They are not transmittable to humans, but infestations are very contagious with pets in contact with other animals. We have used TEA TREE OIL diluted. Then I take a small eyedropper and squirt it in one ear at a time, instantly covering the opening with the ear flap. I spend a full minute massaging the ear to keep the animal from shaking it all out before it gets into the ear canal and begins doing its work. Massage as long as you can and rub the animal's head to make it a plesant experience so you can repeat this twice a day for a week.
Consistency equals results.
Pimples - Apply full strength with a cotton swab two to four times each day for four days. Scalp Problems - Itchy, dry, scaly or oily scalps can be helped with Tea Tree Oil. The vapors may be inhaled by adding five drops of the oil to a bowl of steaming hot water or to a vaporizor. Skin Problems - Use one teaspoon in a tub of bath water for a very invigorating bath. It is reported to help sooth and disinfect the skin in cases of psoriasis, eczema and so forth.