Abstract
Background: The experimental use of maggots (sterile larvae of Lucilia sericata) can prevent the amputation of an extremity in case of severe infection after trauma injury. Maggots destroy bacteria by secreting enzymes such as tryptase, peptidase and lipase. An alkaline environment is created by the secretion of allantoin, ammonia and calcium carbonate, which reduces bacterial growth and stimulates new formation of granulation tissue.
Material and Methods: In the period 4.1999–12.2003 42 patients (mean age 54 yrs (25–83), were included in cur prospective study for maggot treatment of severe infections after trauma (Osteomyelitis n=26, lower leg 13x, femur 6x, pelvis 4x, upper extremity 3x), necrotizing fasciitis n=7, soft tissue infection n=3, gangrene n-3, ulcus cruris n=3). Maggots were applied to the wound in a polyvinyl alcohol bag (Biobag) and were replaced every 3–4 days.
Results: The mean duration of treatment was 32,1 days (n~37) for the patients who had received one continuous treatment and 62,2 days if more treatments were applied (n=5). The average number of biobag changes per patient was 11.5 (range 4–30); the average number of maggots applied per patient was 863 (range 80–6840). In only 1 patient with osteomyelitis a lower leg amputation was necessary (1/26=3.8%) although in almost patients there was severe (multiple) co morbidity.
Conclusion: In our study the experimental use of maggots could reduce the amputation rate of limbs in case of severe infections after trauma. Our laboratory research investigations with analysis of the secreting enzymes of maggots will be presented to support that this «ancient» method has a place in modern traumatology to diminish invalidating amputations.
The abstracts were prepared by editorial secretary, Mrs K. Papastefanou. Correspondence should be addressed to Professor K.N. Malizos, Department of Orthopaedic Surgery, School of Medicine, University of Thessalia, Larissa, 41222 GREECE
