Showing posts with label Anal HPV. Show all posts
Showing posts with label Anal HPV. Show all posts

Saturday, March 26, 2016

Incidence, Duration, Persistence & Factors Associated with High-Risk Anal HPV Persistence among HIV-Negative Men Having Sex with Men

BACKGROUND:
Given high rates of anal disease, we investigated the natural history of high-risk anal HPV among a multi-national group of men having sex with men (MSM) aged 18-64 years.

METHODS:
Anal specimens from HIV-negative men from Brazil, Mexico, and the USA were genotyped. Over 2 years, 406 MSM provided evaluable specimens every six months for ≥2 visits. These men were stratified into men having sex only with men (MSOM, n=70) and men having sex with women and men (MSWM, n=336). Persistence was defined as ≥12-months type-specific duration and could begin with either a prevalent or incident infection. Prevalence ratios and 95% confidence intervals were calculated by Poisson regression.

RESULTS:
Median follow-up time was 2.1 years. Retention was 82%. Annual cumulative incidence of 9-valent vaccine types was 19% and 8% among MSOM and MSWM, respectively (log rank p-value 0.02). Duration of anal HPV did not differ for MSOM and MSWM and was a median of 6.9 months for HPV-16 after combining men from the two groups. Among men with prevalent high-risk infection (n=106), a total of 36.8%, retained the infection for at least 24 months. For those with prevalent HPV-16 (n=27), 29.6% were persistent for at least 24 months. Persistence of high-risk HPV was associated with number of male anal sex partners and inversely associated with number of female sex partners.

CONCLUSIONS:
MSM with prevalent high-risk HPV infection should be considered at increased risk for non-transient infection.

Purchase full article at:   http://goo.gl/B9jEDS

  • 1Center for Infectious Diseases, University of Texas School of Public Health at Houston, Houston, TX, USA.
  • 2Centro de Referência e Treinamento em DST/AIDS São Paulo, Brazil.
  • 3Division of Biostatistics, University of Texas School of Public Health at Houston, Houston, TX, USA.
  • 4Center of Translational Oncology, Instituto do Câncer do Estado de São Paulo - ICESP, São Paulo, Brazil.
  • 5Vanderbilt Institute for Global Health, Nashville, TN, USA.
  • 6Center for Infection Research in Cancer, Moffitt Cancer Center, MRC-CANCONT, Tampa, FL, USA.
  • 7Biostatistics, School of Public Health, Louisiana State University Health Sciences Center, New Orleans, LA, USA.
  • 8Instituto Nacional de Salud Pública, Cuernavaca, Mexico and Instituto Mexicano del Seguro Social, Cuernavaca, Mexico.
  • 9Instituto Nacional de Salud Pública, Cuernavaca, México.
  • 10Faculdade de Medicina, Universidade de São Paulo Department of Radiology and Oncology, Centro de Investigação Translacional em Oncologia - ICESP, São Paulo, SP, Brazil.
  • 11Center for Infection Research in Cancer, Moffitt Cancer Center, Tampa, FL, USA.
  •  2016 Mar 8. pii: ciw140.  



Friday, March 18, 2016

Prevalence of Anal High-Risk Human Papillomavirus Infections among HIV-Positive and HIV-Negative Men Who Have Sex with Men in Nigeria

BACKGROUND:
Prevalence estimates of anal high-risk human papillomavirus (HR-HPV) are needed in sub-Saharan Africa where HIV is endemic. This study evaluated anal HR-HPV in Nigeria among HIV-positive and HIV-negative men who have sex with men (MSM) for future immunization recommendations.

METHODS:
We conducted a cross-sectional study to compare the prevalence of anal HR-HPV infections between 64 HIV-negative and 90 HIV-positive MSM. Multivariate Poisson regression analyses were used to examine demographic and behavioral risk factors associated with any HR-HPV infections.

