Epidemiology and Natural History of Human Papillomavirus Infections and Type-Specific Implications in Cervical Neoplasia
Cancer Epidemiology Research Program (CERP), Institut Català d'Oncologia - Catalan Institute of Oncology (ICO), L'Hospitalet de Llobregat (Barcelona), Spain. Vaccine
(Impact Factor: 3.62).
09/2008; 26 Suppl 10(Suppl 10):K1-16. DOI: 10.1016/j.vaccine.2008.05.064
Worldwide human papillomavirus (HPV) prevalence in women with normal cytology at any given point in time is approximately 10% indicating that HPV is one of the most common sexually transmitted infections. HPV-16 is consistently the most common type and HPV-18 the second with some minor regional differences. Furthermore, across the spectrum of cervical lesions, HPV-16 is consistently the most common HPV type contributing to 50-55% of invasive cervical cancer cases strongly suggesting that this viral type has a biological advantage for transmission, persistency and transformation. The same phenomenon is observed albeit at a lower level for HPV-18 and HPV-45. Sexual behavioral patterns across age groups and populations are central to the description of the HPV circulation and of the risk of infection. The concept of group sexual behavior (in addition to individual sexual behavior) is important in exploring HPV transmission and has implications for defining and monitoring HPV and cancer prevention strategies. In natural history studies, the pattern of HPV DNA prevalence by age groups is similar to the patterns of HPV incidence. Rates of exposure in young women are high and often include multiple types. There is a spontaneous and rapid decrease of the HPV DNA detection rates in the middle-age groups followed by a second rise in the post-menopausal years. This article reviews: 1) the evidence in relation to the burden of HPV infections in the world and the contributions of each HPV type to the spectrum of cervical cellular changes spanning from normal cytology to invasive cervical cancer; 2) the critical role of the patterns of sexual behavior in the populations; and 3) selected aspects of the technical and methodological complexity of natural history studies of HPV and cervical neoplasia.
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- "It is universally acknowledged that almost all cervical cancers and immediate precancerous lesions are caused by persistent infection with at least one of 15 high-risk HPV genotypes (HrHPV). HPV16 and HPV18 are the most carcinogenic of these types and are responsible for approximately 70% of all cervical cancers throughout the world4567. To increase the coverage for population-based screening programs world-wide, self-collected cervico-vaginal specimens provide a potential solution. "
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Determine the ability of the Cobas 4800 assay to detect high-risk human papillomavirus (HrHPV) and high-grade cervical lesions when using cervico-vaginal samples applied to liquid medium and solid media cards compared to a direct cervical sample.
Two cervico-vaginal specimens (pseudo self-collected) were obtained from 319 women. One was applied to an iFTA Card (FTA) then the brush placed in liquid-based medium (LSELF); the other was applied to a new solid media: POI card (POI). The clinical performance of Cobas4800 assay using the three aforementioned specimens was compared to direct collected endocervical specimens in liquid media (LDOC).
The overall agreements of HrHPV detection were 84.2% (LSELF vs. LDOC), 81.0% (FTA vs. LDOC), and 82.3% (POI vs. LDOC). LSELF, FTA and POI identified 98.0%, 79.6%, and 97.5% positive cases of LDOC. Sensitivity to identify CIN2+ were 98.4% (LSELF), 73.8% (FTA), 95.1% (POI), and 93.4% (LDOC) respectively. FTA had 78.1% and 90.4% agreement with the LSELF samples for all HrHPV and HPV16/18 detection respectively, while POI had 91.6% for both.
Cobas4800 HPV test combined with cervico-vaginal specimens applied to both liquid media and POI solid card are accurate to detect HrHPV infection and high-grade cervical lesions as compared with direct endocervical samples in liquid media.
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- "Human papillomavirus (HPV) is the main cause of cervical cancer . The high-risk subtypes HPV 16 and 18 are responsible for 70% of cervical cancer cases . "
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Human papillomavirus (HPV) is the main cause of cervical cancer. In France, since March 2007, HPV vaccination has been recommended for girls aged 14, in addition to a catch-up program for girls aged 15 to 23. In October 2012, the target population was changed to 11- to 14-year-old girls. The main objective of the present study was to evaluate the impact of the recommendation change on HPV vaccination coverage and compliance.
We conducted a descriptive study of the Échantillon Généraliste des Bénéficiaires (EGB), which is a random 1/97 permanent sample from the French National Health Insurance Database. We focused our analyses on girls aged 11 to 17 years who were covered by the main insurance scheme (which covers 77% of the French population).
We included 16,195 girls in this analysis. At the last update of the database (06/15/2014), 42% of 17-year-old girls had been vaccinated, with more than 50% of them having been vaccinated at age 14. Between January 2012 and June 2014, patients were reimbursed for a total of 7698 doses of the HPV vaccine. During the first trimester of 2013, the number of vaccinated 11- to 13-year-old girls increased, growing by more than 20-fold between the last trimester of 2012 (n=8) and the last trimester of 2013 (n=178). Less than 60% of the vaccinated patients received 3 injections.
Implementation of the new recommendations was rapid but had only a slight impact on vaccination coverage.
Available from: Zulqarnain Baloch
- "Moreover, HPV-33 and 31 have high prevalences in some regions (Jin et al., 2010). In the current study, HPV-16, 52, 58 and 33 were the most common types among Tibetan and Naxi women; these findings are in line with previous research (Mayineur et al., 2011, Bosch et al., 2008, Li et al., 2008). Among Han women, HPV-33 (5.1%) is the most common genotype, followed by HPV-58, 16, and 52. "
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ABSTRACT: The prevalence and genotype distribution of human papillomavirus (HPV) vary throughout the world. To assess the prevalence and genotype distribution of HPV among three ethnic groups in two geographic locations in northwestern Yunnan, we recruited 522 women in Shangri-le (n=255) and Lijiang (n=267). PCR amplification of HPV DNA was performed on cervical cells from these women using two consensus primer systems (MY09/11 and GP5/6). Amplified HPV DNA was genotyped using the HPV GenoArray test. Geographically, the HPV prevalence was significantly higher (P=0.002) among Shangri-le women than among Lijiang women. Infections with high-risk (HR)-HPV and with multiple HPV genotypes were also significantly more common (P=0.001) among women in Shangri-le than women in Lijiang. Additionally, the prevalence of overall, HR-HPV, and single genotype HPV infections was significantly higher (P=0.001) among Tibetan women than among Naxi and Han women. HPV-16 and HPV-33 were significantly more frequent in Shangri-le women compared with Lijiang (P=0.006) women. In addition, HPV-16 (9.81%) and HPV-33 (5.88%) were significantly more prevalent in Tibetan women than in Naxi and Han women. Here, for the first time, we highlight the significant variation in the prevalence and genotype distribution of HPV in various populations in the north-western region of Yunnan Province. This article is protected by copyright. All rights reserved.
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