Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 3.338
Filtrar
Más filtros

Intervalo de año de publicación
1.
Nature ; 623(7988): 757-764, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37968390

RESUMEN

Extreme weather events perturb ecosystems and increasingly threaten biodiversity1. Ecologists emphasize the need to forecast and mitigate the impacts of these events, which requires knowledge of how risk is distributed among species and environments. However, the scale and unpredictability of extreme events complicate risk assessment1-4-especially for large animals (megafauna), which are ecologically important and disproportionately threatened but are wide-ranging and difficult to monitor5. Traits such as body size, dispersal ability and habitat affiliation are hypothesized to determine the vulnerability of animals to natural hazards1,6,7. Yet it has rarely been possible to test these hypotheses or, more generally, to link the short-term and long-term ecological effects of weather-related disturbance8,9. Here we show how large herbivores and carnivores in Mozambique responded to Intense Tropical Cyclone Idai, the deadliest storm on record in Africa, across scales ranging from individual decisions in the hours after landfall to changes in community composition nearly 2 years later. Animals responded behaviourally to rising floodwaters by moving upslope and shifting their diets. Body size and habitat association independently predicted population-level impacts: five of the smallest and most lowland-affiliated herbivore species declined by an average of 28% in the 20 months after landfall, while four of the largest and most upland-affiliated species increased by an average of 26%. We attribute the sensitivity of small-bodied species to their limited mobility and physiological constraints, which restricted their ability to avoid the flood and endure subsequent reductions in the quantity and quality of food. Our results identify general traits that govern animal responses to severe weather, which may help to inform wildlife conservation in a volatile climate.


Asunto(s)
Tamaño Corporal , Tormentas Ciclónicas , Mamíferos , Animales , Altitud , Biodiversidad , Carnivoría , Conservación de los Recursos Naturales , Dieta/veterinaria , Ecosistema , Clima Extremo , Inundaciones , Predicción , Herbivoria , Mamíferos/anatomía & histología , Mamíferos/fisiología , Mozambique
2.
Nature ; 615(7954): 866-873, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36991187

RESUMEN

The urban peoples of the Swahili coast traded across eastern Africa and the Indian Ocean and were among the first practitioners of Islam among sub-Saharan people1,2. The extent to which these early interactions between Africans and non-Africans were accompanied by genetic exchange remains unknown. Here we report ancient DNA data for 80 individuals from 6 medieval and early modern (AD 1250-1800) coastal towns and an inland town after AD 1650. More than half of the DNA of many of the individuals from coastal towns originates from primarily female ancestors from Africa, with a large proportion-and occasionally more than half-of the DNA coming from Asian ancestors. The Asian ancestry includes components associated with Persia and India, with 80-90% of the Asian DNA originating from Persian men. Peoples of African and Asian origins began to mix by about AD 1000, coinciding with the large-scale adoption of Islam. Before about AD 1500, the Southwest Asian ancestry was mainly Persian-related, consistent with the narrative of the Kilwa Chronicle, the oldest history told by people of the Swahili coast3. After this time, the sources of DNA became increasingly Arabian, consistent with evidence of growing interactions with southern Arabia4. Subsequent interactions with Asian and African people further changed the ancestry of present-day people of the Swahili coast in relation to the medieval individuals whose DNA we sequenced.


Asunto(s)
Pueblo Africano , Asiático , Genética de Población , Femenino , Humanos , Masculino , Pueblo Africano/genética , Asiático/genética , Historia Medieval , Océano Índico , Tanzanía , Kenia , Mozambique , Comoras , Historia del Siglo XV , Historia del Siglo XVI , Historia del Siglo XVII , India/etnología , Persia/etnología , Arabia/etnología , ADN Antiguo/análisis
4.
Int J Cancer ; 154(6): 1019-1028, 2024 Mar 15.
Artículo en Inglés | MEDLINE | ID: mdl-37961998

