Preliminary characterization of lactic acid bacteria isolated from Zlatar cheese.
OBJECTIVE
Isolation, characterization and identification of lactic acid bacteria (LAB) from artisanal Zlatar cheese during the ripening process and selection of strains with good technological characteristics.


RESULTS
Characterization of LAB was performed based on morphological, physiological and biochemical assays, as well as, by determining proteolytic activity and plasmid profile. rep-polymerase chain reaction (PCR) analysis and 16S rDNA sequencing were used for the identification of LAB. PCR analysis was performed with specific primers for detection of the gene encoding nisin production. Strains Lactobacillus paracasei subsp. paracasei, Lactobacillus plantarum, Lactobacillus brevis, Lactococcus lactis subsp. lactis, Enterococcus faecium and Enterococcus faecalis were the main groups present in the Zlatar cheese during ripening.


CONCLUSIONS
Temporal changes in the species were observed during the Zlatar cheese ripening. Mesophilic lactobacilli are predominant microflora in Zlatar cheese.


CONCLUSIONS
In this study we determined that Zlatar cheese up to 30 days old could be used as a source of strains for the preparation of potential starter cultures in the process of industrial cheese production. As the Serbian food market is adjusting to European Union regulations, the standardization of Zlatar cheese production by using starter culture(s) based on autochtonous well-characterized LAB will enable the industrial production of this popular cheese in the future.
Institute of Molecular Genetics and Genetic Engineering, Vojvode Stepe 444a, Belgrade, Serbia.
K
K
Veljovic
A
A
Terzic-Vidojevic
M
M
Vukasinovic
I
I
Strahinic
J
J
Begovic
J
J
Lozo
M
M
Ostojic
L
L
Topisirovic
D015373:Bacterial Typing Techniques; D002611:Cheese; D019649:Food Industry; D005516:Food Microbiology; D007777:Lactobacillaceae / Q000235:genetics / Q000302:isolation & purification*; D012336:RNA, Ribosomal, 16S / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015022:Yugoslavia
D012336:RNA, Ribosomal, 16S