scholarly journals Recurring infection with ecologically distinct human papillomavirus (HPV) types explains high prevalence and diversity

2017 ◽  
Author(s):  
Sylvia Ranjeva ◽  
Edward B. Baskerville ◽  
Vanja Dukic ◽  
Luisa Villa ◽  
Eduardo Lazcano-Ponce ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Transmitted Infection ◽  
Sexually Transmitted ◽  
Hpv Prevalence ◽  
Increased Risk ◽  
High Prevalence ◽  
Hpv Types ◽  
One Year ◽  
The One ◽  
The Impact

AbstractThe high prevalence of human papillomavirus (HPV), the most common sexually transmitted infection, arises from the coexistence of over 200 genetically distinct types. Accurately predicting the impact of vaccines that target multiple types requires understanding the factors that determine HPV diversity. The diversity of many pathogens is driven by type-specific or “homologous” immunity, which promotes the spread of variants to which hosts have little immunity. To test for homologous immunity and to identify mechanisms determining HPV transmission, we fitted nonlinear mechanistic models to longitudinal data on genital infections in unvaccinated men. Our results provide no evidence for homologous immunity, instead showing that infection with one HPV type strongly increases the risk of infection with that type for years afterwards. For HPV16, the type responsible for most HPV-related cancers, an initial infection increases the one-year probability of reinfection by 20-fold, and the probability of reinfection remains 14-fold higher two years later. This increased risk occurs in both sexually active and celibate men, suggesting that it arises from auto-inoculation, episodic reactivation of latent virus, or both. Overall our results show that high HPV prevalence and diversity can be explained by a combination of a lack of homologous immunity, frequent reinfections, weak competition between types, and variation in type fitness between host subpopulations. Due to the high risk of reinfection, vaccinating boys that have not yet been exposed may be crucial to reduce prevalence, but our results suggest that there may also be large benefits from vaccinating previously infected individuals.

scholarly journals Recurring infection with ecologically distinct HPV types can explain high prevalence and diversity

2017 ◽  
Vol 114 (51) ◽  
pp. 13573-13578 ◽  
Author(s):  
Sylvia L. Ranjeva ◽  
Edward B. Baskerville ◽  
Vanja Dukic ◽  
Luisa L. Villa ◽  
Eduardo Lazcano-Ponce ◽  
...  
Keyword(s):  
Mechanistic Models ◽  
Sexually Active ◽  
Risk Of Infection ◽  
Transmitted Infection ◽  
Sexually Transmitted ◽  
Hpv Prevalence ◽  
Increased Risk ◽  
High Prevalence ◽  
Hpv Types ◽  
The Impact

The high prevalence of human papillomavirus (HPV), the most common sexually transmitted infection, arises from the coexistence of over 200 genetically distinct types. Accurately predicting the impact of vaccines that target multiple types requires understanding the factors that determine HPV diversity. The diversity of many pathogens is driven by type-specific or “homologous” immunity, which promotes the spread of variants to which hosts have little immunity. To test for homologous immunity and to identify mechanisms determining HPV transmission, we fitted nonlinear mechanistic models to longitudinal data on genital infections in unvaccinated men. Our results provide no evidence for homologous immunity, instead showing that infection with one HPV type strongly increases the risk of infection with that type for years afterward. For HPV16, the type responsible for most HPV-related cancers, an initial infection increases the 1-year probability of reinfection by 20-fold, and the probability of reinfection remains 14-fold higher 2 years later. This increased risk occurs in both sexually active and celibate men, suggesting that it arises from autoinoculation, episodic reactivation of latent virus, or both. Overall, our results suggest that high HPV prevalence and diversity can be explained by a combination of a lack of homologous immunity, frequent reinfections, weak competition between types, and variation in type fitness between host subpopulations. Because of the high risk of reinfection, vaccinating boys who have not yet been exposed may be crucial to reduce prevalence, but our results suggest that there may also be large benefits to vaccinating previously infected individuals.

Human papillomavirus infection among male clients of female sex workers soliciting sex in brothels in Peru

2017 ◽  
Vol 29 (2) ◽  
pp. 178-184 ◽  
Author(s):  
Jenell Stewart ◽  
Martha Calderon ◽  
Alison Hathaway ◽  
Rachel L Winer ◽  
Joseph Zunt
Keyword(s):  
Human Papillomavirus ◽  
Sex Workers ◽  
Female Sex Workers ◽  
Transmitted Infection ◽  
Hpv Dna ◽  
Sexually Transmitted ◽  
Female Sex ◽  
Male Clients ◽  
Hpv Prevalence ◽  
The Difference

