Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 31
Filtrar
1.
J Acquir Immune Defic Syndr ; 95(4): 313-317, 2024 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-38412045

RESUMEN

BACKGROUND: HIV testing is a critical step to accessing antiretroviral therapy (ART) because early diagnosis can facilitate earlier initiation of ART. This study presents aggregated data of individuals who self-reported being HIV-positive but subsequently tested HIV-negative during nationally representative Population-Based HIV Impact Assessment surveys conducted in 11 countries from 2015 to 2018. METHOD: Survey participants aged 15 years or older were interviewed by trained personnel using a standard questionnaire to determine HIV testing history and self-reported HIV status. Home-based HIV testing and counseling using rapid diagnostic tests with return of results were performed by survey staff according to the respective national HIV testing services algorithms on venous blood samples. Laboratory-based confirmatory HIV testing for all participants identified as HIV-positives and self-reported positives, irrespective of HIV testing results, was conducted and included Geenius HIV-1/2 and DNA polymerase chain reaction if Geenius was negative or indeterminate. RESULTS: Of the 16,630 participants who self-reported as HIV-positive, 16,432 (98.6%) were confirmed as HIV-positive and 198 (1.4%) were HIV-negative by subsequent laboratory-based testing. Participants who self-reported as HIV-positive but tested HIV-negative were significantly younger than 30 years, less likely to have received ART, and less likely to have received a CD4 test compared with participants who self-reported as HIV-positive with laboratory-confirmed infection. CONCLUSIONS: A small proportion of self-reported HIV-positive individuals could not be confirmed as positive, which could be due to initial misdiagnosis, deliberate wrong self-report, or misunderstanding of the questionnaire. As universal ART access is expanding, it is increasingly important to ensure quality of HIV testing and confirmation of HIV diagnosis before ART initiation.


Asunto(s)
Infecciones por VIH , Humanos , Infecciones por VIH/diagnóstico , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Autoinforme , Encuestas y Cuestionarios , Errores Diagnósticos , África del Sur del Sahara/epidemiología
2.
PLoS One ; 18(6): e0275560, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37363921

RESUMEN

BACKGROUND: We examined the epidemiology and transmission potential of HIV population viral load (VL) in 12 sub-Saharan African countries. METHODS: We analyzed data from Population-based HIV Impact Assessments (PHIAs), large national household-based surveys conducted between 2015 and 2019 in Cameroon, Cote d'Ivoire, Eswatini, Kenya, Lesotho, Malawi, Namibia, Rwanda, Tanzania, Uganda, Zambia, and Zimbabwe. Blood-based biomarkers included HIV serology, recency of HIV infection, and VL. We estimated the number of people living with HIV (PLHIV) with suppressed viral load (<1,000 HIV-1 RNA copies/mL) and with unsuppressed viral load (viremic), the prevalence of unsuppressed HIV (population viremia), sex-specific HIV transmission ratios (number female incident HIV-1 infections/number unsuppressed male PLHIV per 100 persons-years [PY] and vice versa) and examined correlations between a variety of VL metrics and incident HIV. Country sample sizes ranged from 10,016 (Eswatini) to 30,637 (Rwanda); estimates were weighted and restricted to participants 15 years and older. RESULTS: The proportion of female PLHIV with viral suppression was higher than that among males in all countries, however, the number of unsuppressed females outnumbered that of unsuppressed males in all countries due to higher overall female HIV prevalence, with ratios ranging from 1.08 to 2.10 (median: 1.43). The spatial distribution of HIV seroprevalence, viremia prevalence, and number of unsuppressed adults often differed substantially within the same countries. The 1% and 5% of PLHIV with the highest VL on average accounted for 34% and 66%, respectively, of countries' total VL. HIV transmission ratios varied widely across countries and were higher for male-to-female (range: 2.3-28.3/100 PY) than for female-to-male transmission (range: 1.5-10.6/100 PY). In all countries mean log10 VL among unsuppressed males was higher than that among females. Correlations between VL measures and incident HIV varied, were weaker for VL metrics among females compared to males and were strongest for the number of unsuppressed PLHIV per 100 HIV-negative adults (R2 = 0.92). CONCLUSIONS: Despite higher proportions of viral suppression, female unsuppressed PLHIV outnumbered males in all countries examined. Unsuppressed male PLHIV have consistently higher VL and a higher risk of transmitting HIV than females. Just 5% of PLHIV account for almost two-thirds of countries' total VL. Population-level VL metrics help monitor the epidemic and highlight key programmatic gaps in these African countries.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Adulto , Humanos , Masculino , Femenino , Infecciones por VIH/tratamiento farmacológico , Viremia/tratamiento farmacológico , Carga Viral , Estudios Seroepidemiológicos , Lesotho , Zimbabwe , Fármacos Anti-VIH/uso terapéutico
3.
PLoS One ; 18(3): e0282652, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36920918

