Background: Myasis are due to the invasion of tissue or cavities of animal organism by dipterous larvae.
Patients and methods: Two cases of semi-specific myasis caused by Sarcophaga larvae are described.
Results: Case 1: A 77-year-old woman with Kaposi sarcoma in the left leg developed cutaneous radionecrosis secondary to radiotherapy. In June, 1998 five fly larvae were observed moving freeing within the wound. These were removed with forceps and local dressing of the wound was performed with povidone-iodine. Case 2: A 87-year-old man with moderate dementia, progressive immobilization syndrome prostasic neoplasm and gastric ulcer reported. In the posterior part of the right outer ear the presence of three fly larvae were observed with some dermic orifices made. The larvae were removed with forceps and local dressing was carried out with povidone-iodine. In the laboratory an adult form was obtained from one of the larva.
Conclusions: Myasis in infrequent in Spain and appears particularly in people with some predisposing factor. Treatment consists in the elimination of the larvae in the infected tissue and disinfection of the wound.