RESUMEN

In Mozambique, cervical cancer is the most frequent cancer in women. However, studies about cervical cancer treatment and prognosis are scarce. We describe the clinical characteristics, treatment and survival of patients with cervical cancer admitted to Maputo Central Hospital (MCH) in 2016 to 2018. Sociodemographic, clinical and cancer-related data were retrieved from clinical records of patients admitted to the Oncology Service of the MCH with an incident cervical cancer in 2016 to 2018 (n = 407). The Pathology Service database was used to obtain information regarding pathological diagnosis. Survival data was obtained through the MCH Cancer Registry and clinical records. Odds ratios for the association between patients' characteristics and the diagnosis of advanced stage cancer were computed using logistic regression. Survival analyses were performed using the Kaplan-Meier estimator. A total of 91.2% of the patients were diagnosed with advanced disease (stage IIB-IV) and squamous cell carcinoma was the predominant histological subtype. Most of the patients underwent chemotherapy (93.1%) but <7% were submitted to surgery, radiotherapy or brachytherapy. Those living with HIV had 3.4-fold higher odds of advanced disease. Overall survival was 72.7% (95% confidence interval [CI]: 67.9-77.0) at 1-year and 51.0% (95%CI: 45.3-56.3) at 2-years. Those with early stage (IA-IIA) and asymptomatic at diagnosis had a significantly higher 2-year overall survival. In Mozambique, cervical cancer is diagnosed mostly in advanced stages, resulting in poor prognosis. This highlights the importance of HPV vaccination and screening, to decrease the burden of cervical cancer in this context.


Asunto(s)
Neoplasias del Cuello Uterino , Humanos , Femenino , Neoplasias del Cuello Uterino/epidemiología , Neoplasias del Cuello Uterino/terapia , Mozambique/epidemiología , Pronóstico , Análisis de Supervivencia , Hospitales , Estadificación de Neoplasias , Estudios Retrospectivos
5.
PLoS Med ; 21(2): e1004334, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38377150

RESUMEN

BACKGROUND: World Health Organization (WHO) guidelines recommend cotrimoxazole prophylaxis for children who are HIV-exposed until infection is excluded and vertical transmission risk has ended. While cotrimoxazole has benefits for children with HIV, there is no mortality benefit for children who are HIV-exposed but uninfected, prompting a review of global guidelines. Here, we model the potential impact of alternative cotrimoxazole strategies on mortality in children who are HIV-exposed. METHODS AND FINDINGS: Using a deterministic compartmental model, we estimated mortality in children who are HIV-exposed from 6 weeks to 2 years of age in 4 high-burden countries: Côte d'Ivoire, Mozambique, Uganda, and Zimbabwe. Vertical transmission rates, testing rates, and antiretroviral therapy (ART) uptake were derived from UNAIDS data, trial evidence, and meta-analyses. We explored 6 programmatic strategies: maintaining current recommendations; shorter cotrimoxazole provision for 3, 6, 9, or 12 months; and starting cotrimoxazole only for children diagnosed with HIV. Modelled alternatives to the current strategy increased mortality to varying degrees; countries with high vertical transmission had the greatest mortality. Compared to current recommendations, starting cotrimoxazole only after a positive HIV test had the greatest predicted increase in mortality: Mozambique (961 excess annual deaths; excess mortality 339 per 100,000 HIV-exposed children; risk ratio (RR) 1.06), Uganda (491; 221; RR 1.04), Zimbabwe (352; 260; RR 1.05), and Côte d'Ivoire (125; 322; RR 1.06). Similar effects were observed for 3-, 6-, 9-, and 12-month strategies. Increased mortality persisted but was attenuated when modelling lower cotrimoxazole uptake, smaller mortality benefits, higher testing coverage, and lower vertical transmission rates. The study is limited by uncertain estimates of cotrimoxazole coverage in programmatic settings; an inability to model increases in mortality arising from antimicrobial resistance due to limited surveillance data in sub-Saharan Africa; and lack of a formal health economic analysis. CONCLUSIONS: Changing current guidelines from universal cotrimoxazole provision for children who are HIV-exposed increased predicted mortality across the 4 modelled high-burden countries, depending on test-to-treat cascade coverage and vertical transmission rates. These findings can help inform policymaker deliberations on cotrimoxazole strategies, recognising that the risks and benefits differ across settings.


