. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. SPINOSE EAR TICK 365 agree in the essential detail that the bite results in an irritating lesion which is slow to heal and often leaves an ugly deep ; The tick is about two-fifths of an inch in length, irregularly oval, with thick turned-up margins, roughly shagreened, and of a yellowish earthy color spotted rusty red. It occurs in the Coast Range mountains of California and in Mexico and according to Herms is most commonly found in the dry leaves under live oak trees where cattle or other ani
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. SPINOSE EAR TICK 365 agree in the essential detail that the bite results in an irritating lesion which is slow to heal and often leaves an ugly deep ; The tick is about two-fifths of an inch in length, irregularly oval, with thick turned-up margins, roughly shagreened, and of a yellowish earthy color spotted rusty red. It occurs in the Coast Range mountains of California and in Mexico and according to Herms is most commonly found in the dry leaves under live oak trees where cattle or other animals are accustomed to lie in the shade. It passes through from four to seven moults to reach the adult state, occupying from one to two years to com- plete its life history, according to its success in finding suitable hosts. The bites of this tick produce sharp pain, accompanied by a considerable discoloration around the wound, and if on an arm or leg the whole limb may become greatly swollen as in the case of a snake bite. After scab- bing over, the wound may con- tinue to exude lymph and to be irritable for several weeks, and it is possible that infection and con- sequent blood-poisoning might readily occur, thus giving a basis for the tales mentioned above. Another noteworthy member of the Argasidse is the spinose ear tick, Otiobius (or Ornithodorus) megnini (Fig. 160), of south- western United States and Mexico, and now becoming common in parts of South Africa. It is very troublesome to man as well as to horses and other domestic animals. The nymphs, which develop from the larvse in the ears of their hosts, are peculiar in having very spiny bodies, quite different from the smooth larvse and adults. The nymphs remain attached to their hosts for months but finally drop off to transform into adults. The adults are not parasitic but lay their eggs without further feed- ing. The pain and annoyance caused by the spiny nymphs in the ears of domestic animals is sufficient to caus
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