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 27 May - 2 June 2018 and includes updates on dengue, ebola virus disease, yellow fever, Cholera, monitoring environmental suitability of Vibrio growth in the Baltic Sea, Nipah virus disease, West Nile virus, Salmonella Agona, Rapid emergence of resistance to new antibiotic. β-lactamase inhibitor combination Ceftazidime-Avibactam.