Dear Angela, you can use primers to amplify conserved region of bacterial 16S rRNA. Then you can carry out DNA sequencing of amplicons to identify bacterial species.

Best regards.

 Hi Khilood and Mert

Thanks a lot, I appreaciate your help

Best regards

Try: 

DNA extraction 

16S rARN gene V3 region amplification 

Secuencing and compare using  the QIIME pipeline. 

That is a good method and relatively easy. You can do your own primers on Primer3 sofware or take it any of bibliography. 

Thank you Erick

Dear Angela,

Please see attached some my articles on the subject...

Good luck

Dear Eitan

Thank you for your help, I will read your articles.

Best Regards

Angela