Prevalence Of Human Papillomavirus Infection Research Articles

HPV test kao primarni test skrininga u prevenciji cervikalnog karcinoma u Republici Hrvatskoj

The knowledge that persistent infection with the human papillomavirus (HPV) is a necessary cause of cervical cancer has led to changes in strategies for the prevention and early detection of this cancer, with aim to eradicate it. Primary prevention through the use of vaccines that prevent HPV infection has been implemented since 2006, while secondary prevention of cervical cancer has been significantly improved by the introduction of the HPV test, either as the only method of primary screening or in combination with the Pap test. Screening based on the Pap smear has been unquestionably successful in reducing incidence and mortality in the last century. More recently, there have been gradual changes in the use of the HPV test, from its use as a reflex test after the detection of mild cytological abnormalities, through co-testing, to the use of the HPV test as the only test in primary screening thanks to the evidence gathered from the use of large, randomized research and meta-analysis. The advantages of using the HPV test over the Pap test include a higher sensitivity in detecting premalignant lesions, a higher negative predictive value of the test, and a safe extension of the time interval between screenings. However, the introduction of the HPV test as a primary screening test is not so simple and requires strict testing quality control and elaborate guidelines to ensure an optimal strategy and prevent additional burden on the healthcare system. This review presents the national cervical cancer screening program in the Republic of Croatia, the problems that prevented the start of a pilot project in one Croatian county selected for the introduction of the HPV test as a primary screening test in the prevention of cervical carcinoma, and the tasks ahead in the next period which would ensure the smooth implementation of the pilot project and implement the HPV test as the primary screening test in Croatia. Based on the results of the pilot project, it is necessary to precisely define: the age at which primary HPV testing should start and stop in the cervical cancer screening program, the examination interval after a negative primary HPV test, further procedures with women with a positive primary HPV test, the procedures for conducting reflex cytological testing and further treatment of the patient in accordance with the findings, the possibilities and justification of introducing self-sampling as part of the cervical cancer screening program based on the HPV test as the primary screening test, and finally the type of HPV test that is most suitable for the primary screening in Croatia.

Prevalence and genotype distribution of human papillomavirus infection among HIV-infected men who have sex with men living in Lower Silesia, Poland.

Human papillomavirus (HPV) is the most common sexually transmitted infection worldwide and is associated with the risk of anogenital and oropharyngeal cancers. Men who have sex with men (MSM) are at a high risk of HPV infection. However, little up-to-date data are available regarding the prevalence of HIV and HPV co-infection in MSM in Poland. To evaluate the prevalence, genotype distribution and risk factors for HPV infection among HIV-positive MSM living in Lower Silesia. A total of 54 HIV-positive and 28 HIV-negative MSM participated in the study. The polymerase chain reaction was performed to detect HPV from oral and anal swabs. A self-applied written questionnaire was conducted to collect sociodemographic and behavioural data. The prevalence rates of oral and anal HPV infection were higher in HIV-infected MSM than in HIV-negative MSM. Statistical analysis showed that the prevalence of high oncogenic genotypes, HPV 16 and HPV 18, at the anal site was significantly higher in patients with lower CD4 cell counts, in addition, HPV 18 infection was significantly more frequent in patients with higher levels of HIV RNA. Moreover, HPV 33 and HPV 52 at the anal site were significantly more common in patients with lower nadir CD4. This is the first report of HPV infection among Polish HIV-infected MSM. Our results show that HIV-related immunodeficiency is associated with a higher prevalence of high-risk HPV infections, therefore early detection of HIV infection and initiation of antiretroviral therapy might reduce the risk of HPV-related diseases.

Cervical, oral and anal Human papillomavirus infection in women attending the Dermatology Unit of a regional reference hospital in Genoa, Italy: a prevalence study.

