Mold Mite (also known as Grain Mite or Tyrophagus mites)
Scientific Name: Tyrophagus putrescentiae
Order & Family: Order: Sarcoptiformes; Family: Acaridae
Size: Microscopic to 0.5 mm in length (barely visible to the naked eye as tiny white moving specks).
Natural Habitat
High-humidity environments with organic matter, such as kitchens, bathrooms, pantries, and damp storage areas where mold or fungi grow.
Diet & Feeding
Primarily feeds on mold, fungi, and high-protein/fatty decaying organic materials, including stored grains, pet food, and cheese.
Behavior Patterns
They reproduce rapidly in warm, moist conditions. They do not bite or sting but are often found 'swarming' over surfaces when their food source (mold) is abundant.
Risks & Benefits
They do not bite humans or pets and are not structurally damaging. However, they can cause mild skin irritation ('grocer's itch') or respiratory allergies in some individuals. They are primarily a nuisance indicator of high humidity and mold growth.
Identified on: 4/15/2026