. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. The Americac dog tick (fig. 8) usually occurs as an adult tick on dogs, the earlier stages (those of seed tick and nymph) occurring on various small mammals. It attaches to various parts of the body, but displays a preference for the ears. When fully en- gorged with blood the female tick is almost half an inch long and of a bluish color, with a reddish-brown shield with white markings on the back near the head. This species occurs in the eastern half of the United States, in FiGUEE 8.—The Amsrlcan dog tick or
. The dog as a carrier of parasites and diseases. Dogs as carriers of disease; Dogs. The Americac dog tick (fig. 8) usually occurs as an adult tick on dogs, the earlier stages (those of seed tick and nymph) occurring on various small mammals. It attaches to various parts of the body, but displays a preference for the ears. When fully en- gorged with blood the female tick is almost half an inch long and of a bluish color, with a reddish-brown shield with white markings on the back near the head. This species occurs in the eastern half of the United States, in FiGUEE 8.—The Amsrlcan dog tick or wood tick, parts of the WCSt COast, and Bermacentor variabilis. Left, engorged female; right, ^ • ii„ i i • ,i • male. Dorsal views. Enlarged. From Banks, 1908. Occasionally elseWUere m tlUS country. The brown dog tick (fig. 9) occurs on dogs as seed tick^ nymph, and adult. It frequently attaches inside a dog's ears, sometimes deep in the ear canal. The young ticks are Ukely to be abundant m the long hair on the neck, but any stage may occur on almost any part ot the body, including the spaces be- tween the toes. In this country this tick occurs in the South, being reported from Texas, Louisiana, Mississippi, and Florida, but it may be found farther north, being reported from Ohio, Pennsylvania, and New York. Its occurrence in these Northern States is due, no doubt, to the fact that dog owners have transported ticky dogs, mostly hunting dogs, from the South to the Northern States. It appears to have taken up the habit of living indoors over winter as an adaptation to cold winters, and accordiog to F. C. Bishopp, of the Bureau of Entomology, and reports from various persons, causes seri- ous trouble by establishing itself in kennels and about houses. Symptoms. — Ticks cause local irritation at points of attachment, and dogs commonly bite or scratch these places. In heavy infesta- tions the injury may be serious. In addition to the local injury there is a loss of nerv
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