RESUMEN

INTRODUCTION: We assessed progress in HIV viral load (VL) scale up across seven sub-Saharan African (SSA) countries and discussed challenges and strategies for improving VL coverage among patients on anti-retroviral therapy (ART). METHODS: A retrospective review of VL testing was conducted in Côte d'Ivoire, Kenya, Lesotho, Malawi, Namibia, Tanzania, and Uganda from January 2016 through June 2018. Data were collected and included the cumulative number of ART patients, number of patients with ≥ 1 VL test result (within the preceding 12 months), the percent of VL test results indicating viral suppression, and the mean turnaround time for VL testing. RESULTS: Between 2016 and 2018, the proportion of PLHIV on ART in all 7 countries increased (range 5.7%-50.2%). During the same time period, the cumulative number of patients with one or more VL test increased from 22,996 to 917,980. Overall, viral suppression rates exceeded 85% for all countries except for Côte d'Ivoire at 78% by June 2018. Reported turnaround times for VL testing results improved in 5 out of 7 countries by between 5.4 days and 27.5 days. CONCLUSIONS: These data demonstrate that remarkable progress has been made in the scale-up of HIV VL testing in the seven SSA countries.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Humanos , Carga Viral/métodos , Infecciones por VIH/diagnóstico , Infecciones por VIH/tratamiento farmacológico , Estudios Retrospectivos , Malaui , Côte d'Ivoire/epidemiología , Fármacos Anti-VIH/uso terapéutico
4.
PLoS One ; 17(8): e0272727, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35951592

RESUMEN

BACKGROUND: Hypertension (HTN) is highly prevalent among people with HIV (PWH) in Namibia, but screening and treatment for HTN are not routinely offered as part of HIV care delivery. We report the implementation of a quality improvement collaborative (QIC) to accelerate integration of HTN and HIV care within public-sector health facilities in Namibia. METHODS: Twenty-four facilities participated in the QIC with the aim of increasing HTN screening and treatment among adult PWH (>15 years). HTN was defined according to national treatment guidelines (i.e., systolic blood pressure >140 and/or diastolic blood pressure >90 across three measurements and at least two occasions), and decisions regarding initiation of treatment were made by physicians only. Teams from participating hospitals used quality improvement methods, monthly measurement of performance indicators, and small-scale tests of change to implement contextually tailored interventions. Coaching of sites was performed on a monthly basis by clinical officers with expertise in QI and HIV, and sites were convened as part of learning sessions to facilitate diffusion of effective interventions. RESULTS: Between March 2017 and March 2018, hypertension screening occurred as part of 183,043 (86%) clinical encounters at participating facilities. Among 1,759 PWH newly diagnosed with HTN, 992 (56%) were initiated on first-line treatment. Rates of treatment initiation were higher in facilities with an on-site physician (61%) compared to those without one (51%). During the QIC, facility teams identified fourteen interventions to improve HTN screening and treatment. Among barriers to implementation, teams pointed to malfunctions of blood pressure machines and stock outs of antihypertensive medications as common challenges. CONCLUSIONS: Implementation of a QIC provided a structured approach for integrating HTN and HIV services across 24 high-volume facilities in Namibia. As rates of HTN treatment remained low despite ongoing facility-level changes, policy-level interventions-such as task sharing and supply chain strengthening-should be pursued to further improve delivery of HTN care among PWH beyond initial screening.


Asunto(s)
Infecciones por VIH , Hipertensión , Adulto , Antihipertensivos/uso terapéutico , Infecciones por VIH/complicaciones , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Humanos , Hipertensión/tratamiento farmacológico , Hipertensión/terapia , Namibia/epidemiología , Mejoramiento de la Calidad
5.
BMC Health Serv Res ; 22(1): 498, 2022 Apr 14.
Artículo en Inglés | MEDLINE | ID: mdl-35422033