Between January 2016 and December 2018, the female patients attending the STI center (cases) and those requiring a full body skin examination for skin cancer screening ("supposed" healthy population: controls) were recruited. Cervical/anal/oral samples were collected with ThinPrep liquid based cytology preparation system: polymerase chain reaction for HPV and cytological evaluation were performed. Overall, 85 cases and 31 controls were recruited. Cervical HPV infection was detected in 60% of the cases and 48% of the controls; anal HPV infection in 44% of the cases and 26% of the controls. Cervical and anal HPV infection resulted associated, especially in the control group. Moreover, 32% of the cases and 29% of the controls proved HPV positive in the oral cavity. In the cases of our series, prevalence of cervical, anal and oral HPV infection was higher compared with the controls. The high prevalence of anal-oral infections and the frequent association between anal and cervical infections, provide reason to suggest HPV screening also in the anal and oral regions, which may represent HPV reservoirs and grounds for cancer development.

The Prevalence of Cervical HPV Infection and Genotype Distribution in 856,535 Chinese Women with Normal and Abnormal Cervical Lesions: A Systemic Review.

Cervical cancer is the commonest cancer affecting women worldwide. During the last decades, the incidence and mortality rates of cervical cancer have increased in China. This research aims to assess the overall and genotype-specific prevalence of the human papillomavirus (HPV) infection among Chinese women with normal cervix, considering age, and geographic location. We selected studies about HPV prevalence in women from Chinese in Mainland China with normal cervix and abnormal cervical lesions, published between January 1995 and December 2020. The HPV prevalence was analyzed using meta-analysis based on the following: cytological and histological diagnoses, regions, and ages. The overall HPV prevalence in 856,535 women was 14.3%, 95% confidence interval (CI) and it increased from 8.2% to 16.5% in studies published from 2006 to 2020. The prevalence of high-risk (HR) and low-risk (LR) HPV types was 11.3% and 2.7%, respectively. The commonest types of HPV in women from Mainland China were HPV 16 (2.6%), 52 (2.4%), 58 (1.7%), 18 (0.9%), and 33 (0.8%). According to the geographical analysis, the prevalence of different HPV genotypes varied by region, Central China had the highest overall HPV prevalence. HPV16 was the commonest type in all the regions except in South China and East China, where HPV52 was found to be common. Regarding diagnosis, the HPV infection led to cervical cancer diagnosis by cytology and histology with 90.1% and 91.5% rates, respectively. HPV16 and HPV18 were common types associated with cervical cancer diagnosed by cytology and histology. HPV 16, 58, 52, 18, and 33 were the commonest types found in women with normal cervixes from Mainland China. The prevalence of different HPV genotypes varied by age group and region.

Molecular Genotyping of Human Papillomaviruses (HPV) in HIV+ and HIV− Women in Senegal

Background: Different studies have demonstrated high prevalence of HPV infection and dysplastic lesions of the cervix in immunocompromised patient such as women living with HIV. Is this high prevalence due to a greater susceptibility to HPV infection, which is known to be frequent in its latent form in women? Objective: This study aims to identify HPV genotypes in HIV+ and HIV− women to understand HPV molecular epidemiology in Senegal. Material and Method: Endocervical samples from 331 HIV+ and HIV− women, sexually active, were collected. The molecular identification of the 28 genotypes studied (19 HPV-HR and 9 HPV-LR) was carried out after DNA extraction, by multiplex PCR with the Anyplex™ II HPV28 detection kit from Seegene on CFX96™ Bio-Rad machine. The comparisons were made by calculating the p-value and odds ratio with R Studio software (version 4.1.0). The results were considered significant if p − women. Conclusion: Our results showed that the prevalence of HPV, HPV-HR and HPV-BR was significantly higher in HIV+ women. Non-vaccine genotypes were among the most found genotypes. Groups of HIV+ women aged between 35 and 50, married and using contraception were significantly more infected with HPV than the same groups of HIV-women.

Prevalence characteristics of cervical human papillomavirus genotypes in Nanning, China: A 10-year survey of 77,756 women from one medical center.