The prevalence of high-risk human papillomavirus (HR-HPV) has been reported to be three times higher in female sex workers (FSWs) in Callao, Peru than in the general population of women in Peru. Prevalence of HR-HPV among male clients has not yet been reported. A total of 150 men soliciting intercourse in sex work venues submitted questionnaires, samples for sexually transmitted infection (STI) testing, and self-collected penile samples prior to and following intercourse for HPV genotyping. We identified variables associated with pre-coital HR-HPV, and compared HR-HPV detection pre- and post-coitus. Prior to intercourse, HR-HPV prevalence was 41.9%. Married clients were less likely than unmarried clients to have HR-HPV detected ( p = 0.03). While post-coital HR-HPV prevalence was higher (47.6%), the difference was not statistically significant. However, there was a significant increase in the mean number of HR-HPV DNA strains detected before (0.75) and after (0.94) intercourse ( p = 0.02). No cases of gonorrhoea or syphilis and six (4.1%) cases of chlamydial infection were detected. Despite low prevalence of other STIs, male clients had a high HR-HPV prevalence. The increase in detection of HR-HPV following intercourse demonstrates a potential for transmission of HR-HPV despite high self-reported condom use.

scholarly journals Prevalence of Human Papillomavirus (HPV) infection in women living in remote riverine communities in the Amazonas, Brazil

2019 ◽  
Author(s):  
Marco Antonio Zonta ◽  
Karina Bonilha Roque ◽  
Yara Juliano ◽  
Anne Liljander ◽  
Markus Cavalar ◽  
...  
Keyword(s):  
Cervical Cancer ◽  
Human Papillomavirus ◽  
Hpv Infection ◽  
Public Health Services ◽  
Cervical Lesions ◽  
Transmitted Infection ◽  
Sexually Transmitted ◽  
Remote Areas ◽  
Hpv Types ◽  
Crucial Part

Abstract Human papillomavirus (HPV) is the most common sexually transmitted infection worldwide. Since some HPV types are associated with the development of cervical cancer, routine screening for HPV plays a crucial part in cancer prevention programs at global level. In Brazil, the cervical cancer rate is among the highest in the world, in particular in indigenous women living in remote areas with limited access to public health services. The objective of this study was to determine the prevalence of HPV infections and their co-occurrence with cervical lesions in Brazilian women living in isolated riverine communities. Moreover, the association between social environment, sexual activity and prevalence of HPV infection was assessed.

scholarly journals The impact of non-steroidal anti-inflammatory drugs use in elderly cardiovascular patients: an observational study from tertiary care in South India

2019 ◽  
Vol 7 (5) ◽  
pp. 1787
Author(s):  
Sadhna Sharma ◽  
Biju Govind ◽  
Kondal Rao
Keyword(s):  
Observational Study ◽  
Elderly Patients ◽  
Tertiary Care ◽  
The Elderly ◽  
Left Ventricular ◽  
Risk Of Death ◽  
Increased Risk ◽  
High Prevalence ◽  
One Year ◽  
The Impact

Background: Long-term use of NSAIDs, by patients having cardiovascular conditions, has shown to increase the risk of cardiovascular events and increased risk of death. Hence, the study was conducted to determine the complications related to NSAID use by the elderly patients with cardiovascular disease (CVD).Methods: The study was a single-center prospective observational study conducted November 2017 to October 2018. Elderly patients (>60 years) suffering from various CVDs and reported NSAID intake daily for at least one month were included. A questionnaire included demographic, treatment related history and complete details of NSAIDs intake including nature, dose, indication, source etc. The same questionnaire was again filled at the end of one-year follow-up.Results: A total of 100 participants were included in the study. The mean age was 72±8.6 years. Majority of the patients (93%) had hypertension, and 69% of the patient had previous MI.  Five NSAIDs (diclofenac, ibuprofen, mefenamic acid, naproxen, and ketorolac) were used routinely. At least one over the counter NSAID used was reported by 86%, 57% were prescribed at least one NSAIDs by their orthopaedics and physicians. At the end of 1-year follow-up, authors found that 71% had MI (2% increase), 4% developed reinfarction, 20% had severe left ventricular failure (4% increase), 7% had atrial fibrillation (1% increase), and 2% patients died and 63% patients reported raise in systolic blood pressure by 5mmHg.Conclusions: High prevalence of concomitant NSAID use among elderly CVD patients, which might be contributing towards increase in CVS morbidity and mortality.

scholarly journals Prevalence of Oral Human Papillomavirus Infection among Indian HIV-Positive Men Who Have Sex With Men: A Cross-Sectional Study

