Evaluación de la efectividad de una vacuna contra Mastitis por staphylococus aureus streptococus agalactiae en vacas lecheras

  • Hugo Tomas Mata UNLPam Facultad de Ciencias Veterinarias
  • Guillermo Héctor Pechín UNLPam. Facultad de Ciencias Veterinarias
  • Angel Tomás Larrea UNLPam. FAcultad de Ciencias Veterinarias
  • Roberto Nelson Otrosky UNLPam. Facultad de Ciencias Veterinarias
  • Guillermo Esteban Meglia UNLPam. Facultad de Ciencias Veterinarias

Keywords:

Mastitis, Dairy herd, Vaccine, Staphylococcus aureus

Abstract

Mastitis is a problematic infectious disease that affect the mammary gland of dairy cattle with negatives consequence upon milk quality and production. Genus of bacteria such as Staphylococcus and Streptococcus are responsible for more than 90% of mastitis cases. he objective of this work was to test the effect of a Staphylococcus aureus and Streptococcus agalactiae killed vaccine upon the disease incidence of the aforementioned bacteria and milk production during the first four months of lactation ina Holstein dairy herd. Sixty two heifers were randomly divided into two groups: T1(control) and T2 (treatment).All of the animals calved in autumn. During theexperimental period were discarded six animals, hence the groups were composed for 28 animals. The T2 animals received two subcutaneous doses, 40 and 7 days prepartum of a Staphylococcus aureus and Streptococcus agalactiae killed vaccine (Redumast, Biotay Lab.). The T1 and T2 groups were bacteriological sampled four times from each quarter with intervals of three weeks, and were also registered the milk yield during the first four month of lactation. The Staphylococcus aureus positive isolation was 5.14 % in T1 and 2.34 % in T2, whereas Streptococcus agalactiae showed a positive isolation of 6.54 % in T1 and 3.04 % in T2.The effect of vaccination was statistically significant(p0,05) in both groups. On the other hand, the Somatic Cell Count (SCC) was higher in the treatment group (257,622 cells/ml) than in the control group (157,256 cells/ml), whereas the milk yield was similar in both groups. The vaccine employed in this work was effective in reduce the incidence of Staphylococcus aureus and Streptococcus agalactiae subclinical infection in 45.5 % and 46.5 % respectively, without any effect upon milk production during the first four months of lactation (T1: 14.17 +- 5.14 and T2: 13.52 +- 4.22). Nevertheless, more research should be done in this field, in order to elucidate the contradictory response in SCC

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Author Biographies

Guillermo Héctor Pechín, UNLPam. Facultad de Ciencias Veterinarias

Docente investigador de las áreas de Nutrición Animal: Nutrición de mónogástricos (en especial cerdos), Nutrición de Rumiantes (con énfasis en Nutrición Mineral) y Producción Porcina

Angel Tomás Larrea, UNLPam. FAcultad de Ciencias Veterinarias

Desarrollo profesional en Producción Animal. Investigaciones en calidad de agua, calidad de leche, análisis económico de pérdida de bonificaciones y bienestar animal. Con formación de postgrado a través del Diplomado en Producción Lechera abarcando aspectos generales en calidad de leche, instalaciones, genética y reproducción, sanidad y gestión. Formación mediante Doctorado en caracterización y eficiencia de establecimientos lecheros. Especialista en docencia universitaria Docente Producción bovinos de leche

Published

2017-09-22

How to Cite

Mata, H. T., Pechín, G. H., Larrea, A. T., Otrosky, R. N., & Meglia, G. E. (2017). Evaluación de la efectividad de una vacuna contra Mastitis por staphylococus aureus streptococus agalactiae en vacas lecheras. Ciencia Veterinaria, 4(1), 7–16. Retrieved from https://cerac.unlpam.edu.ar/ojs/index.php/veterinaria/article/view/1962

Issue

Section

Artículos de Investigación