The prevalence of human papillomavirus (HPV) infection and HPV genotypes varies in different regions. However, there is little data on HPV prevalence and genotyping in Guangxi Province, South China. This study conducted a 10-year survey in a health center, to estimate the prevalence characteristics of HPV genotypes. By using polymerase chain reaction (PCR) amplification and nucleic acid molecular hybridization, the HPV genotypes were detected from 77,756 females who were patients of the Department of Obstetrics and Gynecology and those who visited the Health Management Center for a physical examination between August 2011 and November 2020. The prevalence, genotypes, age-related HPV infections, as well as chronological change of HPV prevalence, and the HPV genotype distribution were analyzed. The overall prevalence of HPV infection was 21.14% (16,439/77,756). The HPV infection rate differed significantly between the patients of the Department of Obstetrics and Gynecology and the women who underwent a physical examination (22.98% vs. 9.88%, p < 0.05). The prevalence rates of high-risk HPV, low-risk HPV, mixed HPV (mixed high-risk, and low-risk HPV infection), and multiple HPV infections were 18.96% (14,739/77,756), 4.09% (3178/77,756), 1.90% (1478/77,756), and 4.94% (3838/77,756), respectively. The most prevalent genotypes were HPV 52, 16, and 58. The age-associated HPV prevalence showed bimodal curves, with the first peak at <25 years and the second peak at >56 years. This study provides baseline data on the HPV prevalence in the general female population of Nanning, Guangxi Province. Women <25 and >56 years old faced the greatest threat of HPV infection, and HPV 52, 16, and 58 were the most common genotypes.

Willingness to human papillomavirus (HPV) vaccination and influencing factors among male and female university students in China.

This study compared the willingness to receive human papillomavirus (HPV) vaccination and the influencing factors between male and female university students who had never been vaccinated against HPV in China. University students were recruited from seven universities in China. A self‐administered questionnaire was used to collect information about demographic characteristics, willingness to HPV vaccination, and possible influencing factors including demographics, knowledge, and attitude toward HPV vaccination. The χ 2 test was used to test the difference between males and females' knowledge and attitudes to HPV vaccination. Multivariate logistic regression was employed to detect the factors associated with willingness to HPV vaccination. A total of 7335 university students participated in the survey (3570 males and 3765 females). Over 70% of the participants had previously received sex education and knowledge. The average age of sexual debut was 17.5 years old. More male students reported acceptance of premarital sex than female students did (χ 2 = 708.458, p < 0.001). Female students had better knowledge and attitudes to HPV in general, while male students perceived a higher chance of being infected by HPV compared with female students (χ 2 = 6.047, p = 0.014). The level of knowledge (male: adjusted odds ratio [AOR] = 1.935, 95% confidence interval [CI]:1.516–2.470; female: AOR = 1.227, 95% CI: 1.055–1.428) and receiving sex education (male: AOR = 1.414, 95% CI: 1.109–1.804; female: AOR = 1.289, 95% CI: 1.064–1.562) were indicators of the HPV vaccination willingness for both genders. For male students, those who had ever inoculated optional self‐paid vaccines were more likely to receive the HPV vaccine than those who had not (AOR = 1.567, 95% CI: 1.242–1.977). Female students were more willing to be vaccinated against HPV, if they had higher living expenses (AOR = 1.395 and 3.717, 95% CI: 1.071–1.426 and 1.776–7.752), relatives or friends had certain cancer (AOR = 1.290, 95% CI: 1.095–1.518), ever had sexual experiences (AOR = 2.628, 95% CI: 1.788–3.863), and had ever consulted on HPV vaccination issues (AOR = 1.612, 95% CI: 1.367–1.901). In China, more active education should be provided to improve university students' knowledge and attitudes on HPV and HPV vaccination. Including HPV vaccine uptake for both males and females at recommended ages in National Immunization Program would be the most cost‐effective way to prevent HPV infection.

The Prevalence of High- and Low-Risk Types of HPV in Patients with Squamous Cell Carcinoma of the Head and Neck, Patients with Chronic Tonsillitis, and Healthy Individuals Living in Poland.

