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1.
Trop Med Int Health ; 28(3): 237-246, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36717965

RESUMEN

OBJECTIVES: This cross-sectional survey aimed to explore associations between age of menarche, early sexual debut and high-risk sexual behaviour among urban Tanzanian schoolgirls. METHODS: Secondary schoolgirls aged 17-18 years from Mwanza, Tanzania, participated in structured face-to-face questionnaire-based interviews, conducted by nurses and clinicians. Age of menarche was evaluated in categories of 11-12, 13-14, 15-16 or ≥17 years. Primary outcome measures were self-reported early sexual debut (first vaginal sex at <16 years) and high-risk sexual behaviour, including non-use of condoms, having sex for gifts/money, having older sexual partners and/or other risky behaviours. RESULTS: Of 401 girls enrolled, 174 (43.4%) reported prior vaginal sex. Prevalence of early sexual debut was 14.2% but pressured/forced sex and risky sexual behaviours were common. Adjusted for potential confounding, younger age at menarche was associated with early sexual debut (adjusted odds ratio for linear trend: 1.88 per category, 95% confidence interval: 1.21-2.92, p = 0.005). This association remained after excluding girls with first sex at <8 years or experiencing pressure or force at first sex. Further, adjusted for potential confounding (including ever experiencing forced sex), early sexual debut was associated with high-risk sexual behaviour (adjusted odds ratio: 2.85, 95% confidence interval: 1.38-5.88, p = 0.004). CONCLUSIONS: Among urban Tanzanian school girls, younger age of menarche was associated with early sexual debut, and early sexual debut was associated with high-risk sexual behaviour. Researchers and public health professionals developing and delivering interventions aimed at preventing adverse sexual health outcomes should consider the impact of these early biological and sexual exposures.


Asunto(s)
Menarquia , Conducta Sexual , Femenino , Humanos , Estudios Transversales , Tanzanía/epidemiología , Parejas Sexuales
2.
Sex Transm Infect ; 96(3): 211-219, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-31221744

RESUMEN

OBJECTIVES: Cervical cancer is the leading cause of cancer-related mortality among women in sub-Saharan Africa (SSA). Data on human papillomavirus (HPV) epidemiology in adolescent girls in SSA are essential to inform HPV vaccine policy recommendations for cervical cancer prevention. We assessed the burden of HPV infection, and risk factors for infection, among adolescent girls around the time of sexual debut. METHODS: Cross-sectional study of secondary school girls aged 17-18 years in Tanzania. Consenting participants provided samples for HPV and STI testing. Vaginal swabs were tested for 37 HPV genotypes by Roche Linear Array. Logistic regression was used to identify factors associated with HPV infection. Y chromosome was tested as a marker of recent condomless sex. RESULTS: 163/385 girls (42.3%) reported previous penetrative sex. HPV was detected in 125/385 (32.5%) girls, including 84/163 (51.5%) girls reporting previous sex and 41/222 (18.5%) reporting no previous sex. High-risk (HR) genotypes were detected in 70/125 (56.0%) girls with HPV infection. The most common HR genotype was HPV-16 (15/385; 3.9%). The prevalence of other HR HPV vaccine genotypes was between 0.8% and 3.1%. Among 186 girls who reported no previous sex, were negative for Y chromosome, and had no STI, 32 (17%) had detectable HPV. Lactobacillus sp and bacterial vaginosis-associated bacteria were negatively and positively associated, respectively, with HPV. CONCLUSIONS: HPV prevalence among adolescent girls around the time of sexual debut was high. However, prevalence of most vaccine genotypes was low, indicating that extending the age range of HPV vaccination in this region may be cost-effective.


Asunto(s)
Genotipo , Papillomaviridae/clasificación , Papillomaviridae/aislamiento & purificación , Infecciones por Papillomavirus/epidemiología , Adolescente , Estudios Transversales , Femenino , Humanos , Papillomaviridae/genética , Prevalencia , Factores de Riesgo , Tanzanía/epidemiología , Factores de Tiempo
3.
Emerg Infect Dis ; 25(7)2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-31211938

RESUMEN

Traditional public health methods for detecting infectious disease transmission, such as contact tracing and molecular epidemiology, are time-consuming and costly. Information and communication technologies, such as global positioning systems, smartphones, and mobile phones, offer opportunities for novel approaches to identifying transmission hotspots. However, mapping the movements of potentially infected persons comes with ethical challenges. During an interdisciplinary meeting of researchers, ethicists, data security specialists, information and communication technology experts, epidemiologists, microbiologists, and others, we arrived at suggestions to mitigate the ethical concerns of movement mapping. These suggestions include a template Data Protection Impact Assessment that follows European Union General Data Protection Regulations.


