Eze, E. I.; Onumah, V. N. Evaluation of Antibacterial Activity and Interaction of Methanolic Extract of Physcia Grisea and Cephalosporin on Clinical Isolates of Streptococcus Pyogenes. JBRB 2025, 8 (2), 700 – 702. https://doi.org/10.4314/br.v8i2.66894.