occurrence of ticks (acari: ixodidae) on human hosts, in three municipalities in the state of pará, brazil.assuming the existence of tick parasitism in humans in the state of pará, an aggregate observational study was developed along a transversal line in three cities of the state, during two years. interviews and examinations of 2,160 townspeople and tourists were carried out, without discrimination of ethnic, sex, age, or social status, and classified for effects analyzed for four bands of age, six types of activities in the society, and two sexes. larvae, nymphs, and adults of ticks had been ident ...201020943016
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