Asunto(s)
Enfermedades Transmisibles/epidemiología , Enfermedades Transmisibles/transmisión , Ética Médica , Vigilancia en Salud Pública , Vigilancia de Guardia , Teléfono Celular , Análisis Costo-Beneficio , Brotes de Enfermedades , Sistemas de Información Geográfica , Humanos , Consentimiento Informado , Vigilancia de la Población , Privacidad , Vigilancia en Salud Pública/métodos , Medición de Riesgo
4.
Sex Transm Infect ; 95(3): 219-227, 2019 05.
Artículo en Inglés | MEDLINE | ID: mdl-30518620

RESUMEN

OBJECTIVES: Bacterial vaginosis (BV) increases women's susceptibility to sexually transmitted infections (STIs) and HIV and may partly explain the high incidence of STI/HIV among girls and young women in East and southern Africa. The objectives of this study were to investigate the association between BV and sexual debut, to investigate other potential risk factors of BV and to estimate associations between BV and STIs. METHODS: Secondary school girls in Mwanza, aged 17 and 18 years, were invited to join a cross-sectional study. Consenting participants were interviewed and samples were obtained for STI and BV testing. Factors associated with prevalent BV were analysed using multivariable logistic regression. Y-chromosome was tested as a biomarker for unprotected penile-vaginal sex. RESULTS: Of the 386 girls who were enrolled, 163 (42%) reported having ever had penile-vaginal sex. Ninety-five (25%) girls had BV. The prevalence of BV was 33% and 19% among girls who reported or did not report having ever had penile-vaginal sex, respectively. BV was weakly associated with having ever had one sex partner (adjusted odds ratio (aOR) 1.59;95% CI 0.93 to 2.71) and strongly associated with two or more partners (aOR = 3.67; 95% CI 1.75 to 7.72), receptive oral sex (aOR 6.38; 95% CI 1.22 to 33.4) and having prevalent human papillomavirus infection (aOR = 1.73; 95% CI 1.02 to 2.95). Of the 223 girls who reported no penile-vaginal sex, 12 (5%) tested positive for an STI and 7 (3%) tested positive for Y-chromosome. Reclassifying these positive participants as having ever had sex did not change the key results. CONCLUSIONS: Tanzanian girls attending school had a high prevalence of BV. Increasing number of sex partner was associated with BV; however, 19% of girls who reported no penile-vaginal sex had BV. This suggests that penile-vaginal sexual exposure may not be a prerequisite for BV. There was evidence of under-reporting of sexual debut.


Asunto(s)
Infecciones por Papillomavirus/epidemiología , Conducta Sexual , Estudiantes , Vaginosis Bacteriana/epidemiología , Adolescente , Estudios Transversales , Femenino , Humanos , Incidencia , Infecciones por Papillomavirus/etiología , Prevalencia , Salud Reproductiva , Factores de Riesgo , Tanzanía/epidemiología , Vaginosis Bacteriana/etiología
5.
AIDS Behav ; 23(6): 1375-1386, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30406334

RESUMEN

About 2.1 million adolescents aged 10-19 years are living with HIV, 80% of them in sub-Saharan Africa. Early sexual activity remains an important risk factor for HIV transmission and potentially result in negative health consequences including onward transmission of sexually transmitted infections. Cross-sectional data of 580 adolescents living with HIV (ALHIV) aged 13-17 years (317 girls and 263 boys) from Kenya and Uganda were analyzed to assess factors associated with risk to become sexually active. Factors associated with risk of sexual intercourse were identified using Kaplan-Meier survival curves and Cox regression with gender-stratified bi-and multivariable models. Slightly more females (22%) than males (20%) reported they have had sex. Multivariable models showed that being aware of one's own HIV infection, and receiving antiretroviral treatment were negatively associated with risk of becoming sexually active, while subjective norms conducive to sexuality, and girls' poor health experience increased the risk. In the final multi-variable models, schooling was protective for girls, but not for boys. Being more popular with the opposite sex was negatively associated with the outcome variable only for girls, but not for boys. This study expands the knowledge base on factors associated with onset of sexual activity among ALHIV, potentially informing positive prevention interventions.


