Demodicosis
Aussi appelé: Canine Demodicosis, Demodectic Mange
En bref
Demodicosis, also known as demodectic mange, is a common canine skin disease caused by an overpopulation of microscopic Demodex mites. Learn how to recognize the signs—such as hair loss and skin redness—how veterinarians diagnose it using deep skin scrapes, and the treatment steps needed to clear the infection.
TL;DR. Proliferation des acariens Demodex dans les follicules: alopecie et irritation; diagnostic et traitement long (jusqu a 6 mois).
Demodex est un resident normal du follicule; la maladie survient en cas de surpopulation.
Qu'est-ce que c'est ?
Overgrowth of normal Demodex mites in hair follicles (demodectic mange). Not highly contagious adult-to-adult. Classify localized vs generalized; juvenile-onset vs adult-onset (often secondary to immune suppression).
Causes et facteurs de risque
Immune control fails: stress, endoparasites, poor nutrition, immunosuppressive drugs, underlying disease (e.g. Cushing, hypothyroidism, cancer). Higher risk: Rat Terrier, English Bulldog, Chinese Shar-Pei.
Signes à surveiller
- Alopecia (cardinal)
- Scaling, erythema (common)
- Secondary pyoderma; pododemodicosis (occasional)
- Fever, anorexia if deep infection (rare; emergency)
Alopecie en plaques autour des yeux et du museau: signe classique.
Comment les vétérinaires diagnostiquent
Deep skin scrape (gold standard: pinch then scrape to capillary bleed). Hair plucks near eyes/paws. Biopsy if scrapes negative (esp. thick-skinned breeds like Shar-Pei).
Le grattage cutane profond est la reference.
Options de traitement
Localized juvenile: often self-limiting; treat predisposing factors. Generalized: long course (up to 6 months). Amitraz dips or Ivermectin (caution MDR1 herding breeds). Continue past clinical cure until 2 consecutive negative scrapes weeks apart.
Pronostic
Localized juvenile: excellent. Generalized juvenile: good with consistent therapy. Adult-onset: depends on underlying disease.
Prévention
Support immunity, parasite control, minimize stress, cautious immunosuppressants. Do not breed dogs with generalized demodicosis.
Quand appeler le vétérinaire
Any patchy alopecia or red/scaly skin. Emergency: fever, anorexia, severe depression, deep oozing foot lesions.
Sources
- Small Animal Dermatology: A Color Atlas and Therapeutic Guide, Page 32, 132, 135.
My highlights & notes
Signes et symptômes
Races à risque plus élevé
Comment c’est diagnostiqué
- Deep skin scrapeRéférence
- Hair-plucks
- Skin biopsy
Approches de traitement
Le traitement doit être prescrit par un vétérinaire agréé selon votre animal. Les doses précises ne sont volontairement pas affichées.
Questions fréquentes
What is Demodicosis?
Demodicosis, also known as demodectic mange, is a common canine skin disease caused by an overpopulation of microscopic Demodex mites. Learn how to recognize the signs—such as hair loss and skin redness—how veterinarians diagnose it using deep skin scrapes, and the treatment steps needed to clear the infection.
What are the symptoms of Demodicosis?
Hair loss、Skin redness、Scaling、Comedones、Greasy seborrhea、Darkening of the skin、Lichenification、Papules
How is Demodicosis diagnosed?
Deep skin scrape、Hair-plucks、Skin biopsy
How is Demodicosis treated?
Le traitement doit être prescrit par un vétérinaire agréé selon votre animal. Les doses précises ne sont volontairement pas affichées.
Sources
- 皮膚病 教科書點子書 Small-Animal-Dermatology-A-Color-Atlas-and-Therapeutic-Guide · p. 135
- 皮膚病 教科書點子書 Small-Animal-Dermatology-A-Color-Atlas-and-Therapeutic-Guide · p. 135
- 皮膚病 教科書點子書 Small-Animal-Dermatology-A-Color-Atlas-and-Therapeutic-Guide · p. 132
- 皮膚病 教科書點子書 Small-Animal-Dermatology-A-Color-Atlas-and-Therapeutic-Guide · p. 32
Cet article est informatif et ne remplace pas un avis vétérinaire. Si votre animal est malade, consultez un vétérinaire.
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