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Large-bodied Demodex mite infestation in 4 dogs
Andrew Hillier1, Clifford E Desch
1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus 43210, USA.
Journal of the American Veterinary Medical Association
|November 7, 2002
Summary
Large-bodied Demodex mites, distinct from Demodex canis, were identified in four dogs with generalized demodicosis. Treatment involving miticides and managing underlying conditions proved effective for these mite infestations.
Area of Science:
- Veterinary Dermatology
- Parasitology
Background:
- Demodex mites are common canine ectoparasites.
- Demodicosis can manifest in various forms, including generalized demodicosis.
- Distinguishing between Demodex species is crucial for accurate diagnosis and treatment.
Observation:
- Four dogs presented with generalized demodicosis.
- Large-bodied Demodex mites, larger than Demodex canis, were detected via deep skin scrapings, predominantly on the trunk.
- Histological examination revealed mites within hair follicles and sebaceous glands.
Findings:
- The identified mites were morphologically distinct from Demodex canis, with males ~100% and females ~50% larger.
- All affected dogs had adult-onset generalized demodicosis.
- Coexisting conditions included iatrogenic hypercortisolism (2 dogs) and hypothyroidism (1 dog).
Implications:
- This finding suggests the existence of a distinct, large-bodied Demodex species in dogs.
- Accurate identification of Demodex species is vital for effective treatment protocols.
- Management strategies should consider potential coexisting diseases contributing to demodicosis severity.