RESUMEN

BACKGROUND: Namibia is a large sparsely populated country with a high prevalence of HIV. People living with HIV who reside in remote areas often travel long distances through tough desert terrain to access HIV care and treatment. To address this barrier, community-based antiretroviral therapy (C-BART) sites were established in Okongo (2007-2008) and Eenhana districts (2016) of northern Namibia with the goal of bringing HIV and other health services closer patients' homes. We conducted a qualitative evaluation of the acceptability and challenges of C-BART to guide program improvement. METHODS: For this qualitative descriptive study, research assistants collected data (August-December 2017) through in-depth interviews with 40 patients, seven health extension workers, and 11 policy/program managers, and through four focus group discussions with healthcare workers. Interviews were audio-recorded, translated, and coded using MAXQDA v.12. Data were analyzed using thematic analysis. RESULTS: The evaluation identified five themes: community ownership, acceptance of the C-BART sites, benefits of the C-BART program for the PLHIV community and their social networks, benefits of the C-BART program to the main health facility, and challenges with the C-BART program. The C-BART program was reported as life-changing by many patients who had previously struggled to afford four-wheel drive vehicles to access care. Patients and healthcare workers perceived that the community as a whole benefited from the C-BART sites not only due to the financial pressure lifted from friends and family members previously asked to help cover expensive transportation, but also due to the perception of diminished stigmatization of people living with HIV and improved health. The C-BART sites became a source of community and social support for those accessing the sites. Healthcare workers reported greater job satisfaction and decongestion of health facilities. The challenges that they reported included delays in authorization of vehicles for transportation to C-BART sites and lack of incentives to provide services in the community. CONCLUSION: The C-BART program can serve as a model of care to expand access to HIV care and treatment and other health services to populations in remote settings, including rural and difficult-to-reach regions. The needs of healthcare workers should also be considered for the optimal delivery of such a model.


Asunto(s)
Infecciones por VIH , Antirretrovirales/uso terapéutico , Grupos Focales , Infecciones por VIH/tratamiento farmacológico , Humanos , Namibia , Investigación Cualitativa
6.
PLoS One ; 17(4): e0266438, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35421126

RESUMEN

Despite progress on population-level HIV viral suppression, unknown outcomes amongst people who have initiated antiretroviral therapy (ART) in low- and middle-income countries, commonly referred to as loss to follow-up (LTFU), remains a barrier. The mean global estimate of LTFU is 20%, exceeding the World Health Organization target of <15%. Pervasive predictors associated with LTFU include younger age, low body mass index, low CD4 count, advanced HIV clinical stage and certain ART regimens. In Namibia, ART use by eligible individuals exceeds 85%, surpassing the global average. Nonetheless, LTFU remains a barrier to achieving viral suppression and requires research to elucidate context-specific factors. An observational cohort study was conducted in Namibia in 2012 by administering surveys to individuals who presented for HIV care and initiated ART for the first time. Additional data were collected from routine medical data monitoring systems. Participants classified as LTFU at 12 months were traced to confirm their status. Predictors of LTFU were analyzed using multivariable logistic regression. Of those who presented consecutively to initiate ART, 524 were identified as eligible to enroll in the study, 497 enrolled, and 474 completed the baseline questionnaire. The cohort had mean age 36 years, 39% were male, mean CD4 cell count 222 cells/mm3, 17% were WHO HIV clinical stage III-IV, and 14% started efavirenz-based regimens. Tracing participants classified as LTFU yielded a re-categorization from 27.8% (n = 132) to 14.3% (n = 68) LTFU. In the final multivariable model, factors associated with confirmed LTFU status were: younger age (OR 0.97, 95% CI 1.00-1.06, p = 0.02); male sex (OR 2.34, CI 1.34-4.06, p = 0.003); difficulty leaving work or home to attend clinic (OR 2.55, CI 1.40-4.65, p = 0.002); and baseline efavirenz-based regimen (OR 2.35, CI 1.22-4.51, p = 0.01). Interventions to reduce LTFU should therefore target young men, particularly those who report difficulty leaving work or home to attend clinic and are on an efavirenz-based regimen.


Asunto(s)
Fármacos Anti-VIH , Infecciones por VIH , Adulto , Fármacos Anti-VIH/uso terapéutico , Antirretrovirales/uso terapéutico , Femenino , Estudios de Seguimiento , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Humanos , Perdida de Seguimiento , Masculino , Namibia/epidemiología
8.
AIDS Care ; 33(10): 1308-1311, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-33486974