Asunto(s)
Infecciones por VIH , Combinación Trimetoprim y Sulfametoxazol , Niño , Femenino , Humanos , Combinación Trimetoprim y Sulfametoxazol/uso terapéutico , Infecciones por VIH/diagnóstico , Madres , Zimbabwe/epidemiología , Mozambique/epidemiología
6.
Antimicrob Agents Chemother ; 68(7): e0034624, 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38771031

RESUMEN

While the Plasmodium falciparum malaria parasite continues to cause severe disease globally, Mozambique is disproportionally represented in malaria case totals. Acquisition of copy number variations (CNVs) in the parasite genome contributes to antimalarial drug resistance through overexpression of drug targets. Of interest, piperaquine resistance is associated with plasmepsin 2 and 3 CNVs (pfpmp2 and pfpmp3, respectively), while CNVs in the multidrug efflux pump, multidrug resistance-1 (pfmdr1), increase resistance to amodiaquine and lumefantrine. These antimalarials are partner drugs in artemisinin combination therapies (ACTs) and therefore, CNV detection with accurate and efficient tools is necessary to track ACT resistance risk. Here, we evaluated ~300 clinically derived samples collected from three sites in Mozambique for resistance-associated CNVs. We developed a novel, medium-throughput, quadruplex droplet digital PCR (ddPCR) assay to simultaneously quantify the copy number of pfpmp3, pfpmp2, and pfmdr1 loci in these clinical samples. By using DNA from laboratory parasite lines, we show that this nanodroplet-based method is capable of detecting picogram levels of parasite DNA, which facilitates its application for low yield and human host-contaminated clinical surveillance samples. Following ddPCR and the application of quality control standards, we detected CNVs in 13 of 229 high-quality samples (prevalence of 5.7%). Overall, our study revealed a low number of resistance CNVs present in the parasite population across all three collection sites, including various combinations of pfmdr1, pfpmp2, and pfpmp3 CNVs. The potential for future ACT resistance across Mozambique emphasizes the need for continued molecular surveillance across the region.


Asunto(s)
Antimaláricos , Variaciones en el Número de Copia de ADN , Resistencia a Medicamentos , Malaria Falciparum , Plasmodium falciparum , Proteínas Protozoarias , Antimaláricos/farmacología , Mozambique , Plasmodium falciparum/genética , Plasmodium falciparum/efectos de los fármacos , Humanos , Resistencia a Medicamentos/genética , Variaciones en el Número de Copia de ADN/genética , Malaria Falciparum/parasitología , Malaria Falciparum/tratamiento farmacológico , Proteínas Protozoarias/genética , Reacción en Cadena de la Polimerasa/métodos , Quinolinas/farmacología , Amodiaquina/farmacología , Proteínas Asociadas a Resistencia a Múltiples Medicamentos/genética , Ácido Aspártico Endopeptidasas/genética , Artemisininas/farmacología , Lumefantrina/farmacología , Piperazinas
7.
Malar J ; 23(1): 23, 2024 Jan 18.
Artículo en Inglés | MEDLINE | ID: mdl-38238774