2020 ◽  
Author(s):  
Alexandra Lydia Hernandez ◽  
Rajiv Karthik ◽  
Murugesan Sivasubramanian ◽  
Anantharam Raghavendran ◽  
Shelly Lensing ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Hpv Infection ◽  
Sexual History ◽  
Hiv Positive ◽  
Increased Risk ◽  
Oral Hpv ◽  
Hpv Types ◽  
Sex With Men ◽  
The Impact ◽  
Hiv Positive Men

Abstract Background: Oral human papillomavirus (HPV) infection has been causally linked to a subset of oropharyngeal cancers in Western populations15-20, and both oropharyngeal cancer and oral HPV infection are increased among HIV-positive individuals24,41. India has high incidences of oral and oropharyngeal cancers, and Indian HIV-positive men who have sex with men (MSM) may be at increased risk of developing oropharyngeal cancers. However, there is little information available on the prevalence of oral HPV in this population.Methods: We tested 302 HIV-positive Indian MSM for oral HPV infection using L1 HPV DNA PCR with probes specific for 29 types and a mixture of 10 additional types. CD4+ level and plasma HIV viral load (VL) were measured. Participants completed an interviewer-administered questionnaire including a sexual history.Results: The prevalence of oral HPV was 23.7% (95% CI: 19-29%) and 2.4% of participants had oncogenic HPV types. No participants had oral HPV type 16 (HPV-16) and the prevalence of other anogenital HPV types was low. Participants with higher CD4+ levels had reduced odds of having any oral HPV infection (OR: 3.1 [1.4-6.9]) in multivariable analyses.Conclusions: This is the first report of oral HPV among Indian HIV-positive MSM. Our results show a high prevalence of oral HPV infection consistent with studies from Western populations. However, oncogenic anogenital HPV types were relatively uncommon in our study population. It is unknown what the impact of this distribution of oral HPV will be on oropharyngeal cancers. HIV-positive MSM in India should be monitored closely for oral and oropharyngeal pre-cancer and cancer.

scholarly journals Prevalence of Human Papillomavirus, Human Immunodeficiency Virus, and Other Sexually Transmitted Infections Among Men Who Have Sex With Men in Togo: A National Cross-sectional Survey

2018 ◽  
Vol 69 (6) ◽  
pp. 1019-1026 ◽  
Author(s):  
Valentine Marie Ferré ◽  
Fifonsi A Gbeasor-Komlanvi ◽  
Gilles Collin ◽  
Anoumou Claver Dagnra ◽  
Quentin Le Hingrat ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Papillomavirus ◽  
Sub Saharan Africa ◽  
National Study ◽  
Transmitted Infection ◽  
Cross Sectional ◽  
Sexually Transmitted ◽  
Increased Risk ◽  
Immunodeficiency Virus ◽  
Sex With Men

Abstract Background Sub-Saharan Africa is a region of both high human immunodeficiency virus (HIV) and anal cancer incidence. We conducted the first national study in Togo to assess human papillomavirus (HPV), HIV, and other sexually transmitted infection (STI) prevalence among men who have sex with men (MSM). Methods A multicentric cross-sectional study was conducted among MSM recruited in 4 Togolese cities. Anal swabs were collected to test HPV, herpes simplex virus (HSV), and 7 STIs. Results Among the 207 MSM, HIV and high-risk HPV (hrHPV) overall prevalence were 26.1% and 44.9%, respectively. The most common hrHPV types were HPV-35 (15.0%) and HPV-16 (13.0%). Prevalence of hrHPV and multiple HPV infections were higher among HIV-infected than among HIV-uninfected MSM (85.2% vs 30.7%, P < 10–5 and 85.2% vs 28.7%, P < 10–5, respectively). Other STIs, except hepatitis B virus, were also more prevalent among HIV-infected MSM (Neisseria gonorrhoeae, P = .03; Mycoplasma genitalium, P = .04; HSV-2, P = .001; and a trend for Chlamydia trachomatis, P = .06). In multivariate analysis (adjusted odds ratio [95% confidence interval]), HIV (10.1 [4.0–25.6]), living in Lomé (2.8 [1.1–7.1]), HSV-2 excretion (26.7 [2.9–244.3]), C. trachomatis (11.7 [2.3–58.9]), and M. genitalium infection (9.6 [3.1–29.9]) were associated with increased risk of hrHPV infection. Conclusions We report a high burden of anal STIs with an unusual hrHPV type distribution among MSM, highlighting the critical need of implementation of a national strategy regarding prevention of STIs and vaccination against HPV.

scholarly journals High human papillomavirus prevalence among females attending high school in the Eastern Cape Province of South Africa

