Endoparasites are important causes of diseases in sheep and goats. The economic
losses are due to the low productivity, usually observed in the dry period, and the high
mortality, which occurs mainly at the end of the rainy season or the beginning of the
drought. Resistance to antiparasitics appears because of mutations that arise
spontaneously in any group of growing cells, exposed to drugs or not, most of the
time, in a harmful way. The objective of the work was to compare the parasitic load of
the animals and the hematocrit values in small ruminants raised in the semi-intensive
system in Amazonas through hematocrit values and checking eggs per gram of feces
(OPG). In five moments, feces were collected directly from the rectal ampoule of 19
animals (9 sheep and 10 goats) for OPG counting and blood sample collection by
venipuncture of the jugular. It was possible to observe the inversely proportional
relationship between hematocrit values and parasitic load of small ruminants,
presenting a higher average parasitic load (OPG = 4,390) and lower mean hematocrit
value (22.16% in goats and 27.25 in sheep) in the transition between rainy to dry
period.
Keywords: Gastroenteritis. Ruminants. Amazonas.
|