RESUMEN

BACKGROUND: Different anopheline species (even within a species group/complex) can differ in their feeding and resting behaviours, which impact both malaria transmission patterns as well as the efficacy of vector control interventions. While morphological identification of sampled specimens is an important first step towards understanding species diversity and abundance, misidentification can result in the implementation of less effective vector control measures, and consequently smaller reductions in the number of local malaria cases. Focusing on southern Mozambique, a malaria pre-elimination area where malaria remains persistent, the aims of this preliminary study were to use molecular identification (CO1 and ITS2 barcoding) to (1) validate the results from the morphological identification (with a particular focus on Anopheles pharoensis and Anopheles squamosus), and (2) have a closer look at the Anopheles coustani group (which includes Anopheles tenebrosus and Anopheles ziemanni). METHODS: Female anopheline mosquitoes (n = 81) were identified morphologically and subsequently sequenced at the ribosomal DNA internal transcribed spacer region 2 (ITS2) and/or cytochrome oxidase subunit 1 (CO1) loci towards species determination. RESULTS: Out of the 62 specimens that were identified morphologically to species, 4 (6.5%) were misidentified. Regarding the An. coustani group, morphological identification showed that several members are present in southern Mozambique, including An. coustani sensu lato (s.l.), An. ziemanni and An. tenebrosus. However, based on both ITS2 and CO1 sequences, the exact species remains unknown for the latter two members until voucher sequences are available for comparison. CONCLUSION: The reason(s) for morphological misidentification of anopheline mosquitoes need to be mitigated. This is usually related to both the capacity (i.e. training) of the microscopist to identify anopheline species, and the information provided in the dichotomous identification key. As the An. coustani complex contributes to (residual) malaria transmission in sub-Saharan Africa, it may play a role in the observed persistent malaria in southern Mozambique. A better baseline characterizing of the local anophelines species diversity and behaviours will allow us to improve entomological surveillance strategies, better understand the impact of vector control on each local vector species, and identify new approaches to target those vector species.


Asunto(s)
Anopheles , Malaria , Animales , Femenino , Anopheles/genética , Mozambique , Mosquitos Vectores , Malaria/epidemiología , ADN Ribosómico , Complejo IV de Transporte de Electrones/genética
8.
Malar J ; 23(1): 87, 2024 Mar 27.
Artículo en Inglés | MEDLINE | ID: mdl-38532416

RESUMEN

BACKGROUND: The Magude Project assessed the feasibility of eliminating malaria in Magude district, a low transmission setting in southern Mozambique, using a package of interventions, including long-lasting insecticidal nets (LLINs). As the efficacy of LLINs depends in part on their physical integrity, this metric was quantified for Olyset® Nets post mass-distribution, in addition to net use, care and handling practices and other risk factors associated with net physical integrity. METHODS: Nets were collected during a cross-sectional net evaluation, nine months after the Magude project commenced, which was 2 years after the nets were distributed by the National Malaria Control Programme (NMCP). The physical integrity of the nets was assessed by counting and sizing the holes at different positions on each net. A structured questionnaire was administered to assess how the selected net was used and treated (care, wash and repair). Net bio-efficacy was assessed following the standard World Health Organization (WHO) cone bioassay procedures. RESULTS: Out of the 170 Olyset® Nets included in the analysis, 63.5% had been used the night before. The main reason for not using a net was the notion that there were no mosquitoes present. The average number of people using each net was 1.79. Two thirds of the nets had only been washed once or twice since distribution. Most nets (80.9%) were holed and 18% were torn, but none of the risk factors were significantly associated with net integrity, except for presence of mice in the household. Less than half of the participants noticed holes in holed nets, and of those only 38.6% attempted to repair those. None of the six nets that were tested for bio-efficacy passed the WHO threshold of 80% mosquito mortality. CONCLUSION: Overall the majority of Olyset® Nets were in serviceable condition two years post-distribution, but their insecticidal effect may have been lost. This study-together with previous evidence on suboptimal access to and use of LLINs in Magude district-highlights that LLINs as an intervention could have been optimized during the Magude project to achieve maximum intervention impact.


Asunto(s)
Culicidae , Mosquiteros Tratados con Insecticida , Insecticidas , Malaria , Humanos , Animales , Ratones , Estudios Transversales , Mozambique , Control de Mosquitos/métodos , Malaria/prevención & control
9.
Malar J ; 23(1): 137, 2024 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-38715035