RESUMEN

In household-based surveys that include rapid HIV testing services (HTS), passive referral systems that give HIV-positive participants information about how and where to access ART but minimal follow-up support from survey staff may result in suboptimal linkage. In the 2017 Namibia Population-based HIV Impact Assessment (NAMPHIA), we piloted a system of active linkage to care and ART (ALCART) that utilized the infrastructure of existing community-based partner organizations (CBPOs). All HIV-positive participants age 15-64 years not on ART were given standard passive referrals to ART plus the option to participate in ALCART. Cases were assigned to CBPOs in participants' localities. Healthcare workers from the CBPO's contacted cases and facilitated their linkage to facility-based ART. A total of 510 participants were eligible and consented to ALCART. The majority were new diagnoses (80.8%), while the remainder were previously diagnosed but not on ART (19.2%). Of the 510, 473 (92.7%) were successfully linked into care. Of these, all but one initiated ART. Our ALCART system used existing CBPOs and contributed to >90% linkage-to-care and >99% ART-initiation among linked participants in a large, nationally-representative survey. This approach can be used to improve the potential benefits of HTS in other large population-based surveys.


Asunto(s)
Infecciones por VIH , Prueba de VIH , Adolescente , Adulto , Infecciones por VIH/diagnóstico , Infecciones por VIH/epidemiología , Humanos , Persona de Mediana Edad , Namibia/epidemiología , Derivación y Consulta , Encuestas y Cuestionarios , Adulto Joven
9.
BMC Public Health ; 20(1): 1838, 2020 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-33261569

RESUMEN

BACKGROUND: In 2016, Namibia had ~ 230,000 people living with HIV (PLHIV) and 9154 new tuberculosis (TB) cases, including 3410 (38%) co-infected cases. TB preventative therapy (TPT), consisting of intensive case finding and isoniazid preventative therapy, is critical to reducing TB disease and mortality. METHODS: Between November 2014 and February 2015, data was abstracted from charts of PLHIV enrolled in HIV treatment. Fifty-five facilities were purposively selected based on patient volume, type and location. Charts were randomly sampled. The primary outcome was to estimate baseline TPT in PLHIV, using nationally weighted proportions. Qualitative surveys were conducted and summarized to evaluate TPT practices and quantify challenges encountered by health care workers (HCW). RESULTS: Among 861 PLHIV sampled, 96% were eligible for TPT services, of which 87.1% were screened for TB at least once. For PLHIV eligible for preventative therapy (646/810; 82.6%), 45.4% (294/646) initiated therapy and 45.7% (139/294) of those completed therapy. The proportion of eligible PLHIV completing TB screening, initiating preventative therapy and then completing preventative therapy was 20.7%. Qualitative surveys with 271 HCW identified barriers to TPT implementation including: lack of training (61.3% reported receiving training on TPT); misunderstandings about timing of TPT initiation (46.7% correctly reported TPT should be started with antiretroviral therapy); and variable screening practices and responsibilities (66.1% of HCWs screened for TB at every encounter). Though barriers were evident, 72.2% HCWs surveyed described their clinical performance as very good, often placing responsibility of difficulties on patients and downplaying challenges like staff shortages and medication stock outs. CONCLUSIONS: In this study, only 1 in 5 eligible PLHIV completed the TPT cascade in Namibia. Lack of training, irregularities with TB screening and timing of TPT, unclear prescribing and recording responsibilities, and a clinical misperception may have contributed to suboptimal programmatic implementation. Addressing these challenges will be critical with continued TPT scale-up.


Asunto(s)
Antituberculosos/uso terapéutico , Cumplimiento y Adherencia al Tratamiento/estadística & datos numéricos , Adulto , Coinfección/tratamiento farmacológico , Coinfección/epidemiología , Femenino , Infecciones por VIH/tratamiento farmacológico , Humanos , Isoniazida/uso terapéutico , Masculino , Tamizaje Masivo , Persona de Mediana Edad , Namibia/epidemiología , Tuberculosis/prevención & control
10.
MMWR Morb Mortal Wkly Rep ; 69(42): 1549-1551, 2020 Oct 23.
Artículo en Inglés | MEDLINE | ID: mdl-33090979

RESUMEN

Namibia is an upper-middle income country in southern Africa, with a population of approximately 2.5 million (1). On March 13, 2020, the first two cases of coronavirus disease 2019 (COVID-19) in Namibia were identified among recently arrived international travelers. On March 17, Namibia's president declared a state of emergency, which introduced measures such as closing of all international borders, enactment of regional travel restrictions, closing of schools, suspension of gatherings, and implementation of physical distancing measures across the country. As of October 19, 2020, Namibia had reported 12,326 laboratory-confirmed COVID-19 cases and 131 COVID-19-associated deaths. CDC, through its Namibia country office, as part of ongoing assistance from the U.S. President's Emergency Plan for AIDS Relief (PEPFAR) provided technical assistance to the Ministry of Health and Social Services (MoHSS) for rapid coordination of the national human immunodeficiency virus (HIV) treatment program with the national COVID-19 response.


