Lactococcus lactis ssp. lactis as Potential Functional Starter Culture

Svrha je ovoga istraživanja bila identificirati i okarakterizirati potencijalne autohtone funkcionalne starter kulture izolirane iz domaće kobasice proizvedene od konjskog mesa. Dominantnu su mikrofloru u uzorcima kobasica činile bakterije mliječne kiseline (BMK), a zatim mikrokoki. Od bakterija mliječne kiseline prevladavale su vrste Lactococcus lactis ssp. lactis i Lactobacillus plantarum. Vrsta Lactococcus lactis ssp. lactis nije uobičajena u fermentiranim kobasicama, pa smo ju okarakterizirali kao potencijalnu funkcionalnu starter kulturu. Vrsta Lactococcus lactis ssp. lactis proizvela je značajnu količinu mliječne kiseline, a uspješno je rasla pri 12, 18 i 22 ºC, te u prisutnosti 5 % NaCl. Također je dobro podnijela liofilizaciju i simulirane uvjete želučanog soka i soka tankog crijeva. Osim toga, uspješno je suzbila rast patogena i pokazala je dobra adhezijska svojstva in vitro.
The aim of this study is to identify and characterise potential autochthonous functional starter cultures in homemade horsemeat sausage. The dominant microflora in the samples of horsemeat sausage were lactic acid bacteria (LAB), followed by micrococci. Among the LAB, Lactococcus lactis ssp. lactis and Lactobacillus plantarum were the dominant species, and since the first is not common in fermented sausages, we characterised it as a potential functional starter culture. Lactococcus lactis ssp. lactis produced a significant amount of lactic acid, displayed good growth capability at 12, 18 and 22 °C, growth in the presence of 5 % NaCl, good viability after lyophilisation and in simulated gastric and small intestinal juice, antimicrobial activity against test pathogens, and good adhesive properties in vitro.