Afifi , S. . ., A. El-Sharif, Z. Helal, and E. . . El-Musallamy. “Activity of Kefir Grains Against Gardnerella Vaginalis”. Bacterial Empire, vol. 3, no. 4, Nov. 2020, pp. 69-73, doi:10.36547/be.2020.3.4.69-73.