This report contains an erratum d.d. 18-12-2018 on page 96 and 97.
Zoonotic diseases are infections transmissible between animals and humans. This report is an annual description of zoonotic diseases relevant to the Netherlands. Included are reporting trends of notifiable zoonotic diseases, noteworthy research and case studies. This report also focuses on a specific theme related to zoonotic diseases. This year, the theme is One Health collaboration.
Similar to previous years, no noteworthy changes were observed in 2017 with regard to most notifiable zoonotic diseases. Foodborne bacteria (Campylobacter, Listeria monocytogenes, Salmonella and STEC) again make up the largest proportion of zoonotic infections this year. The number of cases of leptospirosis is still high, although last year's decline continues. The number of patients with an orthohantavirus-infection has increased further. In 2016, Brucella canis was observed for the first time in dogs in the Netherlands and again in 2017 several imported dogs tested positive for this bacterium.
Besides Chlamydia psittaci, several other zoonotic Chlamydia species exist. From 2013, six Dutch patients were diagnosed with C. caviae pneumonia and in 2017, one with C. felis conjunctivitis. Results from a research project about antibiotic resistance (ESBLAT), show that ESBL-genes are most exchanged between people, instead of between animals and humans. Bacteria containing ESBL-genes are able to produce enzymes that prevent antibiotics from working; the bacteria become resistant. The resistance spreads because the genes can be passed on to other bacteria.
The Theme of this year is 'Integrated approach of zoonoses; challenges and applications of One Health collaboration'. To signal, assess and control zoonotic infections, there is a strong need for collaboration between different disciplines, based on the principle of One Health. The central idea of One Health is that humans, animals and the environment are interconnected and influence each other. Described is how the One Health principle has evolved. In addition, two recent outbreaks of zoonoses, Seoul in rats and Brucella canis in dogs, show how One Health cooperation in the Netherlands is organised.