Mold Mite (also known as Grain Mite or Cheese Mite)
Tyrophagus putrescentiae (and related species like Acarus siro)
- Order & Family
- Order: Sarcoptiformes, Family: Acaridae
- Size
- 0.3 mm to 0.5 mm (Barely visible to the naked eye, appearing as moving dust specks)
Natural Habitat
Environments with high humidity (usually above 60%) and warmth; often found on damp walls, in pantries contaminating stored foods (flour, grain, cheese), or on moldy surfaces.
Diet & Feeding
Primarily feeds on fungi (mold spores) growing on damp surfaces or food, as well as foodstuffs like grain, flour, yeast, and cheese.
Behavior Patterns
They do not fly but crawl slowly. They reproduce rapidly in humid conditions, often appearing in large clusters that look like a layer of brownish or white living dust covering surfaces.
Risks & Benefits
Risks: They contaminate food products making them unpalatable; their molted skins and feces can cause allergic reactions known as 'grocer's itch' or aggravate asthma in sensitive individuals. Benefits: None in domestic settings; they are decomposers in nature.