The Biobrio 12(1 & 2), 2025

Antimicrobial activity of Lactobacillus isolated from raw milk of Cow

Preeti Kumari

ABSTRACT:

Altogether, 7 strains of Lactobacillus were isolated from raw milk of cow. Antimicrobial activity? of isolated isolates was tested against three pathogenic bacteria: E. coli, Proteus vulgaris,? Staphylococcus aureus. Out of 7 isolates, 3 belong to L. acidophilus, 2 to L. delbrueckii and 2 to? L. casei. All isolates showed antimicrobial activity against all selected pathogens. Maximum? inhibition zone was measured for isolate no. PLA3 (L. acidophilus) against Proteus vulgaris (7.2? mm). Maximum inhibition against E. coli was recorded for isolate no. PLA3 (6.8 mm) followed? by PLC1 (L. casei) (6.7 mm). Maximum inhibition against Staphylococcus aureus was recorded? for PLA3 (6.5 mm) followed by PLD1 (L. delbreuckii) (6.3 mm

Keywords:    

Lactobacillus, antimicrobial activity, pathogenic bacteria, isolates

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