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253074
Author(s):  
Zizipho Z. A. Mbulawa ◽  
Nontuthuzelo I. Somdyala ◽  
Sikhumbuzo A. Mabunda ◽  
Anna-Lise Williamson
Keyword(s):  
South Africa ◽  
Human Papillomavirus ◽  
African Ancestry ◽  
Vaccination Strategy ◽  
Hpv Infection ◽  
Eastern Cape Province ◽  
Eastern Cape ◽  
Hpv Prevalence ◽  
Hpv Types ◽  
The Impact

As part of the human papillomavirus (HPV) vaccination strategy in South Africa, it is essential to have information on HPV prevalence, and HPV types distribution among the unvaccinated population. Information on the prevalence of HPV and the distribution of HPV types in adolescents and young women in South Africa’s Eastern Cape Province is minimal. Therefore, this study investigates the prevalence, distribution of HPV types, and factors associated with HPV infection amongst unvaccinated female learners. A sample composed of 213 sexually active female learners attending high schools in the Eastern Cape Province of South Africa; median age 18 years, who provided self-collected vaginal specimens. Roche Linear Array HPV genotyping assay that detects 37 HPV genotypes was used to detect HPV infection. HPV infection was detected in 76.06% (162/213) of participants. Of these 14.55% (31/213) were positive for HPV types targeted by the Cervarix® HPV vaccine (HPV-16 and/or 18), 20.66% (44/213) by Gardasil®4 (HPV-6, -11, -16 and/or -18) and 37.09% (79/213) by Gardasil®9 (HPV-6, -11, -16, -18, -31, -33, -45, -52 and/or -58). HPV-35, commonly detected in cervical cancer cases among women of African ancestry, was frequently detected (9.40%). Participants who reported to have ever consumed alcohol had a significantly higher risk of HPV infection (OR: 2.91, 95% CI: 1.38–6.11, p = 0.005). High HPV prevalence was observed among participants. The high prevalence of HPV types targeted by the Gardasil®9 vaccine encourages the introduction of the Gardasil®9 vaccine. Data from this study will inform both vaccination campaigns and monitor the impact on HPV types after vaccination.

scholarly journals Prevalence of Oral Human Papillomavirus Infection among Indian HIV-positive Men who have Sex with Men: A Cross-Sectional Study

2021 ◽  
Author(s):  
Alexandra Lydia Hernandez ◽  
Rajiv Karthik ◽  
Murugesan Sivasubramanian ◽  
Anantharam Raghavendran ◽  
Shelly Lensing ◽  
...  
Keyword(s):  
Human Papillomavirus ◽  
Hpv Infection ◽  
Sexual History ◽  
Hiv Positive ◽  
Increased Risk ◽  
Oral Hpv ◽  
Hpv Types ◽  
Sex With Men ◽  
The Impact ◽  
Hiv Positive Men

Abstract Background: Oral human papillomavirus (HPV) infection has been causally linked to a subset of oropharyngeal cancers in Western populations15-20, and both oropharyngeal cancer and oral HPV infection are increased among HIV-positive individuals24,41. India has high incidences of oral and oropharyngeal cancers, and Indian HIV-positive men who have sex with men (MSM) may be at increased risk of developing oropharyngeal cancers. However, there is little information available on the prevalence of oral HPV in this population.Methods: We tested 302 HIV-positive Indian MSM for oral HPV infection using L1 HPV DNA PCR with probes specific for 29 types and a mixture of 10 additional types. CD4+ level and plasma HIV viral load (VL) were measured. Participants completed an interviewer-administered questionnaire including a sexual history.Results: The prevalence of oral HPV was 23.7% (95% CI: 19-29%) and 2.4% of participants had oncogenic HPV types. No participants had oral HPV type 16 (HPV-16) and the prevalence of other anogenital HPV types was low. Participants with higher CD4+ levels had reduced odds of having any oral HPV infection (OR: 3.1 [1.4-6.9]) in multivariable analyses. Conclusions: This is the first report of oral HPV among Indian HIV-positive MSM. Our results show a high prevalence of oral HPV infection consistent with studies from Western populations. However, oncogenic anogenital HPV types were relatively uncommon in our study population. It is unknown what the impact of this distribution of oral HPV will be on oropharyngeal cancers. HIV-positive MSM in India should be monitored closely for oral and oropharyngeal pre-cancer and cancer.

scholarly journals Prevalence and Genotype Distribution of Genital Human Papillomavirus Infection in Female Sex Workers in the World: A Systematic Review and Meta-Analysis