Asunto(s)
Infecciones por Coronavirus/prevención & control , Infecciones por VIH/tratamiento farmacológico , Pandemias/prevención & control , Neumonía Viral/prevención & control , Desarrollo de Programa , Fármacos Anti-VIH/uso terapéutico , COVID-19 , Servicios de Salud Comunitaria/organización & administración , Infecciones por Coronavirus/epidemiología , Humanos , Namibia/epidemiología , Neumonía Viral/epidemiología
11.
Hum Resour Health ; 18(1): 61, 2020 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-32873303

RESUMEN

BACKGROUND: The Namibian Ministry of Health and Social Services (MoHSS) piloted the first HIV Project ECHO (Extension for Community Health Outcomes) in Africa at 10 clinical sites between 2015 and 2016. Goals of Project ECHO implementation included strengthening clinical capacity, improving professional satisfaction, and reducing isolation while addressing HIV service challenges during decentralization of antiretroviral therapy. METHODS: MoHSS conducted a mixed-methods evaluation to assess the pilot. Methods included pre/post program assessments of healthcare worker knowledge, self-efficacy, and professional satisfaction; assessment of continuing professional development (CPD) credit acquisition; and focus group discussions and in-depth interviews. Analysis compared the differences between pre/post scores descriptively. Qualitative transcripts were analyzed to extract themes and representative quotes. RESULTS: Knowledge of clinical HIV improved 17.8% overall (95% confidence interval 12.2-23.5%) and 22.3% (95% confidence interval 13.2-31.5%) for nurses. Professional satisfaction increased 30 percentage points. Most participants experienced reduced professional isolation (66%) and improved CPD credit access (57%). Qualitative findings reinforced quantitative results. Following the pilot, the Namibia MoHSS Project ECHO expanded to over 40 clinical sites by May 2019 serving more than 140 000 people living with HIV. CONCLUSIONS: Similar to other Project ECHO evaluation results in the United States of America, Namibia's Project ECHO led to the development of ongoing virtual communities of practice. The evaluation demonstrated the ability of the Namibia HIV Project ECHO to improve healthcare worker knowledge and satisfaction and decrease professional isolation.


Asunto(s)
Infecciones por VIH , Personal de Salud , Grupos Focales , Infecciones por VIH/tratamiento farmacológico , Humanos , Evaluación de Programas y Proyectos de Salud , Estados Unidos , Recursos Humanos
12.
Medicine (Baltimore) ; 99(37): e21661, 2020 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-32925712

RESUMEN

To support optimal third-line antiretroviral therapy (ART) selection in Namibia, we investigated the prevalence of HIV drug resistance (HIVDR) at time of failure of second-line ART. A cross-sectional study was conducted between August 2016 and February 2017. HIV-infected people ≥15 years of age with confirmed virological failure while receiving ritonavir-boosted protease inhibitor (PI/r)-based second-line ART were identified at 15 high-volume ART clinics representing over >70% of the total population receiving second-line ART. HIVDR genotyping of dried blood spots obtained from these individuals was performed using standard population sequencing methods. The Stanford HIVDR algorithm was used to identify sequences with predicted resistance; genotypic susceptibility scores for potential third-line regimens were calculated. Two hundred thirty-eight individuals were enrolled; 57.6% were female. The median age and duration on PI/r-based ART at time of enrolment were 37 years and 3.46 years, respectively. 97.5% received lopinavir/ritonavir-based regimens. The prevalence of nucleoside reverse transcriptase inhibitor (NRTI), non-nucleoside reverse transcriptase inhibitor (NNRTI), and PI/r resistance was 50.6%, 63.1%, and 13.1%, respectively. No significant association was observed between HIVDR prevalence and age or sex. This study demonstrates high levels of NRTI and NNRTI resistance and moderate levels of PI resistance in people receiving PI/r-based second-line ART in Namibia. Findings underscore the need for objective and inexpensive measures of adherence to identify those in need of intensive adherence counselling, routine viral load monitoring to promptly detect virological failure, and HIVDR genotyping to optimize selection of third-line drugs in Namibia.


