[Toxocariasis in calves. Recent diagnosis and treatment (author's transl)].

Toxocara vitulorum, a parasite of suckling calves, was again diagnosed in Belgium in imported cattle of French origin. The infectious larvae are present in the milk and colostrum; they do not undergo further migration in the tissues of calves. This form of transmammary migration is not specific of T. vitulorum, but was also reported in S. ransomi in pigs. Treatment with levamisole at a dosage of 5 mg/kg results in complete disappearance of the worms. In addition to the cycles, the elements of a specific parasitological diagnosis are also described.