EN 
IN
Journal article
Probiotic Potency and Molecular Identification of Lactic Acid Bacteria Isolated from Bali Cattle s Colon , Indonesia
I Wayan Suardana Annisa Putri Cahyani KOMANG JANUARTHA PUTRA PINATIH
Volume : 5 Nomor : 5 Published : 2016, May
Global Advanced Research Journal of Medicine and Medical Sciences
Abstrak
Lactic acid bacteria (LAB) is a group of bacteria which able to produce lactic acid as a main product. LAB normally live in the digestive tract of humans and animals, and generally use as probiotics. On the other hand, Bali cattle are known has highly adaption to poor quality of feed so that it is suggested that specific types of LAB can be found. The aims of this study was to determine the probiotics producing by LAB isolates 18A isolated from colon of Bali cattle as well as to identify of isolate by analysis of the 16S rRNA gene sequence. Probiotic potency analysis was performed by cultivation of LAB isolates 18A on the Man Rogosa Sharpe Broth (MRSB) medium, continued by Gram staining and catalase test. Antimicrobial activities of isolate were done against pathogenic bacteria (E. coli KL 48 (2) and S. aureus). Furthermore, genetic analysis was initiated by DNA isolation, amplification of the 16S rRNA gene, and sequencing. The result showed that LAB isolate 18A has inhibitory efficacy against gastrointestinal pathogens such as Escherichia coli KL 48 (2) and Staphylococcus aureus by 18,8% and 28,06% respectively. Moreover, genetic analysis showed the LAB isolate 18A as Enterococcus durans with the similarity level of 99%, and a value of 100 bootstrapping. Keywords: Lactic acid bacteria, 16S rRNA gene, antimicrobial activity, Bali cattle’colon