The L3 were recovered and quantified in three strata (heights) of
grass (0–10 cm, 10–20 cm and >20 cm) as well as in the remaining feces and a superficial
layer of soil, collected from beneath the feces. In order to obtain results under different
environmental conditions, fecal samples containing H. contortus L3 were deposited on pasture
in January (summer), in April (autumn), and July (winter). In all of the periods, the
L3 were able to migrate from the feces to the herbage. However, rains, accompanied by
high relative humidity and high temperatures, apparently favored migration. The highest
L3 recovery rate in the pasture was in the summer observation period,