RESUMEN

BACKGROUND: Universal coverage with insecticide-treated nets (ITNs) is important for malaria control and elimination. The emergence and intensification of insecticide resistance threatens progress made through the deployment of these interventions and has required the development of newer, more expensive ITN types. Understanding malaria prevention behaviour, including barriers and facilitators to net access and use, can support effective decision-making for the promotion and distribution of ITNs. METHODS: In-depth interviews and focus group discussions were conducted in 3 to 4 villages per district, in 13 districts across Burkina Faso, Mozambique, Nigeria and Rwanda from 2019 to 2022. Interviews were conducted in the local language, translated and transcribed in English, French or Portuguese. Transcripts were coded and analysed using Nvivo and ATLAS.ti. RESULTS: ITNs were obtained from mass distribution campaigns, antenatal care and immunization visits, and purchased on the private market in some locations. While there were divergent perspectives in whether the number of distributed nets were adequate, participants consistently expressed concerns of bias, discrimination, and a lack of transparency with the distribution process. ITNs were frequently used alongside other malaria prevention methods. The primary motivation for use was malaria prevention. While some participants reported using nets nightly throughout the year, other participants reported seasonal use, both due to the perceived higher density of mosquitoes and discomfort of sleeping under a net in the increased heat. Other barriers to consistent net use included activities that take place away from the home, sleeping patterns and arrangements, and sensitivity to the insecticides on the nets. CONCLUSIONS: ITNs remain an important malaria control intervention. To ensure adequate and increased net access, distribution campaigns should consider family structures, available sleeping spaces, and other bed sharing preferences when identifying the number of nets needed for distribution. In addition, campaigns should allow for multiple options for net distribution points and timing to accommodate households remote to health services. Continuous distribution channels and complimentary distribution through the private sector could help fill gaps in coverage. Solutions are needed for outdoor malaria transmission, including alternative designs for ITNs, and improving access to complementary personal protective measures.


Asunto(s)
Mosquiteros Tratados con Insecticida , Malaria , Control de Mosquitos , Mosquiteros Tratados con Insecticida/estadística & datos numéricos , Nigeria , Malaria/prevención & control , Burkina Faso , Control de Mosquitos/métodos , Control de Mosquitos/estadística & datos numéricos , Humanos , Mozambique , Femenino , Rwanda , Masculino , Adulto , Persona de Mediana Edad , Adulto Joven , Grupos Focales
10.
Malar J ; 23(1): 62, 2024 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-38419105

RESUMEN

BACKGROUND: Malaria elimination requires closely co-ordinated action between neighbouring countries. In Southern Africa several countries have reduced malaria to low levels, but the goal of elimination has eluded them thus far. The Southern Africa Development Community (SADC) Malaria Elimination Eight (E8) initiative was established in 2009 between Angola, Botswana, Eswatini, Mozambique, Namibia, South Africa, Zambia, and Zimbabwe to coordinate malaria interventions aiming to eliminate malaria by 2030. Cross-border coordination is important in malaria elimination settings as it strengthens surveillance, joint planning and implementation, knowledge exchange and optimal use of resources. This paper describes how this collaboration is realized in practice, its achievements and challenges, and its significance for malaria elimination prospects. METHODS: The ministers of health of the E8 countries oversee an intergovernmental technical committee supported by specialist working groups consisting of technical personnel from member countries and partner institutions. These technical working groups are responsible for malaria elimination initiatives in key focus areas such as surveillance, vector control, diagnosis, case management, behaviour change and applied research. The technical working groups have initiated and guided several collaborative projects which lay essential groundwork for malaria elimination. RESULTS: The E8 collaboration has yielded achievements in the following key areas. (1) Establishment and evaluation of malaria border health posts to improve malaria services in border areas and reduce malaria among resident and, mobile and migrant populations. (2) The development of a regional malaria microscopy slide bank providing materials for diagnostic training and proficiency testing. (3) A facility for regional external competency assessment and training of malaria microscopy trainers in collaboration with the World Health Organization. (4) Entomology fellowships that improved capacity in entomological surveillance; an indoor residual spraying (IRS) training of trainers' scheme to enhance the quality of this core intervention in the region. (5) Capacity development for regional malaria parasite genomic surveillance. (6) A mechanism for early detection of malaria outbreak through near real time reporting and a quarterly bulletins of malaria incidence in border districts. CONCLUSIONS: The E8 technical working groups system embodies inter-country collaboration of malaria control and elimination activities. It facilitates sustained interaction between countries through a regional approach. The groundwork for elimination has been laid, but the challenge will be to maintain funding for collaboration at this level whilst reducing reliance on international donors and to build capacities necessary to prepare for malaria elimination.


