How does a mite bite manifest in a dog? - briefly
Mite bites appear as pruritic, erythematous spots, frequently located on the ears, muzzle, and paws, often accompanied by hair loss or crusted lesions. Affected dogs typically exhibit excessive scratching, rubbing against objects, and may develop secondary skin infections.
How does a mite bite manifest in a dog? - in detail
Mite bites on a dog produce distinct dermatological changes that appear within days of infestation. The skin typically shows intense pruritus, prompting constant scratching, licking, or chewing of affected areas. Erythema develops around the bite site, often accompanied by a raised papule or pustule that may become crusted. Alopecia follows the inflammation, especially in regions where the animal repeatedly removes hair. Scales and flaking skin can overlay the lesions, and secondary bacterial infection may create purulent exudate.
Common anatomical sites depend on the mite species. Sarcoptic mange frequently involves the ears, elbows, hocks, and ventral abdomen, while demodicosis tends to affect the face, forelimbs, and trunk. Otodectes cuniculi, though primarily an ear mite, can cause bite reactions on the external ear canal and surrounding pinna. In all cases, the lesions are often symmetrical and may merge into larger plaques if left untreated.
Key clinical indicators include:
- Persistent scratching or biting of the skin
- Red, inflamed papules with central crust
- Localized hair loss and thinning
- Fine to coarse scaling over the affected area
- Warm, moist discharge if secondary infection occurs
- Possible fever or lethargy in severe infestations
Laboratory confirmation involves skin scrapings examined under a microscope to identify mites, eggs, or fecal pellets. Adhesive tape preparations can reveal otodectic mites on the ear surface. Blood work may show eosinophilia, supporting an allergic response to the bite.
Prompt recognition of these signs enables early therapeutic intervention, reducing tissue damage and preventing spread to other animals.