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Significantly Reduced Genoprevalence of Vaccine-Type HPV-16/18 Infections among Vaccinated Compared to Non-Vaccinated Young Women 5.5 Years after a Bivalent HPV-16/18 Vaccine (Cervarix®) Pilot Project in Uganda
Örebro University, School of Health Sciences. Department of Pathology, School of Biomedical Sciences, Makerere University College of Health Sciences, Kampala, Uganda.ORCID iD: 0000-0002-7237-7734
Faculty of Medicine, Lund University, Lund, Sweden; Department of Public Health (Global Health/IHCAR), Karolinska Institute, Stockholm, Sweden.
Department of Pathology, School of Biomedical Sciences, Makerere University College of Health Sciences, Kampala, Uganda.
Örebro University, School of Medical Sciences. Department of Laboratory Medicine, Faculty of Medicine and Health, Örebro University Hospital, Örebro, Sweden.
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2016 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, no 8, e0160099Article in journal (Refereed) Published
Abstract [en]

The objective of this study was to determine the prevalence and some predictors for vaccine and non-vaccine types of HPV infections among bivalent HPV vaccinated and non-vaccinated young women in Uganda. This was a comparative cross sectional study 5.5 years after a bivalent HPV 16/18 vaccination (Cervarix®, GlaxoSmithKline, Belgium) pilot project in western Uganda. Cervical swabs were collected between July 2014-August 2014 and analyzed with a HPV genotyping test, CLART® HPV2 assay (Genomica, Madrid Spain) which is based on PCR followed by microarray for determination of genotype. Blood samples were also tested for HIV and syphilis infections as well as CD4 and CD8 lymphocyte levels. The age range of the participants was 15-24 years and mean age was 18.6(SD 1.4). Vaccine-type HPV-16/18 strains were significantly less prevalent among vaccinated women compared to non-vaccinated women (0.5% vs 5.6%, p 0.006, OR 95% CI 0.08(0.01-0.64). At type-specific level, significant difference was observed for HPV16 only. Other STIs (HIV/syphilis) were important risk factors for HPV infections including both vaccine types and non-vaccine types. In addition, for non-vaccine HPV types, living in an urban area, having a low BMI, low CD4 count and having had a high number of life time sexual partners were also significant risk factors. Our data concurs with the existing literature from other parts of the world regarding the effectiveness of bivalent HPV-16/18 vaccine in reducing the prevalence of HPV infections particularly vaccine HPV- 16/18 strains among vaccinated women. This study reinforces the recommendation to vaccinate young girls before sexual debut and integrate other STI particularly HIV and syphilis interventions into HPV vaccination packages.

Place, publisher, year, edition, pages
San Francisco, USA: Public Library of Science , 2016. Vol. 11, no 8, e0160099
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:oru:diva-51618DOI: 10.1371/journal.pone.0160099ISI: 000381110700023PubMedID: 27482705Scopus ID: 2-s2.0-84982091440OAI: oai:DiVA.org:oru-51618DiVA: diva2:951553
Funder
Sida - Swedish International Development Cooperation Agency, SWE-2010-146/348-2013-6172
Available from: 2016-08-09 Created: 2016-08-09 Last updated: 2017-10-17Bibliographically approved

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