The Nairobi fly, often referred to as the ‘Kenya fly’ or ‘Acid fly,’ is an insect native to East Africa, particularly prevalent in Kenya.
Belonging to the Paederus genus, these small beetles are known for their striking orange and black colouration.
Despite their innocuous appearance, they can cause significant skin irritation and lesions through accidental contact.
The primary issue with Nairobi flies arises when they are crushed against the skin. Unlike many other insects, Nairobi flies do not bite or sting.
Instead, their bodily fluids contain a potent chemical called pederin, which is responsible for the skin reactions.
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The most common condition resulting from contact with Nairobi fly is a form of dermatitis known as dermatitis linearis.
It manifests as a linear streak of redness and blistering on the skin, often accompanied by a burning sensation and itching.
In some cases, exposure to pederin can lead to more severe reactions, including large blisters, secondary infections, and extensive skin damage.
The affected area can take weeks to heal, leaving behind dark pigmentation that may last even longer.
If pederin gets into the eyes, it can cause severe conjunctivitis, characterized by redness, swelling, and a significant amount of pain.
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Nairobi flies thrive in warm, humid environments. They are commonly found in agricultural regions, attracted by light and moisture. The proliferation of these flies is often linked to:
Preventing encounters with Nairobi flies involves several practical measures:
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If contact with a Nairobi fly occurs, it is crucial to follow these steps to minimise the effects:
