Diagnóstico de mastitis subclínica mediante tres métodos para el control y tratamiento en vacas Holstein.

Abstract

The objective of this research work was to diagnose subclinical mastitis in Holstein cows from the Tunshi Experimental Station – Animal Science Faculty using three methods for the control and treatment. The evaluation was carried out using the Milk Checker, Draminski and California Mastitis Test (CMT) and the best method was determined. The bacteriological culture of the samples reactive to mastitis was carried out with an antibiogram in order to apply the best antibiotic treatment. For the development of the experimental work, 16 cows in production were used which were diagnosed using the three aforementioned methods. Each quarter was coded according to the position in which it occurred and data were collected twice a day. Samples from the quarters that tested positive were taken to later be send to the laboratory. For the statistical analysis, descriptive statistics with frequencies using three methods was used since it was not an experimental design. Results showed an incidence of subclinical mastitis according to CMT of 87.5%. The most effective method was CMT with 92.19% correct data. 100% of Gram + Bacteria were obtained; most of them Staphylococcus aureus which accounted for 51.4% and 48.6% correspond to Bacilli being these β hemolytic and non-hemolytic respectively. The antibiogram reported sensitivity to Tetracycline, Penicillin and resistance to Ciprofloxacin. It is recommended to carry out a water control using an antibiogram to verify the presence of antibiotics resulting from residues from other farms and also to carry out an antibiogram at least once a year to avoid cows to create antibiotic resistance.