Human papillomavirus (HPV) is a virus with the potential to infect human epithelial cells and an etiological agent of many types of cancer, including head and neck cancer. The aim of the study was to determine the prevalence of HPV infection in patients with head and neck squamous cell carcinoma (HNSCC), patients with chronic tonsillitis, and healthy individuals, and to establish high- and low-risk HPV genotypes in these groups. The objectives also comprised the delineation of the relationship between the infection with high- or low-risk HPV subtypes and clinicopathological and demographic characteristics of the study groups. This study was composed of 76 patients diagnosed with HNSCC, 71 patients with chronic tonsillitis, and 168 cases without either of these conditions (the control group). HPV detection and identification of subtypes were performed on isolated DNA using a test which allowed detection of 33 common high-risk and low-risk HPV subtypes. The prevalence of HPV infection was 42.1%, 25.4%, and 37.5% in HNSCC, chronic tonsillitis, and control groups, respectively. HPV 16 was the most prevalent genotype in all groups and the non-oncogenic HPV 43/44 was frequent in HNSCC patients. This analysis provides insight into the prevalence of oral oncogenic and non-oncogenic HPVs in patients with head and neck cancer, patients with chronic tonsillitis and healthy individuals, and leads to the conclusion that further investigations are warranted to examine a larger cohort of patients focusing on high- and low-risk HPV genotypes. Efforts should be focused on screening and prevention strategies, and therefore, it is important to introduce tools for effective detection of HPV genotypes. Furthermore, given the role of vaccines against oral HPV infection, our observations lead to the suggestion that HPV vaccination should be of considerable importance in public health strategies.

Human Papillomavirus Prevalence in Urine Samples of Asymptomatic Male Sexual Partners of Women with Sexually Transmitted Diseases.

Human papillomavirus (HPV) infection in males is associated with various cancers, including cervical cancer in women and penile and bladder cancers in men. However, there is limited research on the prevalence and prevention of male HPV infection. Moreover, a rapid test that can prevent the increase in HPV infection is needed. In this study, the prevalence of sexually transmitted pathogen (STP) and HPV infection was analyzed using real-time polymerase chain reaction assay in random urine samples collected from asymptomatic male sexual partners of women with sexually transmitted diseases. Among 130 men, 65 (50.0%) had STP and 12 (9.23%) had HPV infection. There was no association between STP and HPV infection. Among 12 cases of HPV infection, three were HPV-16 single infections, six were multiple infections, including HPV-16, and three of other high-risk HPV infections. Our results suggest the need for STP testing, including HPV testing, in sexual partners of high-risk women with sexually transmitted diseases, even in men without clinical symptoms (asymptomatic). Further research should be conducted by diversifying urine samples. We report the most convenient method for HPV detection, and it is expected to be widely applied to prevent sexually transmitted diseases in men and women.

An Analysis of HPV Infection and Distribution in Cervical and Genital Samples With Condyloma Acuminatum: A Retrospective Study

Objective: Human papillomavirus (HPV) causes condyloma acuminata, which is one of the most widespread sexually transmitted diseases. This study was aimed to evaluate the prevalence of HPV infection and HPV genotype distribution in patients with condyloma acuminatum in Urumqi, China. Methods: A total of 835 cervical and genital samples were collected from outpatients treated for condyloma acuminatum between December 2016 and December 2018. HPV genotyping was performed with the HPV Genotyping Real-time PCR Kit for 23 different HPV types. Statistcal analysis was conducted using the chi-square test. Results: The total prevalence of HPV infection was 80.72% (674/835) in patients with condyloma acuminatum in Urumqi. The HPV genotypes were HPV-6 (372/835, 44.55%), HPV-11 (180/835,21.56%), HPV-16 (91/835,10.90%), HPV-43 (65/835, 7.78%), HPV-42 (56/835, 6.71%), and HPV-58 (53/835, 6.35%). Among HPV-infected individuals, 49.11% (331/674) were infected by a single HPV subtype, while 50.89% (343/674) were infected by multiple HPV subtypes. The prevalence of HPV infection was higher in females (82.14%, 276/336) than in males (79.76%, 398/499) (χ 2 = 0.73, P=0.39), and higher in other ethnicities (86.36%, 133/154) than in people of Han ethnicity (79.76%, 541/ 681) (χ 2 = 3.866, P=0.049). The peak prevalence of HPV infection was observed in the age groups of 20–29 years and 30–39 years. Conclusion: HPV infection was detected in most patients with condyloma acuminatum in Urumqi with prevalence of 80.72%, and the most common HPV types were HPV-6, -11, -16, -43, -42, and -58. The detection of HPV genotypes is very important to monitor HPV infection so that effective treatment is administered to patients with condyloma acuminatum.

