الفهرس 
Identification and characterization of bacteriocin producing bacteria capable of inhibiting of bovine mastitis pathogens
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Abstract
Mastitis most prevalent disease specially sub clinical mastitis which have economic loss ,decrease milk production and increase antibiotic resistant, so we use probioic in treatment of mastitis instead of antibiotic to treatment of mastitis pathogen .Isolation of Lactobacillus spp. from milk L.pentosus, L.plantarum isolated from ewe milk ,L.acidophillus and L.salivarious from cow, L.fermentum, L.helveticus from buffaloes and L.bulgaricus ,L.brevis from goat then measurement of molecular weight of bacteriocin by SDS-PAGE isolated from bovine and ovine milk. Bacteriocin are highly specific antibacterial proteins which are produced by strains of Lactobacillus spp. and showed broad range of antibacterial activity against some mastitis pathogens (S. aureus, E. coli, Y. enterocolitica, S. uberis and S. xylosus). High thermal stability (up to 100{u00B0}C) and was active over wide range of pH - 3 to 10 by agar diffusion method