Dermatophagoides farinae

Definition

A species of house dust mite in the family Pyroglyphidae, commonly known as the American house dust mite. These microscopic arachnids inhabit indoor environments worldwide, feeding on shed human skin flakes and other organic debris. Along with D. pteronyssinus, it is among the most clinically significant indoor allergens, with fecal particles and mite bodies triggering allergic rhinitis, asthma, and atopic dermatitis in sensitized individuals.

Etymology

Genus name from Greek derma (skin) + phagein (to eat), referring to diet of shed skin; species epithet farinae from Latin for 'of flour,' alluding to its flour-like appearance in dust samples.

Example

In allergy clinics, D. farinae is routinely tested alongside D. pteronyssinus on skin-prick panels because patients often show species-specific IgE sensitization patterns that guide targeted allergen avoidance strategies.

Synonyms

• American house dust mite

Related Terms

• Dermatophagoides pteronyssinus
• House dust mite
• Pyroglyphidae
• Sarcoptiformes
• acarology
• allergen
• guanine

Usage Notes

Distinguish from D. pteronyssinus (European house dust mite) by geographic prevalence and subtle morphological differences; both species often co-occur in temperate climates. The term 'farinae' is sometimes misspelled or confused with storage mite species in family Acaridae (e.g., Tyrophagus putrescentiae) that also inhabit food products.