Skin Problems Caused by Parasites (Fleas, Ticks, Mange Mites and More)
A parasite is an organism (a flea, for example) that spends a significant portion of its life in or on the living tissue of a host organism (your pet) and which causes harm to the host without immediately killing it. Some parasites are relatively innocuous, some are not, and some can cause serious skin problems.
Then there are Demodectic (or Demodex) mites, which cause another kind of mange. These mites are found in small numbers in the hair follicles of normal pets. In stressful situations, however, they proliferate, and large numbers inhabit the skin and hair follicles.
The good news is that Demodex mites can easily be seen on a skin scraping viewed under the microscope. The less good news is that generalized demodicosis is serious and often difficult to treat. Large areas of the body may be affected, and often the affected areas are also infected by bacteria. In these cases, the skin is red, crusty and warm, and has many pustules. It may bleed easily and has a strong, rancid odor.