This section is from the book "Sporting Dogs. Their Points And Management In Health, And Disease", by Frank Townend Barton. Also available from Amazon: Sporting Dogs; Their Points and Management in Health and Disease.
This is a very intractable variety of mange, resulting from the invasion of the hair-follicles by a minute mite, known as Demodex folliculorum, easily recognisable on microscopic examination. It is of lobster-like shape.
It will readily be understood that the inaccessible habitats of these mites renders the effective application of medicinal agents at a disadvantage.
Destruction of the roots of the hairs is a common result, and a permanent bare patch often remains as a legacy of the parasitic attack.
Like the sarcoptic, follicular mange is transferable from one dog to another, though less readily than the former.
Bare patches should be shaved all around, and the part painted with colourless tincture of iodine daily, or twice daily.
The most satisfactory way of dealing with this complaint is to consult a qualified veterinary surgeon.