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Journal of Clinical Microbiology, September 2000, p. 3388-3393, Vol. 38, No. 9
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Detection of Human Papillomavirus Type 16 DNA in Consecutive Genital Samples Does Not Always Represent Persistent Infection as Determined by Molecular Variant Analysis

Marie-Hélène Mayrand,1,2 François Coutlée,1,2,3,* Catherine Hankins,3,4,dagger Normand Lapointe,1,5,dagger Pierre Forest,2 Manon de Ladurantaye,2 The Canadian Women's HIV Study Group,Dagger and Michel Roger1,2

Départements de Microbiologie et de Pédiatrie, Université de Montréal,1 Département de Microbiologie et Infectiologie, Hôpital Notre-Dame, Centre Hospitalier de l'Université de Montréal,2 Department of Epidemiology and Biostatistics and Department of Oncology, McGill University,3 Unité de Maladies Infectieuses, Direction de la Santé Publique de Montréal-Centre,4 and Centre Maternel et Infantile sur le SIDA, Centre de Recherche de l'Hôpital Sainte-Justine, Hôpital Sainte-Justine,5 Montreal, Quebec, Canada

Received 10 November 1999/Returned for modification 1 June 2000/Accepted 12 July 2000

Persistent human papillomavirus (HPV) infection of the uterine cervix is a risk factor for progression to high-grade squamous intraepithelial lesions. Detection in consecutive genital samples of HPV-16 DNA, a frequently encountered HPV type, may represent persistent infection or reinfection. We undertook a study using PCR-single-strand conformation polymorphism (SSCP) analysis and sequencing of PCR products (PCR-sequencing) to determine if consecutive HPV-16-positive samples contained the same HPV-16 variant. Fifty women (36 human immunodeficiency virus [HIV] seropositive, 14 HIV seronegative) had at least two consecutive genital specimens obtained at 6-month intervals that contained HPV-16 DNA as determined by a consensus L1 PCR assay. A total of 144 samples were amplified with two primer pairs for SSCP analysis of the entire long control region. Fifteen different SSCP patterns were identified in our population, while 22 variants were identified by PCR-sequencing. The most frequent SSCP pattern was found in 75 (53%) samples from 27 (54%) women. The SSCP patterns obtained from consecutive specimens were identical for 46 (92%) of 50 women, suggesting persistent infection. Four women exhibited in consecutive specimens different HPV-16 SSCP patterns that were all confirmed by PCR-sequencing. The additional information on the nature of persistent infection provided by molecular variant analysis was useful for 6% of women, since three of the four women who did not have identical consecutive specimens would have been misclassified as having persistent HPV-16 infection on the basis of HPV typing.

* Corresponding author. Mailing address: Département de Microbiologie et Infectiologie, Hôpital Notre-Dame du Centre Hospitalier de l'Université de Montréal, 1560 Sherbrooke est, Montreal, Quebec H2L 4M1, Canada. Phone: (514) 281-6000, ext. 5103. Fax: (514) 896-4607. E-mail: francois.coutlee{at}ssss.gouv.qc.ca.

dagger Member of The Canadian Women's HIV Study Group.

Dagger Other members of The Canadian Women's HIV Study Group are listed in the appendix.

Journal of Clinical Microbiology, September 2000, p. 3388-3393, Vol. 38, No. 9
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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