Genotypic distribution and prevalence of human papillomavirus infection in an apparently healthy female population in Bangladesh

ObjectiveHuman papillomavirus (HPV) comprises around 120 genotypically related viruses, classified into low- and high-risk HPVs, which are capable of replicating inside the keratinocytes of skin or mucous membranes. Studies suggest that infections with HPV-16 or HPV-18 have a higher rate of developing cancer. The aim of our study was to detect HPV early, and to estimate the genotype-specific prevalence of HPV in apparently healthy and asymptomatic females in Bangladesh. MethodAfter cervical swab specimen collection, a VIA test was performed to identify any type of abnormality in the cervix. A multiplex PCR amplification of HPV DNA, using L1 consensus primer systems, was performed with type-specific primers, followed by sequencing to detect HPV genotypes. ResultOf the 417 females, 121 were found to be HPV positive. The most prevalent high-risk HPV genotypes were found to be HPV-16 and HPV-18. Different patient demographic parameters, such as age, socioeconomic status, education, and history of first intercourse, were also studied to establish correlations with HPV infection. ConclusionOur results might provide some insights into factors that influence the development of cervical cancer. They might also help in guiding better patient management, increased public health awareness, further testing, and the implementation of existing vaccines.

Analysis of the Conversations on Twitter regarding HPV Vaccine

Background and objectives Infection with human papillomavirus (HPV) is the main cause of cervical cancer, and vaccination is an effective method to prevent HPV infection. In Japan, adverse reactions were reported in some HPV-vaccinated people in March 2013, and while Japan’s Ministry of Health, Labor, and Welfare withdrew active recommendation of the vaccine in June 2013, the social movement to refuse vaccination has continued. The Ministry of Health, Labor, and Welfare (MHLW) has devised a plan to accurately disseminate information that promotes vaccination, but less than 1% of the eligible population was vaccinated, and the number has not increased. Besides, inaccurate information about health information can disseminate rapidly on social networks. Social networking services (SNS), mainly used by young people, can be used by the public to obtain medical information. However, according to the World Health Organization (WHO), SNSs are prone to spreading inauthentic and misleading information when it comes to information related to health and medical care. “Infodemic” is defined as a situation in which unidentified and false information is widely disseminated on SNS, causing WHO to issue international alerts. This study aimed to organize information about HPV vaccination disseminated on SNS in Japan. Methods We extracted 208 tweets with the keyword “HPV vaccine” posted in Japan between April 1, 2014, and September 30, 2017. The extracted tweets included data points such as ID, language, posting date and time, and latitude and longitude. The location information of the senders was obtained from the latitude and longitude, and the tweets were organized by prefecture, city, town, village, and ID. Then, we evaluated whether the information at the URLs was accurate by examining retweets, likes, and the number of comments on the tweet. Python version 3.7.7 was used to extract the tweets. Results The results of classification of the tweets by prefecture are as follows: the Hokkaido prefecture accounted for four tweets; the northeast, six tweets; southern Kanto, 123 tweets; northern Kanto-Koshin, six tweets; Hokuriku, five tweets; Tokai, 35 tweets; Kinki, 10 tweets; Chugoku 4 tweets; Shikoku, three tweets; and Kyushu, nine tweets. A total of 93 users posted tweets; four users posted five or more tweets; 14 users posted 2–4 tweets, and 75 users posted one tweet. In particular, 66 tweets in Kanagawa prefecture, 14 tweets in Shizuoka prefecture, and two tweets in Tokyo were posted from the same ID. Regarding the type of tweet, there were 109 tweets, 65 retweets, and 34 replies. There were 137 tweets with and 71 tweets without URLs. When organized by the linked URL, 50 posts linked to a blog, 46 posts linked to a news item, seven posts linked to Facebook, five posts linked to a government agency homepage, four posts linked to YouTube, three posts linked to the home page of the City Council rep, two posts linked to a medical site, and 20 posts linked to other sources that could not be categorized. In terms of the authenticity of the posts, 25 tweets were judged as “accurate,” 14 were judged to be “inaccurate,” and 16 were judged as “unknown.” We classified the posts as follows; “accurate” for those that contained accurate information and “inaccurate” for those that contained inaccurate information. Discussion The distribution of tweets and the uneven distribution of the users suggest that few people spread information about the HPV Vaccine on Twitter in Japan. Regarding the content, more than half of the tweets could not be judged as accurate or inaccurate because the verification results regarding adverse reactions of the HPV vaccine were not published at the time of sending, and in news and blog articles, personal opinions were stated rather than authentic medical information. In this study, we clarified the characteristics of tweets regarding HPV vaccination in Japan and the status of transmission. In the future, it will be necessary to change the keywords and time periods for which tweets need to be extracted, and the data set used for the analysis will need to be compared and examined.