RESULTS:
The median age of the 154 participants was 25 years (interquartile range, 22-28 years; range, 16-38 years), and the median age at initiation of anal sex with another man was 16 years (interquartile range, 13-18 years; range, 7-29 years). The prevalence of anal HR-HPV was higher among HIV-positive than HIV-negative MSM (91.1% vs. 40.6%, P < 0.001). In the multivariate analysis, HIV infection (adjusted prevalence ratio [aPR], 2.02; 95% confidence interval [CI], 1.49-2.72), 10 years or more since anal sexual debut (aPR, 1.26; 95% CI, 1.07-1.49), and concurrent relationships with men (aPR, 1.32; 95% CI, 1.04-1.67) were associated with increased anal HR-HPV prevalence.

CONCLUSIONS:
Anal HR-HPV infection is high for young Nigerian MSM, and rates are amplified in those coinfected with HIV. Providing universal coverage as well as catch-up immunization for young MSM may be an effective anal cancer prevention strategy in Nigeria.

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  • 1From the *Institute of Human Virology and †Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD; ‡University of New Mexico Health Sciences Center, Albuquerque, NM; §University of Maryland School of Public Health, College Park, MD; Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; and ∥Institute of Human Virology Nigeria, Federal Capital Territory, Nigeria. 
  •  2016 Apr;43(4):243-8. doi: 10.1097/OLQ.0000000000000431.



Friday, March 11, 2016

Increasing Incidence of Anogenital Warts with an Urban–Rural Divide among Males in Manitoba, Canada, 1990–2011

Background
Anogenital warts (AGW) are caused by the most common sexually transmitted infection, human papillomavirus. The objective of this study was to examine AGW incidence from 1990 to 2011 by sex, age, income quintile, and residential area category (urban/rural). The study period included the initiation of school-based HPV vaccination for girls in the sixth grade, which began in 2008. The data presented in this paper may also be useful for establishing baseline rates of AGW incidence which may be used to evaluate the success of the school-based HPV immunization program.

Methods
Cases of anogenital warts were identified using Manitoba’s administrative databases of Physician Claims and Hospital Discharge Abstracts. Annual age-standardized incidence in Manitoba from 1990 to 2011 was calculated. Incident AGW rates were compared by sex, age group, residential area category (urban/rural), and household income quintile using logistic regression. Joinpoint regression analyses were used to evaluate the time trends of AGW.

Results
Prior to 2000, AGW incidence was higher among females than males. However, from 2000 to 2011 the incidence was higher among males and increased steadily over time. AGW incidence tended to peak in younger age groups among females compared to males. Females and males living in urban areas had nearly twice the odds of AGW occurrence compared to those in rural areas.

Conclusions
There is a need for education about AGW in male population. The upcoming initiation of HPV vaccination among boys may reduce the incidence and should be evaluated.

Below: Age-Standardized Incidence (per 100,000 persons) of AGW in Manitoba, 1990 – 2011



Below:  Sex Stratified Age-Specific 5-year Average AGW Incidence (per 100,000 persons) in Manitoba, 1990 – 2011



Below:  The Trends of Age-Standardized Incidence (per 100,000 persons) of AGW by Sex and Geographic Residential Area in Manitoba, 1990 - 2011



Full article at:   http://goo.gl/keXH9u

Epidemiology and Surveillance Unit, Public Health and Primary Health Care Division, Manitoba Health, Healthy Living & Seniors, Winnipeg, R3B 3 M9 Manitoba Canada
Centre for Global Public Health, University of Manitoba, Winnipeg, Canada
Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada
Bo Nancy Yu,  ac.abotinamu@uy.ycnan.
*Corresponding author.




Sunday, March 6, 2016

Anal HPV/HIV Co-Infection among Men Who Have Sex with Men: A Cross-Sectional Survey from Three Cities in China

Anal human papillomavirus (HPV) infection, which is linked to anal warts and anal cancer, is common among men who have sex with men (MSM), especially among those HIV positives. MSM aged 18 years or older were recruited from mainland China. 

