1 Center of Epidemiology and Screening, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet2 Department of Public Health, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet3 Section IV. Building 22.4/24.4, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, Københavns Universitet4 unknown5 Center of Epidemiology and Screening, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet6 Section IV. Building 22.4/24.4, Department of Cellular and Molecular Medicine, Faculty of Health and Medical Sciences, Københavns Universitet
BACKGROUND: Human papillomavirus (HPV) genotyping assays are becoming increasingly attractive for use in mass screening, as they offer a possibility to integrate HPV screening with HPV vaccine monitoring, thereby generating a synergy between the two main modes of cervical cancer prevention. The Genomica CLART HPV2 assay is a semi-automated PCR-based microarray assay detecting 35 high-risk and low-risk HPV genotypes. However, few reports have described this assay in cervical screening. An aim of the present study, Horizon, was to assess the prevalence of high-risk HPV infections in Copenhagen, Denmark, an area with a high background risk of cervical cancer where women aged 23-65 years are targeted for organized screening. METHODS: Material from 5,068 SurePath samples of women participating in routine screening and clinical follow-up of cervical abnormalities was tested using liquid based cytology, CLART HPV2 and Hybrid Capture 2 (HC2). RESULTS: At least one of the 35 defined genotypes was detected by CLART in 1,896 (37%) samples. The most frequent high-risk genotypes were HPV 16 (7%), HPV 52 (5%), and HPV 31 (4%). The most frequent low-risk genotypes were HPV 53 (5%), HPV 61 (4%), and HPV 66 (3%). Among 4,793 women targeted by the screening program (23-65 years), 1,166 (24%) tested positive for one or more of the 13 high-risk genotypes. This proportion decreased from 40% at age 23-29 years to 10% at age 60-65 years. On HC2, 1,035 (20%) samples were positive for any high-risk and thus CLART showed a higher analytical sensitivity for 13 high-risk HPV genotypes than HC2, and this was found in all age-groups and in women normal cytology. CONCLUSIONS: CLART performed well with a positive reproducibility for high-risk genotypes of 86%, and a negative reproducibility of 97%. This report furthermore updates the genotype distribution in Denmark prior to the inclusion of the HPV-vaccinated cohorts into the screening program, and as such represents a valuable baseline for future vaccine impact assessment.
B M C Infectious Diseases, 2014, Vol 14, Issue 413, p. 1-11
Adult; Aged; Alphapapillomavirus; Denmark; Female; Genotype; Humans; Mass Screening; Middle Aged; Oligonucleotide Array Sequence Analysis; Papillomavirus Infections; Polymerase Chain Reaction; Population Surveillance; Prevalence; Reproducibility of Results; Uterine Cervical Neoplasms; Young Adult