Echinococcus multilocularis, the fox tapeworm (Fuchsbandwurm), is a parasite genuinely more established in Germany than in most of the countries covered in this guide — it's precisely the reason the UK, Ireland, Finland, Malta and Norway require a tapeworm treatment before a dog can enter, to keep the parasite out of territory where it isn't established. Germany, by contrast, already has it: the Federal Institute for Risk Assessment (BfR) estimates 26-32% of foxes in Germany carry the parasite, according to reporting on BfR's own figures.

A dog can pick up the parasite's eggs on its snout or fur while sniffing fox droppings in a forest, or by eating an infected rodent, and can itself become a dead-end host that falls ill or, if it eats a mouse carrying the parasite, can begin shedding eggs the way a fox does. High-prevalence regions (Hochendemiegebiete) are concentrated in Bavaria and Baden-Württemberg — areas such as the Swabian Alb, the Allgäu and Upper Swabia specifically — with above-average rates also reported in parts of North Rhine-Westphalia.

The practical prevention is straightforward: regular deworming for a dog that spends time in forests or fields, washing a dog that's rolled in or sniffed fox droppings, and basic hand hygiene afterward. Human infection is rare — 41 cases were reported across Germany in 2022, and symptoms, when they appear at all, typically take 10 to 15 years to show because the parasite grows extremely slowly — but dog owners are overrepresented among human cases specifically because of daily close contact with a pet that's been in the forest, which is exactly why a dog's own deworming schedule matters here beyond just the dog's own health.