Blood and anal cytologic samples were collected for HIV-1 serological test and HPV genotyping. A total of 889 eligible participations were included. The genotyping results of HPV were available for 822 participants (92.46%), 65.32% of which were positive for the targeted 37 HPV types. Prevalence of infection with any type of HPV was higher among HIV-infected participants (82.69%) as compared to HIV-uninfected participants (62.81%) (p < 0.01). HPV06 (15.45%), HPV18(13.50%), HPV16 (11.44%), and HPV11 (10.71%) were the most frequent types identified in the study population. 

Ever had paid sex with man was found to be independent predictor for HPV positivity with an adjusted odds ratios (OR) of 2.34 (1.16-4.74). Anal HPV positivity was observed to be independently associated with HIV infection with an adjusted OR of 3.03 (1.76-5.21) in the study population. 

In conclusion, the prevalence of anal HPV infection was observed to be common among MSM from mainland China, and it was significantly associated with the status of HIV infection.

Full article at:   http://goo.gl/ntEi0N

By:  Li X1Li M1Yang Y2Zhong X3Feng B1Xin H1Li Z1Jin Q1Gao L1.
  • 1MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences &Peking Union Medical College, Beijing, China.
  • 2Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, Beijing, China.
  • 3MSD China Holding Co., Ltd, Beijing, China.
  •  2016 Feb 19;6:21368. doi: 10.1038/srep21368. 



Tuesday, March 1, 2016

Anal HPV/HIV Co-Infection among Men Who Have Sex with Men: A Cross-Sectional Survey from Three Cities in China

Anal human papillomavirus (HPV) infection, which is linked to anal warts and anal cancer, is common among men who have sex with men (MSM), especially among those HIV positives. MSM aged 18 years or older were recruited from mainland China. 

Blood and anal cytologic samples were collected for HIV-1 serological test and HPV genotyping. A total of 889 eligible participations were included. The genotyping results of HPV were available for 822 participants (92.46%), 65.32% of which were positive for the targeted 37 HPV types. 

Prevalence of infection with any type of HPV was higher among HIV-infected participants (82.69%) as compared to HIV-uninfected participants (62.81%) (p < 0.01). HPV06 (15.45%), HPV18(13.50%), HPV16 (11.44%), and HPV11 (10.71%) were the most frequent types identified in the study population. Ever had paid sex with man was found to be independent predictor for HPV positivity with an adjusted odds ratios (OR) of 2.34 (1.16–4.74). Anal HPV positivity was observed to be independently associated with HIV infection with an adjusted OR of 3.03 (1.76–5.21) in the study population. 

In conclusion, the prevalence of anal HPV infection was observed to be common among MSM from mainland China, and it was significantly associated with the status of HIV infection.

Full article at:   http://goo.gl/h1a73Q

By:  Xiangwei Li,1,* Mufei Li,1,* Yu Yang,2 Xiang Zhong,3 Boxuan Feng,1 Henan Xin,1 Zhen Li,1 Qi Jin,a,1 and Lei Gaob,1
1MOH Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
2Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, Beijing, China
3MSD China Holding Co., Ltd, Beijing, China
*These authors contributed equally to this work.




Saturday, February 6, 2016

Anal Cancer & Intraepithelial Neoplasia Screening: A Review

This review focuses on the early diagnosis of anal cancer and its precursor lesions through routine screening. A number of risk-stratification strategies as well as screening techniques have been suggested, and currently little consensus exists among national societies. Much of the current clinical rationale for the prevention of anal cancer derives from the similar tumor biology of cervical cancer and the successful use of routine screening to identify cervical cancer and its precursors early in the disease process. It is thought that such a strategy of identifying early anal intraepithelial neoplasia will reduce the incidence of invasive anal cancer. The low prevalence of anal cancer in the general population prevents the use of routine screening. However, routine screening of selected populations has been shown to be a more promising strategy. Potential screening modalities include digital anorectal exam, anal Papanicolaou testing, human papilloma virus co-testing, and high-resolution anoscopy. Additional research associating high-grade dysplasia treatment with anal cancer prevention as well as direct comparisons of screening regimens is necessary to develop further anal cancer screening recommendations.

