Distribution of EBV and HR-HPV in patients with either cervical precancerous or cancerous lesions compared to normal subjects. High risk human papillomavirus were detected by PCR (using consensus primers) and by Hybrid Capture 2 (Digene). Epstein-Barr virus was detected by PCR using primers that amplify the entire BALF-1 gene. Percentage in ordinate; Normal cervix, cervical lesions and carcinoma cases in Abscissa. NC: normal cervixes; CIN-2/3: High-grade cervical lesions; CIN-1: Low-grade cervical lesions; SCC: squamous cell carcinoma.