[A worm infection in the skin of a dog. First autochthonous Dirofilaria repens infection ofa dog in the Netherlands].

The history of an 18-month-old English bulldog with a painful lump in the skin on its thigh is described. After opening the nodule a few Dirofilaria repens nematodes were found. Oval-shaped transparent eggs with moving larvae were seen microscopically. The dog was treated with milbemycin and made a complete recovery. The dog had never been abroad, but 6 months earlier in early May had been on a campsite in the middle of the Netherlands where many mosquitoes were present. This is the first described case of an autochthonous D. repens infection of a dog in the Netherlands.