…[T]here are populations with disproportionate prevalence of anal cancer that are more conducive to group-wide screening. Immunosuppressed patients are increasingly recognized as one of the groups at highest risk for anal cancer[,]. Much of this recognition has developed over the rise of the HIV/AIDS epidemic in the last three decades. Infection with HIV is associated with a 30-fold increased lifetime risk in anal cancer and a 4-fold increase in 5-year mortality[,]. Although sexual practices - particularly anoreceptive intercourse - have been previously associated with anal cancer, recent studies have shown that the risk of anal cancer in HIV-positive individuals exists independently of sexual practices[,]. The risk of anal dysplasia progression appears to correlate directly with degree of immunosuppression as measured by T cell CD4+ count with a cell count less than 200 cells/mm3 most closely associated with increased prevalence[-]. Surprisingly though increased access to highly active antiretroviral therapies has not eliminated the increased risk of anal cancer in the HIV-infected population. It is thought that immune system restoration does not entirely eliminate the increased risk of dysplastic changes and then antiretroviral treated patients are living longer thereby increasing the lifetime interval risk of disease incidence[]...

Below:  San Francisco algorithm for anal cancer screening of high-risk patients. ASC-US: Atypical squamous cells of undetermined significance; LSIL: Low-grade squamous intraepithelial lesions; HSIL: High-grade squamous intraepithelial lesions; Pap: Papanicolaou; HRA: High-resolution anoscopy; AIN: Anal intraepithelial neoplasia



Below:  Johns Hopkins Hospital algorithm for anal cancer screening of high-risk patients. Pap: Papanicolaou; HRA: High-resolution anoscopy; ASC-H: Atypical squamous cells of undetermined significance, cannot rule-out high-grade dysplasia; AIN I: Anal intraepithelial neoplasia I; PCP: Primary care physician; LSIL: Low-grade squamous intraepithelial lesion; AIN II: Anal intraepithelial neoplasia II; AIN III: Anal intraepithelial neoplasia III.



Full article at:  http://goo.gl/Oo7oeU

Ira L Leeds, Sandy H Fang, Ravitch Division, Colon and Rectal Surgery, Department of Surgery, Johns Hopkins Hospital, Baltimore, MD 21287, United States
Author contributions: Leeds IL and Fang SH contributed to conception and design; Leeds IL contributed to data collection and analysis, and drafting manuscript; Fang SH contributed to critical revision.
Correspondence to: Ira L Leeds, MD, MBA, Ravitch Division, Colon and Rectal Surgery, Department of Surgery, Johns Hopkins Hospital, 600 N Wolfe Street, Tower 110, Baltimore, MD 21287, United States. ude.imhj@sdeeli





Friday, January 1, 2016

Incidence, Trends and Ethnic Differences of Oropharyngeal, Anal and Cervical Cancers: Singapore, 1968-2012

In recent decades, several Western countries have reported an increase in oropharyngeal and anal cancers caused by human papillomavirus (HPV). Trends in HPV-associated cancers in Asia have not been as well described. 

We describe the epidemiology of potentially HPV-related cancers reported to the Singapore Cancer Registry from 1968–2012. Analysis included 998 oropharyngeal squamous cell carcinoma (OPSCC), 183 anal squamous cell carcinoma (ASCC) and 8,019 invasive cervical cancer (ICC) cases. Additionally, 368 anal non-squamous cell carcinoma (ANSCC) and 2,018 non-oropharyngeal head and neck carcinoma (non-OP HNC) cases were included as comparators. 

Age-standardized incidence rates (ASR) were determined by gender and ethnicity (Chinese, Malay and Indian). Joinpoint regression was used to evaluate annual percentage change (APC) in incidence. OPSCC incidence increased in both genders (men 1993–2012, APC = 1.9%, p<0.001; women 1968–2012, APC = 2.0%, p = 0.01) and was 5 times higher in men than women. In contrast, non-OP HNC incidence declined between 1968–2012 among men (APC = -1.6%, p<0.001) and women (APC = -0.4%, p = 0.06). ASCC and ANSCC were rare (ASR = 0.2 and 0.7 per 100,000 person-years, respectively) and did not change significantly over time except for increasing ANSCCs in men (APC = 2.8%, p<0.001). ICC was the most common HPV-associated cancer (ASR = 19.9 per 100,000 person-years) but declined significantly between 1968–2012 (APC = -2.4%). Incidence of each cancer varied across ethnicities. 

