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 (barely visible to the naked eye as tiny moving white specks)
Natural Habitat
High-humidity environments, organic matter, damp areas of homes (kitchens, bathrooms), stored food products, and areas with mold or fungal growth.
Diet & Feeding
Primarily feeds on mold, fungi, and products high in protein and fat such as grains, cheese, seeds, and dried meats.
Behavior Patterns
They thrive in humidity above 60-70%. They reproduce rapidly under favorable conditions; their lifecycle can be completed in under 3 weeks. They are often noticed when they appear in massive numbers as a fine white 'dust' that moves.
Risks & Benefits
They do not bite humans or pets but can cause 'grocer's itch' (allergic dermatitis) and respiratory irritation or asthma in sensitive individuals. They are considered pests as they contaminate food sources, though they play a minor role in breaking down organic matter in the ecosystem.
Identified on: 2/20/2026