Asunto(s)
Fármacos Anti-VIH/uso terapéutico , Farmacorresistencia Viral , Infecciones por VIH/tratamiento farmacológico , Adolescente , Adulto , Estudios Transversales , Femenino , VIH/efectos de los fármacos , Humanos , Lopinavir/uso terapéutico , Masculino , Persona de Mediana Edad , Namibia/epidemiología , Prevalencia , Inhibidores de la Transcriptasa Inversa/uso terapéutico , Ritonavir/uso terapéutico , Insuficiencia del Tratamiento , Adulto Joven
13.
MMWR Morb Mortal Wkly Rep ; 69(19): 582-586, 2020 May 15.
Artículo en Inglés | MEDLINE | ID: mdl-32407305

RESUMEN

Although mother-to-child transmission (MTCT) of human immunodeficiency virus (HIV) is preventable through antiretroviral treatment (ART) during pregnancy and postpartum, the Joint United Nations Programme on HIV/AIDS (UNAIDS) estimates that 160,000 new HIV infections occurred among children in 2018 (1). Child survival and HIV-free survival rates* are standard measures of progress toward eliminating MTCT† (2). Nationally representative Population-based HIV Impact Assessment (PHIA)§ survey data, pooled from eight sub-Saharan African countries¶ were used to calculate survival probability among children aged ≤3 years by maternal HIV status during pregnancy and HIV-free survival probability among children aged ≤3 years born to women with HIV infection, stratified by maternal ART** status during pregnancy. Survival probability was significantly lower among children born to women with HIV infection (94.7%) than among those born to women without HIV infection (97.6%). HIV-free survival probability of children born to women with HIV infection differed significantly by the timing of initiation of maternal ART: 93.0% among children whose mothers received ART before pregnancy, 87.8% among those whose mothers initiated ART during pregnancy, and 53.4% among children whose mothers did not receive ART during pregnancy. Focusing on prevention of HIV acquisition and, among women of reproductive age with HIV infection, on early diagnosis of HIV infection and ART initiation when applicable, especially before pregnancy, can improve child survival and HIV-free survival.


Asunto(s)
Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Tasa de Supervivencia/tendencias , África del Sur del Sahara/epidemiología , Fármacos Anti-VIH/uso terapéutico , Preescolar , Femenino , Infecciones por VIH/mortalidad , Infecciones por VIH/transmisión , Humanos , Lactante , Transmisión Vertical de Enfermedad Infecciosa/prevención & control , Masculino , Embarazo , Complicaciones Infecciosas del Embarazo/diagnóstico , Complicaciones Infecciosas del Embarazo/tratamiento farmacológico
14.
JMIR Public Health Surveill ; 6(2): e17107, 2020 06 24.
Artículo en Inglés | MEDLINE | ID: mdl-32348290

RESUMEN

BACKGROUND: Direct measures of HIV incidence are needed to assess the population-level impact of prevention programs but are scarcely available in the subnational epidemic hotspots of sub-Saharan Africa. We created a sentinel HIV incidence cohort within a community-based program that provided home-based HIV testing to all residents of Namibia's Zambezi region, where approximately 24% of the adult population was estimated to be living with HIV. OBJECTIVE: The aim of this study was to estimate HIV incidence, detect correlates of HIV acquisition, and assess the feasibility of the sentinel, community-based approach to HIV incidence surveillance in a subnational epidemic hotspot. METHODS: Following the program's initial home-based testing (December 2014-July 2015), we purposefully selected 10 clusters of 60 to 70 households each and invited residents who were HIV negative and aged ≥15 years to participate in the cohort. Consenting participants completed behavioral interviews and a second HIV test approximately 1 year later (March-September 2016). We used Poisson models to calculate HIV incidence rates between baseline and follow-up and multivariable Cox proportional hazard models to assess the correlates of seroconversion. RESULTS: Among 1742 HIV-negative participants, 1624 (93.23%) completed follow-up. We observed 26 seroconversions in 1954 person-years (PY) of follow-up, equating to an overall incidence rate of 1.33 per 100 PY (95% CI 0.91-1.95). Among women, the incidence was 1.55 per 100 PY (95% CI 1.12-2.17) and significantly higher among those aged 15 to 24 years and residing in rural areas (adjusted hazard ratio [aHR] 4.26, 95% CI 1.39-13.13; P=.01), residing in the Ngweze suburb of Katima Mulilo city (aHR 2.34, 95% CI 1.25-4.40; P=.01), who had no prior HIV testing in the year before cohort enrollment (aHR 3.38, 95% CI 1.04-10.95; P=.05), and who had engaged in transactional sex (aHR 17.64, 95% CI 2.88-108.14; P=.02). Among men, HIV incidence was 1.05 per 100 PY (95% CI 0.54-2.31) and significantly higher among those aged 40 to 44 years (aHR 13.04, 95% CI 5.98-28.41; P<.001) and had sought HIV testing outside the study between baseline and follow-up (aHR 8.28, 95% CI 1.39-49.38; P=.02). No seroconversions occurred among persons with HIV-positive partners on antiretroviral treatment. CONCLUSIONS: Nearly three decades into Namibia's generalized HIV epidemic, these are the first estimates of HIV incidence for its highest prevalence region. By creating a sentinel incidence cohort from the infrastructure of an existing community-based testing program, we were able to characterize current transmission patterns, corroborate known risk factors for HIV acquisition, and provide insight into the efficacy of prevention interventions in a subnational epidemic hotspot. This study demonstrates an efficient and scalable framework for longitudinal HIV incidence surveillance that can be implemented in diverse sentinel sites and populations.