Differences in HPV infection and HPV-related lesions between the cervix and anus in hiv-positive women

Introduction: the prevalence of cervical and anal human papillomavirus (HPV) infection in women infected with human immunodeficiency virus (HIV) is high. However, little is known about the differences in the susceptibility of these infections and related lesions. The aim of this study was to describe the association between the prevalence of cervical and anal HPV infection and HPV-related lesions in HIV-positive women. Methods: this study included 88 HIV-positive women attending an outpatient clinic in a university hospital. Ectocervical, endocervical, and anal samples were collected for colpocytology and anal cytology. A polymerase chain reaction-based technique was used to detect HPV deoxyribonucleic acid in endocervical and anal swab samples. Results: the cervical and anal HPV positivity rates were 35.21% and 78.8%, respectively. The presence of HPV-related lesions on colpocytology was associated with anal HPV positivity (P = 0.027). The ratio between cervical HPV infection and cervical HPV-related lesions was 2.5. The ratio between anal HPV infection and anal HPV-related lesions was 4.3. Overall, 30% had concomitant HPV DNA in the cervix and anus. Conclusion: there are differences in the susceptibility of infections and related lesions between the cervix and anus. Despite a higher incidence of anal HPV, the progression to HPV-related lesion does not occur via the same manner in the cervix and anus. Moreover, cervical HPV-related lesions in HIV-positive women may serve as a cue for anal preventive strategies, and further investigations in these women may be useful.

Prevalence, Types, and Factors of HPV Infection Among Women With Abnormal Cervical Cytology Screening at Ramathibodi Hospital

Background: Cervical cancer is the second leading cancer among Thai women. Human papillomavirus (HPV) is the most common cause of cervical cancer. HPV16 and HPV18 are the most prevalence types in women with cervical cancer.&#x0D; Objectives: To study the prevalence and types of HPV infection and its associated risk factors among women with abnormal cervical cytology screening.&#x0D; Methods: This cross-sectional study purposively recruited 376 women who had abnormal cervical cytology screening by liquid-based cytology at the outpatient clinic, Ramathibodi Hospital from August 2015 until March 2016. HPV genotyping was done by the polymerase chain reaction (PCR). Analysis of the personal characteristics was done using descriptive statistics.&#x0D; Results: The prevalence of HPV infection was 41.5%. Among them, a single infection was found in 78.8% of women. The most common genotypes were HPV16 (8.5%) and HPV52 (7.7%). But HPV18 was found in only 1.9%. The characteristic which was significantly associated with HPV infection was age, nulliparity, and high-graded dysplasia (P &lt; .05).&#x0D; Conclusions: High prevalence rate of HPV infection was found among women with abnormal cytology. High-risk HPV prevalence and type distribution may be useful for public health authorities in assessing the cervical screening program.&#x0D;

Receipt of HPV Vaccine Associated with Increased Prevalence of High-Risk HPV Infections

Identifying possible negative side effects of vaccines helps to determine whether benefits outweigh the costs of a medical intervention that claims to prevent a disease. Such a cost-benefit analysis is essential both for vaccine policy as well as informed consent. This study seeks to determine whether the use of the human papillomavirus (HPV) vaccine is related to an increase in high-risk (HR), possibly cancer related, HPV infections. Data from the U.S. National Health and Examination Nutrition Survey reveal a statistically significantly higher percentage of women who received an HPV vaccine carried an HR-HPV than women who did not receive an HPV shot (Rao-Scott Chi-square contrast p-value of 0.002). Vaccine recipients tested positive less frequently for HPVs targeted by the vaccines, but had a higher prevalence of other HR (cancer related) HPVs. The results suggest that a thorough investigation of the effects of HPV vaccines on HR-HPV viruses (and other pathogens) not targeted by them is warranted.