Asunto(s)
Infecciones por VIH/transmisión , Conducta Sexual/estadística & datos numéricos , Adolescente , Conducta del Adolescente , Adulto , África Oriental/epidemiología , Niño , Estudios Transversales , Femenino , Infecciones por VIH/psicología , Humanos , Masculino , Factores de Riesgo , Conducta Sexual/psicología , Adulto Joven
6.
BMC Public Health ; 18(1): 162, 2018 01 19.
Artículo en Inglés | MEDLINE | ID: mdl-29351785

RESUMEN

BACKGROUND: HIV disclosure is an important step in delivering the right care to people. However, many people with an HIV positive status choose not to disclose. This considerably complicates the delivery of adequate health care. METHODS: We conducted a grounded theory study to develop a theoretical model explaining how local contexts impact on HIV disclosure and what the mechanisms are that determine whether people choose to disclose or not. We conducted in-depth interviews among 23 people living with HIV, 8 health workers and 5 family and community members, and 1 community development worker in Achham, Nepal. Data were analysed using constant-comparative method, performing three levels of open, axial, and selective coding. RESULTS: Our theoretical model illustrates how two dominant systems to control HIV, namely a community self-coping and a public health system, independently or jointly, shape contexts, mechanisms and outcomes for HIV disclosure. CONCLUSION: This theoretical model can be used in understanding processes of HIV disclosure in a community where HIV is concentrated in vulnerable populations and is highly stigmatized, and in determining how public health approaches would lead to reduced stigma levels and increased HIV disclosure rates.


Asunto(s)
Teoría Fundamentada , Infecciones por VIH/psicología , Revelación de la Verdad , Poblaciones Vulnerables/psicología , Adaptación Psicológica , Adulto , Femenino , Humanos , Masculino , Modelos Teóricos , Nepal , Estigma Social , Poblaciones Vulnerables/estadística & datos numéricos
7.
BMC Public Health ; 18(1): 1277, 2018 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-30453923

RESUMEN

BACKGROUND: This realist review was conducted to understand how stigma is reduced in relation to HIV test uptake in low- and middle-income countries (LMICs). METHODS: A systematic search of eight databases resulted in 34 articles considered for synthesis. Data synthesis was guided by a preliminary programme theory and included coding the meaning units to develop themes or intervention pathways that corresponded to context-mechanism-outcome configurations. RESULTS: We found that the interventions produced an effect through two pathways: (a) knowledge leads to changes in stigmatizing attitudes and increases in HIV test uptake and (b) knowledge and attitudes lead to changes in stigmatizing behaviours and lead to HIV test uptake. We also found one competing pathway that illustrated the direct impact of knowledge on HIV test uptake without changing stigmatizing attitudes and behaviour. The identified pathways were found to be influenced by some structural factors (e.g., anti-homosexuality laws, country-specific HIV testing programmes and policies), community factors (e.g., traditional beliefs and practices, sexual taboos and prevalence of intimate partner violence) and target-population characteristics (e.g., age, income and urban-rural residence). CONCLUSIONS: The pathways and underlying mechanisms support the adaptation of intervention strategies in terms of social context and the target population in LMICs.


Asunto(s)
Países en Desarrollo , Infecciones por VIH/psicología , Tamizaje Masivo/psicología , Estigma Social , Infecciones por VIH/diagnóstico , Humanos , Tamizaje Masivo/estadística & datos numéricos , Ensayos Clínicos Controlados Aleatorios como Asunto
8.
Health Care Women Int ; 39(4): 450-462, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29210616

RESUMEN

HPV vaccine is effective in preventing human papillomavirus, the main cause of cervical cancer. In Vietnam, at first, it was subsidized at $5 a dose and reached the coverage of 96% in two pilot provinces, indicating potentially high acceptance. Currently, it is provided at $120-195 for three doses. This is a cross-sectional study, conducted in two northern rural districts of Vietnam. Researchers present findings to show 53.1% of mothers stated their willingness to pay (WTP) for HPV vaccine for their daughters. Perceptions on cost and condom use were associated with WTP. Mothers' affordability ranged from under $23 to $46. Measures should be implemented soon to make HPV vaccine more affordable.


Asunto(s)
Madres/psicología , Núcleo Familiar , Infecciones por Papillomavirus/prevención & control , Vacunas contra Papillomavirus/economía , Aceptación de la Atención de Salud , Neoplasias del Cuello Uterino/prevención & control , Vacunación/economía , Adolescente , Adulto , Conducta de Elección , Estudios Transversales , Femenino , Humanos , Persona de Mediana Edad , Vacunas contra Papillomavirus/administración & dosificación , Población Rural , Vietnam , Adulto Joven
9.
J Community Health ; 42(2): 260-268, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-27638032

RESUMEN

Nepalese labor migrants and their wives are considered as at-risk populations for HIV infection. There may be a risk of HIV transmission from the labor migrant and their wives to the general population due to HIV-related risk behaviors, but so far empirical evidence to support this hypothesis is scarce. Therefore, this study was conducted to compare HIV-related risk behaviors between labor migrants, their wives, and males and females from the general population in the far-western region of Nepal. This was a cross-sectional study, in which structured face-to-face interviews were conducted with 261 male labor migrants, 262 wives of labor migrants, 123 males and 122 females from the general population. We found that the proportion of the labor migrants and their wives reporting having had extramarital sex in the previous year did not differ significantly with the males (11.9 vs. 13.4 %, p value 0.752) and females (2.0 vs. 1.7 %, p value 0.127) from the general population. However, the labor migrants compared with the males from the general population were 1.51 times and the wives of labor migrants compared with the females from the general population were 2.37 times more likely to have been tested for HIV. Both the males from the general population and the labor migrants are equally engaged in unprotected extramarital sex. Therefore, it is recommended that the prevention programs, including access to condoms and HIV testing, should be scaled up targeting a broader range of individuals in the far-western region of Nepal.


