Uso da cultura microbiológica na fazenda como método de diagnóstico para terapia seletiva de vaca seca: um estudo de caso

Abstract

Over the years, subclinical mastitis has caused significant damage to the milk production chain, where several diagnostic methods are used in order to identify the affected animals. The present work aims to present a study of case developed during the Supervised Curricular Internship, which lasted about four months, carried out at the company named as "Evoluir Saúde do Leite", located in Patos de Minas, Minas Gerais, Brazil. Agricultural planning activities were monitored; consulting on milk quality and udder health; employee training; laboratory routine; evaluation of milking and milking machines, through system vacuum levels, drop test, pulsators, pump capacity, effective reserve, manual reserve, vacuum oscillations and extractor regulation; analysis of data on the mastitis health situation of the herd, milking routine, maintenance of milking machines, environmental hygiene, drying protocols, animal treatments and people management. The elaborated article is entitled: Use of microbiological culture on the farm as a diagnostic method for selective dry cow therapy: a study of case. The adopted methodology was a case study with exploratory descriptive characteristic. The proposed objective was to describe a protocol using microbiological culture (MC) as a diagnostic method for subclinical mastitis in dry cow selective therapy, in order to observe the dynamics of postpartum infections, the use of antibiotics (ATB) and costs technique in an assisted rural property. 192 dry cows were evaluated, represented by 768 teats. It was observed that 51% of the teats had subclinical mastitis, therefore, they were dried with sealant (SEL) + antibiotic (ATB), 47% of the teats were dried with SEL alone and 2% of the teats were lost or isolated. Of 192 parturients, 13% had clinical mastitis with less than 90 days of lactation, of which 5.7% were dried using only SEL and 8.9% were dried using ATB + SEL. With regard to the cost of implementation, the CM method presented respective values of savings with the use of ATB of R$8,020.00 and monthly gain for the farm of R$489.44. Basing on that, the veterinarian of the activity plays an essential role in the implementation of this approach, being responsible for developing the criteria for choosing the animals to be treated and maintaining a constant monitoring of the health parameters of the mammary gland and the quality of the milk on the farm.