Qassim, H. and Salih Al-Taweel, R. 2025. The relationship between the presence of Prevotella intermedia and Porphyromonas gingivalis and increased severity of gingivitis. Wasit Journal for Pure sciences. 4, 3 (Sep. 2025), 65–76. DOI:https://doi.org/10.31185/wjps.784.