Asunto(s)
Infecciones por VIH/etiología , Esposos/estadística & datos numéricos , Migrantes/estadística & datos numéricos , Sexo Inseguro/estadística & datos numéricos , Adolescente , Adulto , Estudios Transversales , Femenino , Humanos , Entrevistas como Asunto , Masculino , Persona de Mediana Edad , Nepal , Factores de Riesgo , Conducta Sexual/estadística & datos numéricos , Adulto Joven
10.
Euro Surveill ; 22(21)2017 05 25.
Artículo en Inglés | MEDLINE | ID: mdl-28597832

RESUMEN

Current guidelines recommend hepatitis C virus (HCV) testing for HIV-infected men who have sex with men (MSM) with ongoing risk behaviour, without specifying the type of risk behaviour. We developed and validated the HCV-MOSAIC risk score to assist HCV testing in HIV-infected MSM. The risk score consisted of six self-reported risk factors identified using multivariable logistic regression using data from the Dutch MOSAIC study (n = 213, 2009-2013). Area under the ROC curve (AUC), sensitivity, specificity, post-test-probability-of-disease and diagnostic gain were calculated. The risk score was validated in case-control studies from Belgium (n = 142, 2010-2013) and the United Kingdom (n = 190, 2003-2005) and in cross-sectional surveys at a Dutch sexually transmitted infections clinic (n = 284, 2007-2009). The AUC was 0.82; sensitivity 78.0% and specificity 78.6%. In the validation studies sensitivity ranged from 73.1% to 100% and specificity from 56.2% to 65.6%. The post-test-probability-of-disease ranged from 5.9% to 20.0% given acute HCV prevalence of 1.7% to 6.4%, yielding a diagnostic gain of 4.2% to 13.6%. The HCV-MOSAIC risk score can successfully identify HIV-infected MSM at risk for acute HCV infection. It could be a promising tool to improve HCV testing strategies in various settings.


Asunto(s)
Infecciones por VIH/complicaciones , Hepacivirus/aislamiento & purificación , Hepatitis C/diagnóstico , Homosexualidad Masculina , Tamizaje Masivo/métodos , Adulto , Bélgica , Estudios de Casos y Controles , Infecciones por VIH/epidemiología , Hepatitis C/epidemiología , Humanos , Modelos Logísticos , Masculino , Prevalencia , Reproducibilidad de los Resultados , Factores de Riesgo , Asunción de Riesgos , Sensibilidad y Especificidad , Reino Unido
11.
Health Promot Int ; 31(3): 653-64, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26048865

RESUMEN

There is an urgent need to develop positive prevention interventions for adolescents living with HIV in high endemic regions. Adapting existing evidence-based interventions for resource-constrained settings is effective when the intervention's theoretical core elements are preserved while achieving cultural relevance. We describe the process of adapting a primary prevention to a secondary/positive prevention programme for adolescents living with HIV in Kenya and Uganda. The systematic adaptation was guided by the Centers for Diseases Control's map for the adaptation process, describing an iterative process. The procedure included: assessing the target positive prevention group's needs (safer sex; fertility-related issues), identifying the potential interventions through a literature review, conducting qualitative adaptation research to identify areas for adaptation by ensuring cultural relevance (revising the intervention logic by adding topics such as adherence; HIV-related stigma; HIV-disclosure; safer sex), pilot-testing the adapted programme and conducting a process evaluation of its first implementation. Areas added onto the original intervention's logic framework, based on social cognitive theory, the theories of reasoned action and planned behaviour were information and skills building on sexual relationships and protection behaviour, prevention of vertical HIV transmission, contraception, HIV-disclosure, HIV-related stigma, HIV-treatment and adherence. The process evaluation using mixed methods showed that we delivered a feasible and acceptable intervention for HIV-positive adolescents aged 13-17 years. The systematic approach adopted facilitated the development of a contextualized and developmentally appropriate (i.e. age-specific) intervention for adolescents living with HIV.