Asunto(s)
Infecciones por VIH/diagnóstico , Incidencia , Vigilancia de Guardia , Adolescente , Adulto , Estudios de Cohortes , Femenino , Infecciones por VIH/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Namibia/epidemiología , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Factores de Riesgo
16.
AIDS ; 33(11): 1797-1799, 2019 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-31149946

RESUMEN

: Use of dolutegravir-based first-line antiretroviral therapy (ART) in response to rising levels of pretreatment HIV drug resistance (PDR) to non-nucleoside reverse transcriptase inhibitors (NNRTIs) may be limited, given safety concerns for birth defects in women of child-bearing potential. Pooled data from 11 nationally representative surveys show that NNRTI PDR in women is nearly twice that in men, exceeding 10% in 8 of 11 countries monitored, suggesting the urgent need for a non-NNRTI-based ART regimen in this population.


Asunto(s)
Farmacorresistencia Viral , Infecciones por VIH/tratamiento farmacológico , Compuestos Heterocíclicos con 3 Anillos/uso terapéutico , Inhibidores de la Transcriptasa Inversa/uso terapéutico , Femenino , VIH-1/efectos de los fármacos , Compuestos Heterocíclicos con 3 Anillos/efectos adversos , Humanos , Oxazinas , Piperazinas , Piridonas , Salud Reproductiva , Inhibidores de la Transcriptasa Inversa/efectos adversos
17.
Open Forum Infect Dis ; 5(2): ofy014, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30568984

RESUMEN

Three hundred sixty-six adult patients in Namibia with second-line virologic failures were evaluated for human immunodeficiency virus drug-resistant (HIVDR) mutations. Less than half (41.5%) harbored ≥1 HIVDR mutations to standardized second-line antiretroviral therapy (ART) regimen. Optimizing adherence, viral load monitoring, and genotyping are critical to prevent emergence of resistance, as well as unnecessary switching to costly third-line ART regimens.

18.
BMC Pregnancy Childbirth ; 18(1): 363, 2018 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-30185161

RESUMEN

BACKGROUND: Disrespectful and abusive maternity care is a complex phenomenon. In Namibia, HIV and high maternal mortality ratios make it vital to understand factors affecting maternity care quality. We report on two studies commissioned by Namibia's Ministry of Health and Social Services. A health worker study examined cultural and structural factors that influence maternity care workers' attitudes and practices, and a maternal and neonatal mortality study explored community perceptions about maternity care. METHODS: The health worker study involved medical officers, matrons, and registered or enrolled nurses working in Namibia's 35 district and referral hospitals. The study included a survey (N = 281) and 19 focus group discussions. The community study conducted 12 focus groups in five southern regions with recently delivered mothers and relatives. RESULTS: Most participants in the health worker study were experienced maternity care nurses. One-third (31%) of survey respondents reported witnessing or knowing of client mistreatment at their hospital, about half (49%) agreed that "sometimes you have to yell at a woman in labor," and a third (30%) agreed that pinching or slapping a laboring woman can make her push harder. Nurses were much more likely to agree with these statements than medical officers. Health workers' commitment to babies' welfare and stressful workloads were the two primary reasons cited to justify "harsh" behaviors. Respondents who were dissatisfied with their workload were twice as likely to approve of pinching or slapping. Half of the nurses surveyed (versus 14% of medical officers) reported providing care above or beneath their scope of work. The community focus group study identified 14 negative practices affecting clients' maternity care experiences, including both systemic and health-worker-related practices. CONCLUSIONS: Namibia's public sector hospital maternity units confront health workers and clients with structural and cultural impediments to quality care. Negative interactions between health workers and laboring women were reported as common, despite high health worker commitment to babies' welfare. Key recommendations include multicomponent interventions that address heavy workloads and other structural factors, educate communities and the media about maternity care and health workers' roles, incorporate client-centered care into preservice education, and ensure ongoing health worker mentoring and supervision.


