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Week 22, 27 May-2 June 2018

                                                                     All users

This weekly bulletin provides updates on threats monitored by ECDC.


Start of West Nile fever seasonal monitoring 2018
From this week (week 22, ending on 3 June 2018), ECDC will be reporting on the seasonal monitoring of human
and equine cases of West Nile fever occurring in the European Union/European Economic Area and neighbouring
countries. Every Friday, ECDC will provide the following information: (1) a summary of the epidemiological
situation, (2) a table detailing the number of human and equine cases by country and nomenclature of
territorial units for statistical (NUTS 3) and administrative levels (click on the table at the bottom of the ECDC
Surveillance Atlas), and (3) maps with human West Nile fever cases; equine West Nile fever cases; and human
and equine West Nile fever cases combined.

Deferral or testing of prospective donors applies to blood donors leaving areas with one or more autochthonous
human West Nile virus cases. The information provided aims to support EU/EEA Member States in implementing
preventive measures.

The weekly updates will be provided through the CDTR and maps are available through ECDC¶s Surveillance
Atlas of Infectious Diseases.

Start of monitoring of Vibrio growth in the Baltic Sea
ECDC epidemic intelligence team will monitor Vibrio growth in the Baltic Sea during the summer, starting this
week (week 22, ending on 3 June 2018). Weekly updates will be sent to the national focal points and published
in the CDTR when the risk of Vibrio growth is determined as medium or above.

The Vibrio viewer can also be used for monitoring and is available on the E3 Geoportal. This is a near real-time
model that uses daily updated remote sensing data to examine worldwide environmental conditions, such as
sea surface temperature and salinity for Vibrio spp.. Please note that the model used for the Vibrio viewer has
been calibrated to the Baltic Region in Northern Europe and might not apply to other worldwide settings prior to

Infections caused by Vibrio species other than V. cholerae can be serious, particularly for immunocompromised
persons. However, the overall occurrence is low despite an increase having recently been observed in northern

I. Executive summary

European Centre for Disease Prevention and Control (ECDC)                                                                             1/18
Postal address: ECDC 169 73 Solna, Sweden
Visiting address: Gustav III:s Boulevard 40, Solna, Sweden               Epidemic Intelligence duty email:                                          Link to ECDC CDTR web page ±including related PowerPoint© slides
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