Faaz Nassir AL-Saad, Nktel. 2018. “Study of Some Virulence Factor and Detection of Sortase Enzymes A and Cov R/S of Streptococcus Agalactiae by PCR”. Al-Qadisiyah Journal of Pure Science 23 (2), 90 - 97. https://doi.org/10.29350/jops.2018.23.2.740.