Dengue Virus Detected in Tiger Mosquitoes in Switzerland

Our Medical Director Prof. Dr. Jan Fehr assesses the situation

A recent report by Swiss Radio and Television (SRF) addressed the detection of dengue virus in tiger mosquitoes near Basel. In his statement, our Medical Director and Head Physician, Prof. Dr. Jan Fehr, explains what this means for Switzerland:

“The detection of this virus in a tiger mosquito in Switzerland is not surprising. In fact, it was expected given the changing climate conditions that are increasingly affecting our region. Over the past few years, the tiger mosquito has established itself in Basel and other parts of Switzerland where the climate is suitable for its survival. What is significant is that this finding confirms that the dengue virus can indeed be detected in Switzerland.

As climate warming continues, it is likely that dengue viruses will become more common in the future, potentially leading to transmission to humans. When this might happen and how frequently remains uncertain. However, we must be prepared for scenarios in which people in Switzerland—without any travel to tropical regions—could contract dengue.

This is not, in itself, a cause for alarm. Even if someone becomes infected with the dengue virus, it does not necessarily mean they will develop severe illness. In most cases, infections are mild. Nevertheless, it is important that both the public and healthcare professionals begin to consider that tropical diseases may increasingly occur here. Preventive measures will become more relevant, and dengue should be considered more frequently as a possible cause in cases of fever.”