Asunto(s)
Actitud del Personal de Salud , Actitud Frente a la Salud , Conocimientos, Actitudes y Práctica en Salud , Servicios de Salud Materna/estadística & datos numéricos , Adulto , Estudios Transversales , Femenino , Grupos Focales , Personal de Salud/estadística & datos numéricos , Humanos , Masculino , Servicios de Salud Materna/normas , Namibia , Embarazo , Calidad de la Atención de Salud/estadística & datos numéricos , Encuestas y Cuestionarios
19.
Open Forum Infect Dis ; 5(9): ofy200, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-30211248

RESUMEN

BACKGROUND: In 2015, Namibia implemented an Acceleration Plan to address the high burden of HIV (13.0% adult prevalence and 216 311 people living with HIV [PLHIV]) and achieve the UNAIDS 90-90-90 targets by 2020. We provide an update on Namibia's overall progress toward achieving these targets and estimate the percent reduction in HIV incidence since 2010. METHODS: Data sources include the 2013 Namibia Demographic and Health Survey (2013 NDHS), the national electronic patient monitoring system, and laboratory data from the Namibian Institute of Pathology. These sources were used to estimate (1) the percentage of PLHIV who know their HIV status, (2) the percentage of PLHIV on antiretroviral therapy (ART), (3) the percentage of patients on ART with suppressed viral loads, and (4) the percent reduction in HIV incidence. RESULTS: In the 2013 NDHS, knowledge of HIV status was higher among HIV-positive women 91.8% (95% confidence interval [CI], 89.4%-93.7%) than HIV-positive men 82.5% (95% CI, 78.1%-86.1%). At the end of 2016, an estimated 88.3% (95% CI, 86.3%-90.1%) of PLHIV knew their status, and 165 939 (76.7%) PLHIV were active on ART. The viral load suppression rate among those on ART was 87%, and it was highest among ≥20-year-olds (90%) and lowest among 15-19-year-olds (68%). HIV incidence has declined by 21% since 2010. CONCLUSIONS: With 76.7% of PLHIV on ART and 87% of those on ART virally suppressed, Namibia is on track to achieve UNAIDS 90-90-90 targets by 2020. Innovative strategies are needed to improve HIV case identification among men and adherence to ART among youth.

20.
J Antimicrob Chemother ; 73(11): 3137-3142, 2018 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-30137412

RESUMEN

Background: Continued use of standardized, first-line ART containing NNRTIs and NRTIs may contribute to ongoing emergence of HIV drug resistance (HIVDR) in Namibia. Methods: A nationally representative cross-sectional survey was conducted during 2015-16 to estimate the prevalence of significant pretreatment HIV drug resistance (PDR) and viral load (VL) suppression rates 6-12 months after initiating standardized first-line ART. Consenting adult patients (≥18 years) initiating ART were interviewed about prior antiretroviral drug (ARV) exposure and underwent resistance testing using dried blood spot samples. PDR was defined as mutations causing low-, intermediate- and high-level resistance to ARVs according to the 2014 WHO Surveillance of HIV Drug Resistance in Adults Initiating ART. The prevalence of PDR was described by patient characteristics, ARV exposure and VL results. Results were weighted to be nationally representative. Results: Successful genotyping was performed for 381 specimens; 144 (36.6%) specimens demonstrated HIVDR, of which 54 (12.7%) demonstrated PDR. Resistance to NNRTIs was most prevalent (11.9%). PDR was higher in patients with previous ARV exposure compared with no exposure (30.5% versus 9.6%) (prevalence ratio = 3.17; P < 0.01). Conclusions: This survey demonstrated overall PDR at >10% among adults initiating ART in Namibia. Patients with prior ARV exposure had higher rates of PDR. Introducing a non-NNRTI-based regimen for first-line ART should be considered to maximize benefit of ART and minimize the emergence of HIVDR.


Asunto(s)
Fármacos Anti-VIH/administración & dosificación , Terapia Antirretroviral Altamente Activa , Farmacorresistencia Viral/genética , Infecciones por VIH/tratamiento farmacológico , VIH-1/efectos de los fármacos , Carga Viral/efectos de los fármacos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Estudios Transversales , Femenino , Genotipo , Infecciones por VIH/epidemiología , VIH-1/genética , Humanos , Masculino , Persona de Mediana Edad , Mutación , Namibia/epidemiología , Prevalencia , Adulto Joven
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...