EFSA and ECDC have just published the European Union summary report on trends and sources of zoonoses, zoonotic agents and food-borne outbreaks in 2017: http://www.efsa.europa.eu/en/press/news/181212

It includes a chapter on Listeria (Chapter 3, p. 67-85) for whose drafting we have collaborated with EFSA.

Cases of listeriosis decreased slightly in 2017: 2,480 infections were reported, against 2,509 in 2016. However, the trend has been upward over the past five years. The group most affected by the disease in 2017 were the elderly, particularly those over 84. In this age group, listeriosis fatality rate was 24%. The highest levels of L. monocytogenes were detected in fish and fishery products (6%), followed by ready-to-eat salads (4.2%).