What is a skin mite called? - briefly
The primary skin mite affecting humans is Sarcoptes scabiei, the organism responsible for scabies. A second common species, Demodex folliculorum, inhabits hair follicles and sebaceous glands.
What is a skin mite called? - in detail
The organism that inhabits the epidermis and causes dermatological conditions is commonly referred to as a skin mite. The most frequently encountered species is Sarcoptes scabiei, the causative agent of scabies. Another group, Demodex species, resides in hair follicles and sebaceous glands, with Demodex folliculorum and Demodex brevis being the principal members.
Key characteristics:
- Taxonomic classification: Arachnida → Acari → Sarcoptiformes (for Sarcoptes) and Trombidiformes (for Demodex).
- Size: Sarcoptes scabiei ≈ 0.3–0.4 mm; Demodex ≈ 0.1–0.4 mm.
- Habitat: Sarcoptes burrows within the stratum corneum; Demodex occupies follicular canals and sebaceous ducts.
- Transmission: Sarcoptes spreads by direct skin‑to‑skin contact; Demodex is typically transferred through close contact or contaminated objects, though colonization often occurs without overt infection.
- Clinical relevance: Sarcoptes infestation produces intense pruritus and a characteristic rash; Demodex overgrowth may contribute to rosacea, blepharitis, and other inflammatory dermatoses.
Diagnostic methods include skin scrapings examined under light microscopy for Sarcoptes, and epilated hair follicles or skin surface biopsies for Demodex. Treatment protocols differ: scabicidal agents such as permethrin or ivermectin target Sarcoptes, while topical acaricides (e.g., metronidazole) or oral tetracyclines address Demodex‑related conditions.
Understanding the precise terminology and biological distinctions of these mites informs accurate diagnosis, effective therapy, and epidemiological monitoring.