Evaluation of the antimicrobial efficacy of the Minthostachys verticillata essential oil and one of its main compounds, limonene, against Streptococcus uberis strains isolated from bovine mastitis

MONTIRONI I; CARIDDI LN; REINOSO E

REVISTA ARGENTINA DE MICROBIOLOGíA

ASOCIACION ARGENTINA MICROBIOLOGIA

Lugar: Buenos Aires; Año: 2016

0325-7541

Bovine mastitis is a disease that causes great economic losses per year, beingStreptococcus uberis the main environmental pathogen involved. The aim of the present study was to determine the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of Minthostachys verticillata essential oil and limonene for S. uberis strains isolated from bovine mastitis. In addition, the effect of MIC on biofilm formation was analyzed. MIC values for the essential oil ranged from 14.3 to 114.5 mg/ml (1.56-12.5% v/v) and MBCbetween 114.5 and 229 mg/ml (12.5-25% v/v). MICs for limonene ranged from 3.3 to 52.5 mg/ml(0.39-6.25% v/v) and MBC was 210 mg/ml (25% v/v). Both compounds showed antibacterial activity and affected the biofilm formation of most of the strains tested. In conclusion, these compounds could be used as an alternative and/or complementary therapy for bovine mastitis caused by S. uberis.