Asunto(s)
Infecciones por VIH/terapia , Prevención Primaria/métodos , Adolescente , Medicina del Adolescente/métodos , África Oriental , Femenino , Infecciones por VIH/prevención & control , Infecciones por VIH/psicología , Humanos , Masculino , Prevención Primaria/organización & administración , Desarrollo de Programa , Evaluación de Programas y Proyectos de Salud
12.
Women Health ; 56(7): 745-66, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-26630366

RESUMEN

HIV risk is determined by the interaction between social and individual risk factors, but information about such factors among Nepalese women is not yet understood. Therefore, to assess the risk factors and vulnerability of the wives of Nepalese labor migrants to HIV infection, the authors conducted a mixed-methods study in which a descriptive qualitative study was embedded within a case-control study. Two hundred twenty-four wives of labor migrants were interviewed in the case-control study, and two focus group discussions (n = 8 and 9) were conducted in the qualitative study. The authors found that illiteracy, low socio-economic status, and gender inequality contributed to poor knowledge and poor sexual negotiation among the wives of labor migrants and increased their risk of HIV through unprotected sex. Among male labor migrants, illiteracy, low socio-economic status, migration to India before marriage, and alcohol consumption contributed to liaisons with female sex workers, increasing the risk of HIV to the men and their wives through unprotected sex. Both labor migrants and their wives feared disclosure of positive HIV status due to HIV stigma and thus were less likely to be tested for HIV. HIV prevention programs should consider the interaction among these risk factors when targeting labor migrants and their wives.


Asunto(s)
Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Trabajadores Sexuales/estadística & datos numéricos , Conducta Sexual/estadística & datos numéricos , Esposos , Migrantes/psicología , Adulto , Femenino , Grupos Focales , Humanos , Entrevistas como Asunto , Masculino , Matrimonio , Persona de Mediana Edad , Nepal , Investigación Cualitativa , Factores de Riesgo , Asunción de Riesgos , Estigma Social , Factores Socioeconómicos , Encuestas y Cuestionarios , Sexo Inseguro/estadística & datos numéricos
13.
AIDS Care ; 27 Suppl 1: 36-46, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26616124

RESUMEN

Adolescents living with HIV (ALHIV) face many psychosocial challenges, including HIV disclosure to others. Given the importance of socialization during the adolescent transition process, this study investigated the psychological and social factors influencing self-disclosure of own HIV status to peers. We examined social HIV self-disclosure to peers, and its relationship to perceived HIV-related stigma, self-efficacy to disclose, self-esteem, and social support among a sample of n = 582 ALHIV aged 13-17 years in Kampala, Uganda, and Western Kenya. Data were collected between February and April 2011. Among them, 39% were double orphans. We conducted a secondary data analysis to assess the degree of social disclosure, reactions received, and influencing factors. Interviewer-administered questionnaires assessed medical, socio-demographic, and psychological variables (Rosenberg self-esteem scale; self-efficacy to disclose to peers), HIV-related stigma (10-item stigma scale), and social support (family-life and friends). Descriptive, bivariate, and logistic regression analyses were performed with social self-disclosure to peers with gender as covariates. Almost half of ALHIV had told nobody (except health-care providers) about their HIV status, and about 18% had disclosed to either one of their friends, schoolmates, or a boy- or girlfriend. Logistic regression models revealed that having disclosed to peers was significantly related to being older, being a paternal orphan, contributing to family income, regular visits to the HIV clinic, and greater social support through peers. Low self-efficacy to disclose was negatively associated to the outcome variable. While social self-disclosure was linked to individual factors such as self-efficacy, factors relating to the social context and adolescents' access to psychosocial resources play an important role. ALHIV need safe environments to practice disclosure skills. Interventions should enable them to make optimal use of available psychosocial resources even under constraining conditions such as disruptive family structures.


Asunto(s)
Protección a la Infancia , Infecciones por VIH/psicología , Autorrevelación , Estigma Social , Adolescente , Relaciones Familiares , Femenino , Humanos , Kenia , Masculino , Autoimagen , Uganda
14.
Sante Publique ; 27(4): 547-56, 2015.
Artículo en Francés | MEDLINE | ID: mdl-26751929

RESUMEN

The aim of this study was to investigate the effects of the national HIV/AIDS control programme on district hospitals in Cameroon. A multiple case study was conducted in two district hospitals- one public and one faith-based. Data were collected by document review, semi-structured interviews and observation of managerial processes and health care delivery. Programme interventions result in a series of positive and negative effects on the functioning of district hospitals and local health systems. High input and support of staff skills were observed for antiretroviral therapy and the management of opportunistic infections. However, the impact of the programme on the stewardship function is problematic. The low implication of district management teams in the implementation of HIV /AIDS activities reduces their structural capacity to run the local health systems. Programme and health system managers failed to take advantage of opportunities to develop synergies between the HIV/AIDS programme and local health systems. The HIV/AIDS programme weakens the systemic and structural capacity of local health systems. Managers of both programmes and general health systems should analyse and adapt their interventions in order to effective' strengthen health systems. One of the research questions is to understand why health system stakeholders do not seize opportunities to develop synergies between programmes and the general system and to strengthen health systems.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida/terapia , Infecciones por VIH/terapia , Hospitales de Distrito/organización & administración , Programas Nacionales de Salud/organización & administración , Infecciones Oportunistas Relacionadas con el SIDA/terapia , Síndrome de Inmunodeficiencia Adquirida/complicaciones , Fármacos Anti-VIH/uso terapéutico , Camerún , Atención a la Salud/organización & administración , Infecciones por VIH/complicaciones , Humanos , Estudios de Casos Organizacionales
15.
Sex Transm Infect ; 90(7): 545-9, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24687129

