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In the current study, twenty-eight bacterial strains were isolated from homemade yogurt samples from Ağrı Province, Turkey. The bacterial strains were identifi ed by conventional and molecular techniques. Among the twenty-eight isolates, seventeen isolates were identifi ed according to the 16 S rDNA region and determined to belong to fi ve different genus including Sphingomonas (8 isolates), Burkholderia (5 isolates), Lactobacillus (2 isolates), Lactococcus (1 isolate), Staphylococcus (1 isolate). In this study, the presence of Burkholderia in home-made yogurt samples were reported for the fi rst time, whereas Sphingomonas was detected for the second time. We also investigated the carbonate (CaCO 3 and MgCO 3 ) and silicate ( CaSiO 3 and MgSiO 3 ) dissolving potential of seventeen bacterial isolates. Among these seventeen bacterial isolates, fi fteen bacterial isolates have CaCO 3 -dissolving and 10 bacterial isolates have MgCO 3 -dissolving potential.The silicates dissolution ability was relatively less than that of carbonates dissolving.We observed that six bacterial isolates have CaSiO 3 and only two bacterial isolates have MgSiO 3 dissolution abilities. In conclusion, this work clearly shows the diversity of bacteria existing in fermented cow milk samples in Ağrı Province, Turkey, which could be considered as valuable sources for lactic acid bacteria (LAB) isolation and further probiotic potential.

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