Similar to trends in Western countries, OPSCC incidence increased in recent years, while non-OP HNC decreased. ICC remains the most common HPV-related cancer in Singapore, but Pap screening programs have led to consistently decreasing incidence.

Below:  Incidence of oropharyngeal and non-oropharyngeal head and neck squamous cell carcinomas in Singapore 1968–2012, by gender



Below:  Incidence of invasive anal cancer in Singapore, 1968–2012, by gender and histology



Below:  Incidence of invasive cervical cancer in Singapore, 1968–2012, by ethnicity



Full article at:   http://goo.gl/d8E8Xy

By:   
Jennifer O. Lam, Gypsyamber D’Souza
Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America

Wei-Yen Lim
Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore

Khuan-Yew Chow
National Registry of Diseases Office, Singapore, Singapore


Thursday, December 31, 2015

Prevalence of & Risk Factors for Anal Oncogenic Human Papillomavirus Infection among HIV-Infected Women in France in the cART Era

BACKGROUND:
Little is known about the type-specific prevalence of anal human papillomavirus (HPV) infection and risk factors for anal high-risk (HR) HPV infection in HIV-infected women.

METHODS:
A cross-sectional study of anal and cervical HPV infection was nested within a gynaecological cohort of HIV-infected women. Specimens were tested for type-specific DNA using Linear Array.

RESULTS:
The study population consisted of 311 women with a median age of 45.3 years, of whom 42.8% originated from sub-Saharan Africa and 96.8% were receiving combination antiretroviral therapy. The median CD4 cell count was 612/mm3 and HIV load was below 50 copies/mL in 84.1%. HR-HPV types were detected in the anal canal in 148 (47.6%) and in the cervix in 82 (26.4%) women. HPV16 was the most prevalent type in both the anal canal (13.2% of women) and the cervix (5.1%). In multivariable analysis, factors associated with prevalent anal HR-HPV infection were CD4 count below 350/mm3 (OR, 2.9;95%CI:1.3-6.5), concurrent cervical lesions (OR, 2.6;95%CI:1.0-4.3), and cervical HR-HPV infection (OR, 1.8;95%CI: 1.0-3.2).

CONCLUSION:
The high prevalence of high-risk HPV types, including HPV16, in the anal canal of HIV-positive women is concerning. Anal cancer screening should be considered for HIV-positive women as part of their routine care.

Purchase full article at:   http://goo.gl/zcyo0W

  • 1French Human papillomavirus Reference Laboratory, Institut Pasteur, Paris, France Department of Endocrinology and Reproductive Medicine, IE3M, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique, Hôpitaux de Paris (AP-HP), Paris, France.
  • 2Aix Marseille Univ, Sainte-Marguerite Hospital, Immuno-hematology Clinic Unit, Assistance Publique, Hôpitaux de Marseille, Marseille, France Inserm U912, Marseille, France.
  • 3Sorbonne Universités, UPMC Univ Paris 06,INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (IPLESP UMRS 1136) F75013, Paris, France INSERM Transfert, Paris, France.
  • 4Proctologie unit, Groupe Hospitalier Diaconesses-Croix Saint-Simon, Paris, France.
  • 5Assistance Publique, Hôpitaux de Paris (AP-HP), HUPNVS, Hôpital Mourier, Colombes, France.
  • 6Scottish HPV Reference Laboratory, Edinburgh, UK.
  • 7Department of Endocrinology and Reproductive Medicine, IE3M, Groupe Hospitalier Pitié-Salpêtrière, Assistance Publique, Hôpitaux de Paris (AP-HP), Paris, France.
  • 8Sorbonne Universités, UPMC Univ Paris 06,INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique (IPLESP UMRS 1136) F75013, Paris, France. 