RESUMEN

OBJECTIVES: Cross-sectional studies have shown a strong association between Mycoplasma genitalium and HIV infections. We previously reported that in a cohort of female sex workers in Uganda, M genitalium infection at baseline was associated with HIV seroconversion. Here we examine the temporal association between the M genitalium infection status shortly before HIV seroconversion and HIV acquisition. METHODS: A nested case-control study was conducted within a cohort of women at high risk for HIV in Kampala. Cases were those of women acquiring HIV within 2 years of enrolment. For each of the 42 cases, 3 controls were selected from women HIV negative at the visit when the corresponding case first tested HIV seropositive. The association between HIV acquisition and M genitalium infection immediately prior to HIV testing was analysed using conditional logistic regression. RESULTS: There was weak evidence of an association between M genitalium infection and HIV acquisition overall (crude OR=1.57; 95% CI 0.67 to 3.72, aOR=2.28: 95% CI 0.81 to 6.47). However, time of M genitalium testing affected the association (p value for effect-modification=0.004). For 29 case-control sets with endocervical samples tested 3 months prior to the first HIV-positive result, M genitalium infection increased the risk of HIV acquisition (crude OR=3.09; 95% CI 1.06 to 9.05, aOR=7.19; 95% CI 1.68 to 30.77), whereas there was little evidence of an association among the 13 case-control sets with samples tested at an earlier visit (crude OR=0.30: 95% CI 0.04 to 2.51; aOR=0.34; 95% CI 0.02 to 5.94). CONCLUSIONS: Our study showed evidence of a temporal relationship between M genitalium infection and HIV acquisition that suggests that M genitalium infection may be a co-factor in the acquisition of HIV infection.


Asunto(s)
Infecciones por VIH/epidemiología , Seropositividad para VIH/epidemiología , Infecciones por Mycoplasma/epidemiología , Mycoplasma genitalium , Trabajadores Sexuales/estadística & datos numéricos , Adolescente , Adulto , Estudios de Casos y Controles , Femenino , Infecciones por VIH/transmisión , Humanos , Factores de Riesgo , Factores de Tiempo , Uganda/epidemiología , Adulto Joven
16.
PLoS One ; 19(4): e0300220, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38635546

RESUMEN

INTRODUCTION: Adolescents and young adults (AYA) face multiple barriers to accessing healthcare services, which can interact, creating complex needs that often impact health behaviours, leading to increased vulnerability to HIV. We aimed to identify distinct AYA subgroups based on patterns of barriers to HIV testing services and assess the association between these barrier patterns and sexual behaviour, socio-demographics, and HIV status. METHODS: Data were from Nigeria's AIDS Indicator and Impact Survey (NAIIS, 2018) and included 18,612 sexually active AYA aged 15-24 years who had never been tested for HIV and reported barriers to accessing HIV testing services. A Latent class analysis (LCA) model was built from 12 self-reported barrier types to identify distinct subgroups of AYA based on barrier patterns. Latent class regressions (LCR) were conducted to compare the socio-demographics, sexual behaviour, and HIV status across identified AYA subgroups. Sex behaviour characteristics include intergenerational sex, transactional sex, multiple sex partners, condom use, and knowledge of partner's HIV status. RESULTS: Our LCA model identified four distinct AYA subgroups termed 'low-risk perception' (n = 7,361; 39.5%), 'consent and proximity' (n = 5,163; 27.74%), 'testing site' (n = 4,996; 26.84%), and 'cost and logistics' (n = 1,092; 5.87%). Compared to adolescents and young adults (AYA) in the low-risk perception class, those in the consent and proximity class were more likely to report engaging in intergenerational sex (aOR 1.17, 95% CI 1.02-1.35), transactional sex (aOR 1.50, 95% CI 1.23-1.84), and have multiple sex partners (aOR 1.75, 95% CI 1.39-2.20), while being less likely to report condom use (aOR 0.79, 95% CI 0.63-0.99). AYA in the testing site class were more likely to report intergenerational sex (aOR 1.21, 95% CI 1.04-1.39) and transactional sex (aOR 1.53, 95% CI 1.26-1.85). AYA in the cost and logistics class were more likely to engage in transactional sex (aOR 2.12, 95% CI 1.58-2.84) and less likely to report condom use (aOR 0.58, 95% CI 0.34-0.98). There was no significant relationship between barrier subgroup membership and HIV status. However, being female, aged 15-24 years, married or cohabiting, residing in the Southsouth zone, and of Christian religion increased the likelihood of being HIV infected. CONCLUSIONS: Patterns of barriers to HIV testing are linked with differences in sexual behaviour and sociodemographic profiles among AYA, with the latter driving differences in HIV status. Findings can improve combination healthcare packages aimed at simultaneously addressing multiple barriers and determinants of vulnerability to HIV among AYA.


