3.3. Leptospiroses seroprevalence study
Of 320 eligible subjects, 290 (91%) individuals were enrolled
into the study from 68 residences located within 15 villages
of the rural region of S˜ao Miguel. Thirty subjects declined
participation in the study. Males constituted 51.7% (n = 150)
and females were 48.3% (n = 140). The average age was
28.3 years (± 19.3, SD), ranging from 5 to 84 years. The per
capita household monthly income was less than US$300.00
per month for 96.6% (n = 280) of the population. Among subjects,
82.7% were engaged directly in subsistence farming,
such as agriculture and animal husbandry.