Mold Mite (also known as Tyrophagus putrescentiae or similar grain/cheese mite)
Scientific Name: Tyrophagus putrescentiae
Order & Family: Order: Sarcoptiformes, Family: Acaridae
Size: Extremely small, microscopic to the naked eye (approximately 0.3 mm to 0.5 mm). They often appear as moving dust specks.
Natural Habitat
Warm, humid environments with poor ventilation. Commonly found in pantries, kitchens on spoiled food, animal feed, or on damp walls and furniture where mold grows.
Diet & Feeding
They feed primarily on fungal mold, but will also consume foods high in protein and fat such as cheese, nuts, seeds, grains, and dried pet food.
Behavior Patterns
They do not bite humans but reproduce rapidly in humid conditions. They are often seen swarming over items they invest, creating a 'dusty' appearance that seems to move.
Risks & Benefits
They do not transmit diseases to humans but are a potent allergen. Their presence can trigger respiratory issues or dermatitis (grocer's itch) in sensitive individuals. They also spoil food products.
Identified on: 2/26/2026