Echinococcus multilocularis, the small fox tapeworm, is a genuinely distinctive and well-documented Austrian health topic, and AGES (the Austrian Agency for Health and Food Safety) has the actual numbers from its national parasite reference laboratory in Innsbruck: the parasite was found in 45% of foxes tested in Vorarlberg, 33% in Tirol, 19% in Kärnten and 16% in Salzburg. Infected foxes usually show no visible signs of illness, even carrying several thousand worms.

Dogs are only rarely a host for the parasite's adult stage, and AGES notes dogs can occasionally develop the more serious form (alveolar echinococcosis) as accidental intermediate hosts, which is rare. The bigger practical concern is what a dog carrying the adult worm can pass on to its owner: humans are also accidental intermediate hosts, infected by swallowing microscopic eggs, for example from soil, unwashed foraged food, or contact with a dog that has eaten an infected rodent. Human symptoms, when they appear, typically take 5 to 15 years to show up and can resemble a liver tumour.

AGES recommends regular, professional deworming for dogs, particularly ones that hunt or scavenge rodents in rural or alpine areas where the prevalence is highest. Beyond that, the same hygiene habits matter: wash hands after contact with soil, grass or the dog itself, and wash or cook any foraged food such as wild mushrooms or berries picked near the ground, since the parasite's eggs can stay infectious for months and are notably resistant to ordinary disinfectants.