to 23 July 2016 and highlights updates on Zika virus infection, Yellow fever and West Nile virus, amongst others.
On 15 July, the island of Saba in the Caribbean reported its first local mosquito-borne Zika virus transmission. On the same day, the first suspected female-to-male sexual transmission of Zika virus was reported by the US CDC. Furthermore, there are investigations on going about a person in Utah, who doesn’t have travel history to affected areas and had not had sex with someone infected with Zika, as well as on suspected local mosquito-borne cases in Florida. On 12 July, ECDC published the seventh update of its risk assessment and a Zika virus infection atlas, which will be updated every Friday.

An outbreak of yellow fever in Angola started in December 2015 in the municipality of Viana, Luanda province, and has spread to all 18 provinces of Angola. On 23 April 2016, the neighbouring Democratic Republic of Congo (DRC) officially declared a yellow fever outbreak linked to the one in Angola. As of the past week, the number of suspected and confirmed cases continues to decline in Angola. In DRC, according to the health cluster bulletin, the lack of laboratory capacity continues to jeopardise the identification of confirmed cases. On 15 July, ECDC published a rapid risk assessment on this topic, which concluded that the risk to the EU remains limited.

As of 14 July 2016, no human cases of West Nile fever have been reported in the EU Member States. Seven cases were reported in neighbouring countries since the beginning of the 2016 transmission season. ECDC updates its West Nile fever maps weekly.