Blister Beetle Dermatitis Outbreaks in Mali.

Area of Science:

• Dermatology
• Entomology
• Public Health

Background:

• Meloidae beetles, found in various climates, possess cantharidin, a toxin causing poisoning and dermatitis.
• Meloidae dermatitis outbreaks present a recurring public health concern, particularly in specific geographical and seasonal contexts.

Purpose of the Study:

• To analyze recurrent Meloidae-related dermatitis outbreaks and their impact on medical consultations.
• To identify the causative agent and contributing factors for these outbreaks.

Main Methods:

• Analysis of medical consultation records from a French military base between 2015 and 2019.
• Correlation of outbreak data with meteorological information.
• Identification of the Meloidae species involved.

Main Results:

• Multiple dermatitis outbreaks were recorded annually from July to August, peaking in 2015 and 2018 with 100 cases each.
• In 2017, the incidence rate reached 4.4%, with initial medical consultations comprising 31.5% of total medical activity.
• The identified beetle species was Cyaneolytta fryi.

Conclusions:

• Clinically benign, Meloidae dermatitis outbreaks impose a significant burden on healthcare resources.
• Diagnosis is clinical and anamnestic, requiring a history of insect contact.
• Prevention involves avoiding bright lights; awareness is crucial for military personnel, workers, and travelers in affected regions like the Sahel.