Prevalence of high-risk human papilioma virus in women with high-grade squamous cell intraepithelial lesions in Botswana using abbott real time HPV assay

Abstract

Background: High-risk human papillomavirus (HR-HPV) has been demonstrated to be the necessary cause of cervical carcinoma. High-risk HPV detection has a prognostic significance for the women who are at increased risk of disease progression. HPV genotyping in cervical cancer precursor lesions is crucial for prevention and management of cervical cancer. This study was designed to investigate the distribution of HR-HPV genotypes among a group of patients with high-grade squamous intraepithelial lesions and higher, of the cervix, in Botswana. Materials and methods: 185-archived residual formalin-fixed paraffin-embedded cervical biopsies collected between the years, 2006 and 2008 were studied. These tissues were diagnosed with HSIL (n = 146) and squamous cell carcinoma (n = 39). DNA was extracted using the Abbott m2000 analy-ser (Abbott Laboratories, Illinois) using reagents provided by the manufacturer. HPV geno-typing was done using the Abbott Real Time HR-HPV PCR, which qualitatively detects 14 HR-HPV (HR-HPV (reported as HPV 16, 18 and other HPV). Results: DNA was successfully extracted from 162/185 (87.6%) tissues as indicated by a positive β -globin test. 132/162 (82%) tested positive for HR-HPV The HPV 16 prevalence was 50% (66/132), HPV 18 at 15.2% (20/132) and other Group 1 HR-HPV plus HPV 66 and 68 had a prevalence of 56.1% (74/132). Other HR-HPV types were common in HSIL than in carci-noma, while HPV 16 was more prevalent in carcinomas than other HR-HPV genotypes . Conclusion: In this study, HPV 16 and other HR-HPV genotypes were commonly associated with HSIL but HPV 18 was uncommon among Botswana women. Our data highlights the need for mul-tivalent HPV vaccines with cross coverage for other high risk HPV other than HPV 16 and 18.