Sociodemographic determinants of catch-up HPV vaccination completion between 2016-2019 in Norway

ABSTRACT Between 2016 and 2019, a catch-up human papillomavirus (HPV) vaccination took place in Norway for women born between 1991 and 1996. The aim of this study was to identify sociodemographic determinants of complete vaccination (3 doses) and partial vaccination (1–2 doses). A random sample of 10,000 women who were offered catch-up HPV vaccination were invited. We assessed the association between sociodemographic characteristics and vaccination completion using univariable and multivariable multinomial logistic regression. Of 4,967 respondents, 3,464 (63%) received complete vaccination and 298 (7%) received partial vaccination. 30% did not receive any vaccination and functioned as reference group. Compared with having Norwegian caregivers, having a caregiver from non-western countries decreased the odds of partial and complete vaccination (aOR = 0.57; 95%CI = 0.35–0.95 and aOR = 0.57; 95%CI = 0.44–0.74). Having a caregiver from other western countries decreased the odds of complete vaccination (aOR = 0.72; 95%CI = 0.52–0.98). Residing in Norway for 10 years or longer significantly increased the odds of complete vaccination (aOR = 2.65; 95%CI = 1.58–4.43). Being in a relationship significantly increased the odds of partial vaccination compared with being single (aOR = 1.50; 95%CI = 1.02–2.21). Being married (aOR = 0.66; 95%CI = 0.50–0.86) and having children (aOR = 0.53; 95%CI = 0.42–0.68) decreased the odds of complete vaccination. Having university education increased the odds of both partial and complete vaccination (aOR = 2.19; 95%CI = 1.47–3.25 and aOR = 4.11; 95%CI = 3.33–5.06). Having a caregiver born outside of Norway, having children and being married decreased the odds of receiving complete HPV vaccination. This highlights the need to target communication around HPV vaccination toward different ethnic communities and include more specific messaging that having children and being married does not necessarily prevent HPV infections.

Anal human papillomavirus prevalence and risk factors among men who have sex with men in Vietnam

ObjectivesMen who have sex with men (MSM) are at risk of human papillomavirus (HPV)-related cancers, while published data are scarce. This study determined HPV prevalence and risk factors in MSM in Vietnam to inform HPV prevention strategies in this key population. MethodsA cross-sectional study of 799 MSM aged 16-50 years was conducted in Vietnam in 2017-2018. Information was collected on risk behaviours, and knowledge of HPV and anal cancer; rectal swabs were taken to detect anal HPV infection. An in-house polymerase chain reaction and Genoflow HPV array test kit were used for HPV detection and genotyping. ResultsThe median age of the study participants was 25 years (range 18-52). Overall prevalence of any HPV and HPV16/18 infection was 32.3% and 11.0%, respectively. A higher prevalence of high-risk HPV infection to all 14 types tested was found in Ho Chi Minh City (30.9%) than in Hanoi (18.4%). High-risk HPV infection was associated with inconsistent condom use and history of engaging in sex under the influence of drugs (adjusted odds ratio (aOR), 2.27; 95% CI, 1.48-10.67), as well as having multiple sexual partners (aOR, 1.01; 95% CI, 1.00–1.02). ConclusionsHigh-risk anal HPV infections in Vietnamese MSM were significantly associated with risky sexual behaviours. A targeted HPV vaccination strategy would have substantial benefit for MSM in Vietnam.

Infection with Human Papilloma Virus (HPV) and risk of subsites within the oral cancer