Asunto(s)
Infecciones por VIH , Humanos , Adolescente , Femenino , Adulto Joven , Masculino , Infecciones por VIH/diagnóstico , Infecciones por VIH/epidemiología , Nigeria/epidemiología , Análisis de Clases Latentes , Conducta Sexual , Parejas Sexuales , Prueba de VIH
17.
Sex Transm Infect ; 89(7): 595-601, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23723251

RESUMEN

OBJECTIVES: During the 2008 HIV prevalence survey carried out in the general population of Cotonou, Benin, face-to-face interviews (FTFI) were used to assess risky behaviours for HIV and other sexually transmitted infections (STI). We compared sexual behaviours reported in FTFI with those reported in polling booth surveys (PBS) carried out in parallel in an independent random sample of the same population. METHODS: In PBS, respondents grouped by gender and marital status answered simple questions by putting tokens with question numbers in a green box (affirmative answers) or a red box (negative answers). Both boxes were placed inside a private booth. For each group and question, data were gathered together by type of answer. The structured and gender-specific FTFI guided by trained interviewers included all questions asked during PBS. Pearson χ2 or Fisher's exact test was used to compare FTFI and PBS according to affirmative answers. RESULTS: Overall, respondents reported more stigmatised behaviours in PBS than in FTFI: the proportions of married women and men who reported ever having had commercial sex were 17.4% and 41.6% in PBS versus 1.8% and 19.6% in FTFI, respectively. The corresponding proportions among unmarried women and men were 16.1% and 25.5% in PBS versus 3.9% and 13.0% in FTFI, respectively. The proportion of married women who reported having had extramarital sex since marriage was 23.6% in PBS versus 4.6% in FTFI. CONCLUSIONS: PBS are suitable to monitor reliable HIV/STI risk behaviours. Their use should be expanded in behavioural surveillance.


Asunto(s)
Métodos Epidemiológicos , Infecciones por VIH/transmisión , Entrevistas como Asunto , Asunción de Riesgos , Adolescente , Adulto , Benin/epidemiología , Femenino , Infecciones por VIH/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Medición de Riesgo/métodos , Adulto Joven
18.
Sex Transm Dis ; 40(5): 422-7, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23588134

RESUMEN

BACKGROUND: There have been few studies of the natural history of Mycoplasma genitalium in women. We investigated patterns of clearance and recurrence of untreated M. genitalium infection in a cohort of female sex workers in Uganda. METHODS: Women diagnosed as having M. genitalium infection at enrollment were retested for the infection at 3-month intervals. Clearance of infection was defined as testing negative after having a previous positive result: persistence was defined as testing positive after a preceding positive test result, and recurrence as testing positive after a preceding negative test result. Adjusted hazard ratios for M. genitalium clearance were estimated using Cox proportional hazards regression. RESULTS: Among 119 participants infected with M. genitalium at enrollment (prevalence, 14%), 55% had spontaneously cleared the infection within 3 months; 83%, within 6; and 93%, within 12 months. The overall clearance rate was 25.7/100 person-years (pyr; 95% confidence interval, 21.4-31.0). HIV-positive women cleared M. genitalium infection more slowly than did HIV-negative women (20.6/100 pyr vs. 31.3/100 pyr, P = 0.03). The clearance rate was slower among HIV-positive women with CD4 counts less than 350/mL than among those with higher CD4 counts (9.88/100 pyr vs. 29.5/100 pyr, P <; 0.001). After clearing the infection, M. genitalium infection recurred in 39% women. CONCLUSIONS: M. genitalium is likely to persist and recur in the female genital tract. Because of the urogenital tract morbidity caused by the infection and the observed association with HIV acquisition, further research is needed to define screening modalities, especially in populations at high risk for HIV, and to optimize effective and affordable treatment options.


