Overview

• Spring 2025 has seen unusually low mosquito numbers in Germany due to widespread drought drying out breeding sites.
• Experts caution that summer rains could trigger mass hatching of floodwater mosquito eggs, which remain viable for years during dry conditions.
• The invasive Asian tiger mosquito, a vector for tropical diseases, continues to expand northward, with established populations in Berlin and southern Germany.
• The Asian tiger mosquito is capable of transmitting diseases like West Nile virus, dengue, and Zika, raising public health concerns.
• Berlin health officials are urging residents to submit suspected tiger mosquito samples for laboratory analysis to aid monitoring efforts.