Animal Allergy & Dermatology Center of Central TX

2207 Lake Austin Boulevard
Austin, TX 78703

(512)477-4824

www.aadcaustin.com

Ectoparasites

There are many different species of ectoparasites that can live in the hair follicles of your canine or feline companion. These conditions can have very similar symptoms, yet require very unique methods of treatment. Dr. Nichols will identify the particular species and develop a specific, effective treatment customized to your pet. Examples of common ectoparasites are as follows:

Sarcoptic Mange (Scabes) is caused by the mite Sarcoptes scabiei var. canis. Mites live in the superficial layers of the skin where they burrow, breed, and lay eggs. Scabes mites do not live for prolonged periods without the host, so they are generally passed by direct contact with other dogs. The hallmark of the disease is intense pruritus (itching). Classic scabies will manifest as red papules (bumps) to the chest, abdomen,and as time progresses, as a thick scale on the ears, elbows, and hocks.  Fever, lymph node enlargement, and weight loss with secondary bacterial infection may occur. To definitively diagnose this disease, the mites must be seen microscopically on skin scraping or fecal exam.

Demodectic Mange (Demodex) is a type of mite that is present in small numbers in most healthy dogs.  However, in some dogs, the mites live, reproduce, and overpopulate, leading to infection and hair loss. It is believed that some dogs have a defect in their immune system that allows the mites to reproduce. Diagnosis is made by microscope examination of scrapings of the skin and hair follicles and/or impression smear of the crusts.