Asunto(s)
Genitales Femeninos/microbiología , Seropositividad para VIH/transmisión , Infecciones por Mycoplasma/microbiología , Mycoplasma genitalium/patogenicidad , Trabajadores Sexuales/estadística & datos numéricos , Enfermedades de Transmisión Sexual/microbiología , Adolescente , Adulto , Femenino , Estudios de Seguimiento , Genotipo , Seropositividad para VIH/epidemiología , Seropositividad para VIH/inmunología , Humanos , Infecciones por Mycoplasma/epidemiología , Infecciones por Mycoplasma/inmunología , Mycoplasma genitalium/aislamiento & purificación , Oportunidad Relativa , Prevalencia , Modelos de Riesgos Proporcionales , Prevención Secundaria , Trabajo Sexual , Conducta Sexual , Enfermedades de Transmisión Sexual/epidemiología , Enfermedades de Transmisión Sexual/inmunología , Uganda/epidemiología , Esparcimiento de Virus
19.
BMC Public Health ; 13: 265, 2013 Mar 22.
Artículo en Inglés | MEDLINE | ID: mdl-23521866

RESUMEN

BACKGROUND: Tuberculosis remains a major public health problem in sub-Saharan Africa. District hospitals (DHs) play a central role in district-based health systems, and their relation with vertical programmes is very important. Studies on the impact of vertical programmes on DHs are rare. This study aims to fill this gap. Its purpose is to analyse the interaction between the National Tuberculosis Control Programme (NTCP) and DHs in Cameroon, especially its effects on the human resources, routine health information system (HIS) and technical capacity at the hospital level. METHODS: We used a multiple case study methodology. From the Adamaoua Region, we selected two DHs, one public and one faith-based. We collected qualitative and quantitative data through document reviews, semi-structured interviews with district and regional staff, and observations in the two DHs. RESULTS: The NTCP trained and supervised staff, designed and provided tuberculosis data collection and reporting tools, and provided anti-tuberculosis drugs, reagents and microscopes to DHs. However, these interventions were limited to the hospital units designated as Tuberculosis Diagnostic and Treatment Centres and to staff dedicated to tuberculosis control activities. The NTCP installed a parallel HIS that bypassed the District Health Services. The DH that performs well in terms of general hospital care and that is well managed was successful in tuberculosis control. Based on the available resources, the two hospitals adapt the organisation of tuberculosis control to their settings. The management teams in charge of the District Health Services are not involved in tuberculosis control. In our study, we identified several opportunities to strengthen the local health system that have been missed by the NTCP and the health system managers. CONCLUSION: Well-managed DHs perform better in terms of tuberculosis control than DHs that are not well managed. The analysis of the effects of the NTCP on the human resources, HIS and technical capacity of DHs indicates that the NTCP supports, rather than strengthens, the local health system. Moreover, there is potential for this support to be enhanced. Positive synergies between the NTCP and district health systems can be achieved if opportunities to strengthen the district health system are seized. The question remains, however, of why managers do not take advantage of the opportunities to strengthen the health system.


Asunto(s)
Programas de Gobierno/organización & administración , Hospitales de Distrito/organización & administración , Relaciones Interinstitucionales , Tuberculosis/prevención & control , Camerún , Creación de Capacidad/organización & administración , Sistemas de Información en Salud/organización & administración , Recursos en Salud/organización & administración , Humanos , Estudios de Casos Organizacionales , Evaluación de Programas y Proyectos de Salud , Investigación Cualitativa
20.
Eur J Contracept Reprod Health Care ; 18(1): 15-26, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23320932

RESUMEN

OBJECTIVES: Family planning (FP) is essential in achieving the United Nations Millennium Development Goals. We critically review the evidence on HIV acquisition among women using hormonal contraception, and discuss the policy and operational implications. METHODS: Longitudinal studies conducted in sub-Saharan Africa published between 2008 and 2012, as well as key policy documents related to contraception and HIV were reviewed. RESULTS: Findings on hormonal contraception and HIV acquisition conducted in sub- Saharan Africa are inconsistent. While in the large scale studies no statistically significant association between oral contraceptive use and HIV acquisition was found, results for injectables were mixed. Potential biases, such as those resulting from self-selection, related to the observational study design and main confounders such as condom use, sexual activity and contraceptive use are discussed. CONCLUSIONS: It is currently not possible to conclude whether the use of hormonal contraceptives is associated with a greater risk of acquiring HIV, or not. The use of male or female condoms for dual protection should be promoted in FP programmes. While there is need for further research on a broader range of contraceptive methods and HIV transmission, studies documenting acceptability of currently less used/more recent contraceptive methods are also warranted.


Asunto(s)
Anticonceptivos Hormonales Orales/provisión & distribución , Medicina Basada en la Evidencia , Infecciones por VIH/prevención & control , Política de Salud , África del Sur del Sahara , Anticonceptivos Hormonales Orales/administración & dosificación , Femenino , Humanos , Estudios Longitudinales , Masculino
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