Kamitetep (Phereoeca uterella): The Household Moth Larvae That Can Cause Skin Irritation

The Kamitetep, scientifically known as Phereoeca uterella, is a small but pesky insect commonly found clinging to walls, ceilings, and furniture inside homes—especially in warm, humid environments. Though it may appear harmless, this moth larva can cause bruises, skin irritation, and persistent itching if it comes into contact with your skin.

What is Phereoeca uterella (Plaster Bagworm)?

Often mistaken for just a speck of dirt or dust, this moth belongs to the Tineidae family, and is commonly referred to as:

Plaster Bagworm

Household Casebearer

These insects are prevalent in warm climates, particularly in the southern United States and tropical countries. Their name comes from their cocoon, which resembles a tiny grayish case or shell made from silk, dust, fibers, and sand.

Appearance and Behavior

Larval Stage: The Kamitetep appears as a small caterpillar-like insect encased in a flattened cocoon or “bag” about 13 mm (half an inch) in length.

The larva can move while partially inside this shell, protruding only its head and front legs when looking for food.

They are often seen clinging to walls, ceilings, and behind furniture.

Health Hazards: Why You Should Be Cautious
While not venomous or life-threatening, contact with the larva or its cocoon can trigger skin reactions in sensitive individuals:

Bruises or red bumps

Severe itching and irritation

Swelling or discomfort that may last for days or even weeks

This is believed to be caused by the hair-like structures on their bodies that embed into the skin, causing allergic reactions similar to stinging nettles.

Treatment for Skin Irritation

If you experience a reaction:

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