Influência da indução artificial da lactação na saúde das vacas mestiças

Abstract

Hormonal protocols lactation artificial induction are an alternative to reduce economic losses due to low reproductive rates. There are no studies with clinical evaluation of the animals submitted to the protocols. The objective of this study was to evaluate the effect of lactation artificial induction on the health of the animals, through the physical and complementary exams (hemogram and serum biochemistry). 12 cows were submitted to a 21-day treatment protocol with estradiol benzoate, progesterone, cloprostenol, dexamethasone and recombinant bovine somatotropin. Physical examination and blood sampling were performed weekly. The animals responded to the protocol and were clinically healthy. In D21, all animals showed stress leukogram due to dexamethasone. The AST serum enzyme values were elevated at moments D7 and D14 due to the excessive application of intramuscular medication, AF and GGT presented increasing values, not characterizing liver disease. The animals maintained body condition score, normal cholesterol levels, higher triglycerides, and a tendency to reduce beta hydroxybutyrate (BHBA). The protocol was efficient when it was implanted in crossbred dairy cows and the drugs used did not interfere in the animals health, allowing the pregnancy and the gestation of them.