[Seal finger in Denmark diagnosed by PCR-technique]. Seal finger is an unusual infection in Denmark but is seen quite often in Greenland. A 69 year-old Danish man developed severe infection after cutting his finger on a sea urchin while handling a fishing net. Treatment with beta-lactam antibiotics had no effect. Standard culture from the lesion was negative. A Mycoplasma species was detected by PCR and DNA sequencing and subsequently cultured on special media. Specifically asked about exposure to sea mammals the patient could inform that a dead seal had also been trapped in the fishing net.