2020 ◽  
Author(s):  
Mohammad Farahmand ◽  
Mohsen Moghoofei ◽  
Abolfazl Dorost ◽  
Saeedeh Abbasi ◽  
Seyed Hamidreza Monavari ◽  
...  
Keyword(s):  
Systematic Review ◽  
Human Papillomavirus ◽  
Sex Workers ◽  
Female Sex Workers ◽  
Meta Analysis ◽  
Hpv Infection ◽  
Hpv Prevalence ◽  
High Prevalence ◽  
The World ◽  
Hpv Types

Abstract Background: Female sex workers (FSWs) are amongst the most susceptible groups to acquire human papillomavirus (HPV) infection and consequently, to develop cervical intraepithelial neoplasia and cervical cancer. This is the first systematic review and meta-analysis to provide estimates of the pooled prevalence of HPV infection and the distribution of HPV types among FSWs across the world. Methods: Five computerized databases were searched for relevant studies published since the inception date of databases to September 2019. The pooled HPV prevalence was calculated by the random effect model described by DerSimonian-Laird. Subgroup analysis was performed to identify the probable sources of heterogeneity. The meta-analysis was performed using the “Metaprop” function in the R package Meta. Results: Sixty-two studies involving 21402 FSWs from 33 countries were included in this meta-analysis, and the pooled HPV prevalence was 42.60% (95% confidence interval (CI): 38.58%-46.71%). HPV-16 (10.16%, 95% CI: 8.20%–12.51%), HPV-52 (7.98%, 95% CI: 5.91%–10.70%), and HPV-53 (6.01%, 95% CI: 4.40%–8.15%) were the most common high-risk HPV types identified among FSWs. The pooled estimated prevalence of HPV infection among FSWs before and after 2010 were slightly different, 43.64% (95% CI: 36.12%-51.46%) and 41.97% (95% CI: 37.28%-46.81%), respectively. Conclusion: Due to the high prevalence of HPV infection, particularly with high-risk types, FSWs have a great susceptibility to the development of cervical and vaginal cancers. Furthermore, they can transmit their infection to their clients, which may result in a high prevalence of HPV and the incidence of HPV-associated malignancies among the general population.

scholarly journals 433. Implementation of an Emergency Department Syphilis Screening Program

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S216-S216
Author(s):  
Tasleem Chechi ◽  
Allyson C Sage ◽  
Nam Tran ◽  
Sarah Waldman ◽  
Larissa S May
Keyword(s):  
Best Practice ◽  
Congenital Syphilis ◽  
Screening Program ◽  
Turnaround Time ◽  
Transmitted Infection ◽  
Sexually Transmitted ◽  
Sti Testing ◽  
Increased Risk ◽  
High Prevalence ◽  
Syphilis Screening

Abstract Background Syphilis incidence across all regions of California increased by 22% compared with 2016 cases; with the largest number of chlamydia, gonorrhea, syphilis, and congenital syphilis cases among all states (CDC 2017). The USPSTF recommends targeted syphilis screening in patients at increased risk. However, in emergency departments (EDs) targeted syphilis screening is not routinely performed even when patients present for concerns of a sexually transmitted infection (STI). The purpose of this program was to implement routine syphilis screening among ED patients being tested for chlamydia and gonorrhea (CT/GC) through the use of an EHR enhancement to maximize the number of new syphilis diagnoses. Methods From November 27, 2018 to March 31, 2019, EHR-based syphilis screening was implemented in a quaternary care ED in Northern California serving urban and rural populations. EMR best practice alerts (BPA) were developed and populated on patients receiving STI testing. Syphilis testing employed a reverse sequence algorithm, which is suggested for high prevalence settings and provides rapid turnaround time. Patients were excluded if they opted out from testing. We determined the proportion of all CT/GC tested patients who underwent syphilis screening and the prevalence of syphilis among this group. Results During a four-month period, 649 ED patients with suspected STI received a BPA to screen for syphilis. Of those, 425 patients (65.5%) were screened for syphilis, 22 had a reactive IgG/IgM and RPR, while 5 patients had a reactive IgG/IgM and a nonreactive RPR which required a TPPA test to detect their infection. Fourteen of the 22 patients with a reactive RPR had titers of 1:32 or higher. Nine (32%) of those with a positive CT/GC test tested positive for syphilis. Conclusion Implementation of a syphilis screening program in patients undergoing testing for other STIs yielded 28 new diagnoses compared with those tested prior to the screening in 2018. Introducing an automated EMR-based syphilis screening program is an effective method to maximize syphilis screening in all ED patients seeking treatment for STIs. The screening data suggest that the majority of patients undergoing STI testing in our ED are not screened for syphilis, yet the prevalence of infection in those screened is substantial. Disclosures All authors: No reported disclosures.

Sign in / Sign up

Export Citation Format

Share Document