Preliminary observations on myiasis in leprosy patients

Area of Science:

• Medical Entomology
• Dermatology
• Infectious Diseases

Background:

• Leprosy (Hansen's disease) is a chronic infectious disease primarily affecting the skin, peripheral nerves, and upper respiratory tract.
• Ulcerative lesions are common complications in leprosy patients, creating potential sites for secondary infections and infestations.
• Myiasis, the infestation of live human or animal tissue by dipterous larvae (maggots), can occur in neglected wounds.

Purpose of the Study:

• To investigate the incidence and characteristics of myiasis in leprosy patients with ulcerative lesions.
• To identify the types of flies responsible for myiasis in this patient population.
• To document the common sites of maggot infestation in leprosy-associated ulcers.

Main Methods:

• A prospective study was conducted on 3350 leprosy patients attending a surgical outpatient department.
• Patients presenting with typical symptoms of myiasis were identified and examined.
• Maggots were collected from affected sites (nose, hand ulcers, foot ulcers) and reared to identify the adult flies.

Main Results:

• Eighteen out of 3350 leprosy patients (0.54%) exhibited symptoms suggestive of myiasis.
• Maggots were found in the nose (5 cases), hand ulcers (3 cases), and foot ulcers (10 cases).
• Flies were successfully reared in 8 cases and identified as Sarcophaga ruficornis and Chrysomyia bezziana.

Conclusions:

• Myiasis is an uncommon but notable complication in leprosy patients with ulcerative lesions.
• Sarcophaga ruficornis and Chrysomyia bezziana are the likely causative agents of myiasis in this cohort.
• Regular monitoring and wound care are crucial to prevent myiasis in vulnerable leprosy patients.