BackgroundThe aim of this study was to investigate the relationship between high-risk genotypes of Human Papilloma Virus (HPV) and cancer of different subsites of the oral cavity. Material and methodsA pooled analysis of five studies included on the International Head and Neck Cancer Epidemiology (INHANCE) Consortium was conducted. HPV 16 and HPV 18 were considered. Adjusted odds ratios (ORs) and corresponding 95 % confidence intervals (CIs) for HPV and each oral cavity subsites were simultaneously estimated using multinomial logistic regression models. ResultsThe analysis included 1157 cases and 3272 controls. This study showed a slightly higher prevalence of HPV infection among oral cancer cases than controls. In particular, an increased risk of other and not otherwise specified (NOS) sites within the oral cavity, oral tongue, palate and floor of mouth cancer was observed for overall HPV16 positivity (OR = 1.66, 95 % CI: 1.01−2.72; OR = 1.97, 95 % CI: 1.36−2.85; OR = 2.48, 95 % CI: 1.50−4.11; OR = 2.71, 95 % CI: 1.06−6.95, respectively). In particular, HPV16E7 was related to cancer of floor of mouth, oral cavity NOS and palate (OR = 2.71, 95 % CI: 1.06−6.95; OR = 3.32, 95 % CI:1.53−7.19; OR = 3.34, 95 % CI:1.38−8.06). Results were inconsistent for HPV18 due to low prevalence of infection. ConclusionOur study suggests that HPV16 infection may increase the risk of developing floor of mouth, gum, tongue, and palate cancers. Clinical relevanceSubjects with HPV infection have a higher risk of cancer from all sites of the oral cavity.

Design and methods for the Carrageenan-gel Against Transmission of Cervical Human papillomavirus (CATCH) study: A randomized controlled trial

Human papillomavirus (HPV) infection, a common sexually transmitted infection, is causally associated with cervical cancer. Vaccination against HPV provides protection; however, HPV vaccines are exclusively prophylactic. Carrageenan, an extract from red algae, demonstrated potent anti-HPV activity in in vitro and animal studies. We describe the protocol for the Carrageenan-gel Against Transmission of Cervical Human papillomavirus (CATCH) study, an ongoing randomized controlled trial among sexually active young females, aimed at evaluating the efficacy of a carrageenan-based gel in reducing type-specific incidence (i.e. new detections of HPV) and prevalence (i.e. absence of a previously detected HPV) of genital HPV infections as well as participant adherence to the intervention. The CATCH study is a phase IIB double-blind randomized placebo-controlled trial. Eligible women 18 years and older are randomized 1:1 to the carrageenan-containing gel or placebo gel arm. For the first month, participants use the study gel intra-vaginally every other day, and over the 12-month study period, prior to and after each act of vaginal intercourse. At each study visit (months 0, 0.5, 1, 3, 6, 9, 12), participants provide a self-collected vaginal sample and record information on sexual activities, adherence, and adverse events using a computerized questionnaire. The primary outcomes are incident and prevalent type-specific cervicovaginal HPV infection. The primary analyses are based on intention-to-treat whereas per-protocol analyses are conducted based on measures of adherence.Trial registration: ISRCTN96104919.

Human Papillomavirus (HPV) Prevalence and Type Distribution in Urban Areas of Malaysia.

Background:Cervical cancer is the third leading cause of death in Malaysia, and Human Papilloma Virus (HPV) is the principal aetiology that is responsible for its development. This study was aimed to determine the prevalence and distribution of HPV types among different age groups, ethnicity, and areas in Malaysia. Materials and Methods:A total of 764 women aged 20-74 years old within the cities of Johor Bahru, Kuala Lumpur, Ipoh, Penang, and Kota Kinabalu underwent both cervical cytological assessment and HPV DNA analysis. Cervical cytology glass slides were prepared using the liquid base technique (Path TEZT TM). HPV DNA was extracted using TANBead® Nucleic Acid Extraction Kit (Taiwan Advanced Nonotech Inc.), then the types were further identified using a DR.HPV Genotyping IVD kit. Results:The prevalence of HPV infection was 14.0% (107/764) with high-risk type at 10.7% (82/764) and low-risk type at 3.27% (25/764). The most common high-risk HPV types were HPV-52, 66, 33, 39, and 58 whereas low-risk HPV types were HPV-6, 40, and 81. The majority of HPV infections (80.37%) were detected in women with normal cytology results. The most prevalent HPV type among Chinese is 33 (n=6) followed by 16, 44, 58, 66 and 68 (n=5). Among Malays, HPV 16 and 51 were the two most prevalent types (n=2). The sensitivity of the HPV DNA test compared to cytology was 100% with a specificity of 88.37%.Conclusion:This study revealed that the most common high-risk HPV type among women living in urban areas in Malaysia is HPV 52, unfortunately which is not the type of infection the current HPV vaccine is covered for protection among females. These findings may contribute beneficial information to health care providers for the appropriate use of HPV vaccine in the prevention of cervical cancer in Malaysia.