Sunday, December 6, 2015

Incidence & Clearance of Anal High-Risk Human Papillomavirus in HIV-Positive Men Who Have Sex with Men

Background: To estimate incidence and clearance of high-risk human papillomavirus (HR-HPV), and their risk factors, in men who have sex with men (MSM) recently infected by HIV in Spain; 2007–2013.

Methods: Multicenter cohort. HR-HPV infection was determined and genotyped with linear array. Two-state Markov models and Poisson regression were used.

Results: We analysed 1570 HR-HPV measurements of 612 MSM over 13 608 person-months (p-m) of follow-up. Median (mean) number of measurements was 2 (2.6), median time interval between measurements was 1.1 years (interquartile range: 0.89–1.4). Incidence ranged from 9.0 [95% confidence interval (CI) 6.8–11.8] per 1000 p-m for HPV59 to 15.9 (11.7–21.8) per 1000 p-m for HPV51. HPV16 and HPV18 had slightly above average incidence: 11.9/1000 p-m and 12.8/1000 p-m. HPV16 showed the lowest clearance for both ‘prevalent positive’ (15.7/1000 p-m; 95% CI 12.0–20.5) and ‘incident positive’ infections (22.1/1000 p-m; 95% CI 11.8–41.1). More sexual partners increased HR-HPV incidence, although it was not statistically significant. Age had a strong effect on clearance (P-value < 0.001) due to the elevated rate in MSM under age 25; the effect of HIV-RNA viral load was more gradual, with clearance rate decreasing at higher HIV-RNA viral load (P-value 0.008).

Conclusion: No large variation in incidence by HR-HPV type was seen. The most common incident types were HPV51, HPV52, HPV31, HPV18 and HPV16. No major variation in clearance by type was observed, with the exception of HPV16 which had the highest persistence and potentially, the strongest oncogenic capacity. Those aged below 25 or with low HIV-RNA- viral load had the highest clearance.

Below:  In the combined analysis, none of the variables had a statistically significant effect on HR-HPV incidence; P-values for the effect of age, CD4+ cell count and HIV-RNA viral load were 0.17, 0.49 and 0.55, respectively



Full article at:  http://goo.gl/yf2DCI

By:  Geskus, Ronald B.a,b,*; González, Cristinac,d,*; Torres, Montserrate; Del Romero, Jorgef; Viciana, Pompeyog; Masiá, Marh; Blanco, José R.i; Iribarren, Mauricioj; De Sanjosé, Silviad,k; Hernández-Novoa, Beatrizl; Ortiz, Martae,†; Del Amo, Juliac,d,†; CoRIS-HPV Study Group
aPublic Health Service of Amsterdam
bAcademic Medical Center, Amsterdam, The Netherlands
cNational Center of Epidemiology, Institute of Health Carlos III, Madrid
dCIBERESP
eNational Center of Microbiology, Institute of Health Carlos III. Madrid
fSanitary Center Sandoval, Madrid
gVirgen del Rocío University Hospital, Sevilla
hElche University Hospital, Alicante
iSan Pedro –CIBIR Hospital, Logroño, La Rioja
jXeral de Vigo University Hospital, Vigo
kCatalan Institute of Oncology, Barcelona
lRamón y Cajal University Hospital-IRYCIS, Madrid, Spain.
*Ronald B. Geskus and Cristina González contributed equally to the writing of this manuscript.
Marta Ortiz and Julia Del Amo are senior authors and have equally contributed to this manuscript.
Correspondence to Julia del Amo, National Center of Epidemiology, Institute of Health Carlos III, Av. Monforte de Lemos no 5, CP: 28029 Madrid, Spain. Tel: +34 91 822 21 42; fax: +34 91 387 75 13; e-mail: jdamo@isciii.es
Received 14 January, 2014
Revised 27 June, 2014
Accepted 2 July, 2014
Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's Website (http://www.AIDSonline.com).