This report contains an erratum d.d. 08-07-2019 on page 42 and d.d. 10-09-2019 on page 43
Tables with yearly notifications of notifiable diseases and the Virological Weekly reports can be found in the Appendix.
In recent years, there has been an increase in the number of people who have fallen ill with the meningococcal type W bacteria. This increase continued in 2018, with 103 patients reported ill in 2018 compared to 80 in 2017. Since May 2018, vaccination against this type of meningococcus has therefore been added to the vaccinations for 14-month-old children. In 2019, this meningococcal ACWY vaccine will also be offered to teens born between 2001 and 2005. Some of the teens born in 2004 were already offered this vaccine in 2018.
The 2018-2019 flu season, with an estimated 400,000 persons falling ill, was substantially milder than the more serious epidemic of 2017-2018 with 900,000 persons falling ill. The number of cases of puerperal fever caused by group A Streptococcus (27 patients) reported in July and August of 2018 was strikingly high. During the same period, many people consulted their family doctor for impetigo complaints. A study carried out by RIVM concluded that the women who developed puerperal fever had relatively often had contact with persons suffering from scarlet fever, impetigo, or sore throat, all three of which can be caused by group A Streptococcus.
The infectious diseases that were responsible for the loss of the most 'healthy life years' in the Netherlands over the last five years were influenza, pneumococcal disease, legionnaire's disease, HIV infection and campylobacteriosis.
These are the findings published in the State of Infectious Diseases of RIVM. This annual report provides policy makers at the Ministry of Health, Welfare and Sport and the municipal health services, among others, with an overview of the most important developments in infectious diseases in the Netherlands and abroad.
The in-depth theme this year focuses on mosquitoes and the diseases that these insects can transmit. Reports in the media frequently confuse mosquito species and risks as well as the factors that influence them. This can cause unnecessary concern. An overview is therefore given of which mosquito species can transmit which diseases and under which circumstances. This knowledge is important to be able to determine whether there is a risk to public health in the Netherlands. It is not yet clear what the influence of climate change is (increased temperature, more rain, and ongoing drought) on the risks of mosquito-borne diseases.