The pinewood nematode (Bursaphelenchus xylophilus) is a microscopic worm that develops in conifers, particularly those of the genus Pinus, which can lead to the decline of the affected trees. In several regions of the world (Asia, Europe), this particularly destructive parasite has had serious consequences for forests and related industries. The pinewood nematode is therefore closely monitored, especially in the European Union, where it is classified as a priority quarantine organism. In France, an annual monitoring programme for the pinewood nematode has been in place for around 20 years. An outbreak was detected for the first time in November 2025 in the Landes département. ANSES has conducted several expert appraisals to assess the risks of introduction and establishment of the organism in France and to recommend management measures for pine wood and bark.

Lumpy skin disease (LSD) is an emerging viral disease that only affects cattle and is mainly transmitted by biting insects. It was previously confined to sub-Saharan Africa but has recently appeared in Europe. This disease poses no risk to human health but can have major consequences for livestock farms. Symptoms, modes of transmission, control methods... ANSES provides an update on this closely monitored disease.

Native to the tropical forests of Southeast Asia, the tiger mosquito (Aedes albopictus) has adapted to many different environments, particularly urban ones, colonising a vast array of containers in which it lays its eggs in small volumes of water. The tiger mosquito is an opportunistic anthropophilic species which bites humans and can transmit viruses such as dengue, chikungunya and Zika. Because of this, it represents a major public health challenge. Below you will find an introduction to a mosquito that we haven’t heard the last from.