Asunto(s)
Malaria , Humanos , Malaria/epidemiología , Malaria/prevención & control , África Austral/epidemiología , Brotes de Enfermedades , Mozambique/epidemiología , Sudáfrica/epidemiología
11.
Malar J ; 23(1): 157, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38773567

RESUMEN

BACKGROUND: Perennial malaria chemoprevention (PMC) aims to protect children at risk from severe malaria by the administration of anti-malarial drugs to children of defined ages throughout the year. Sulfadoxine-pyrimethamine (SP) has been widely used for chemoprevention in Africa and a child-friendly dispersible tablet formulation has recently become available. METHODS: This qualitative non-interventional observational study was conducted in Benin, Côte d'Ivoire, and Mozambique between February and June 2022. Prototype blister packs, dispensing boxes and job aids designed to support dispersible SP deployment for PMC were evaluated using focus group discussions (FGD) and semi-structured in-depth individual interviews (IDI) with health authorities, health personnel, community health workers (CHWs) and caregivers. The aim was to evaluate knowledge and perceptions of malaria and chemoprevention, test understanding of the tools and identify gaps in understanding, satisfaction, user-friendliness and acceptability, and assess the potential role of CHWs in PMC implementation. Interviews were transcribed and imported to ATLAS.ti for encoding and categorization. Thematic content analysis used deductive and inductive coding with cross-referencing of findings between countries and participants to enrich data interpretation. Continuous comparison across the IDI and FGD permitted iterative, collaborative development of materials. RESULTS: Overall, 106 participants completed IDIs and 70 contributed to FGDs. Malaria was widely recognised as the most common disease affecting children, and PMC was viewed as a positive intervention to support child health. The role of CHWs was perceived differently by the target groups, with caregivers appreciating their trusted status in the community, whereas health authorities preferred clinic-based deployment of PMC by health professionals. Empirical testing of the prototype blister packs, dispensing boxes and job aids highlighted the context-specific expectations of respondents, such as familiar situations and equipment, and identified areas of confusion or low acceptance. A key finding was the need for a clear product identity reflecting malaria. CONCLUSION: Simple modifications profoundly affected the perception of PMC and influenced acceptability. Iterative quantitative investigation resulted in PMC-specific materials suited to the local context and socio-cultural norms of the target population with the aim of increasing access to chemoprevention in children most at risk of severe malaria.


Asunto(s)
Antimaláricos , Quimioprevención , Combinación de Medicamentos , Malaria , Pirimetamina , Mozambique , Benin , Malaria/prevención & control , Antimaláricos/administración & dosificación , Antimaláricos/uso terapéutico , Quimioprevención/métodos , Quimioprevención/estadística & datos numéricos , Humanos , Côte d'Ivoire , Pirimetamina/administración & dosificación , Pirimetamina/uso terapéutico , Sulfadoxina/administración & dosificación , Sulfadoxina/uso terapéutico , Preescolar , Femenino , Masculino , Embalaje de Medicamentos/métodos , Lactante , Niño , Adulto
12.
AIDS Behav ; 28(4): 1370-1383, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38151664

RESUMEN

Mozambique has one of the world's highest HIV/AIDS burdens. Despite significant investment in HIV care and treatment, pregnant and lactating women's retention in care remains suboptimal. One reason for poor maternal retention is lack of male partner support. We tested an interventional couple-based HIV care and treatment, including joint clinical appointments and couple-based educational and support sessions provided by a health counselor and peer educators, respectively. Healthcare providers delivering care for seroconcordant individuals were interviewed regarding their perspectives on facilitators and barriers to the couple-based intervention implementation. Analysis of interview responses was done using MAXQDA. Results pertaining to providers' perspectives on implementation and intervention characteristics were organized, interpreted, and contextualized using the Consolidated Framework for Implementation Research (CFIR 2.0), while providers' suggestions for improvements were coded and organized apart from CFIR. Providers felt the intervention was largely compatible with the local culture, and offered a significant advantage over standard individual-based care by facilitating patient follow-up and reducing wait times by prioritizing couples for services. They also believed it facilitated HIV treatment access through the provision of couple-based counseling that encouraged supportive behaviors towards retention. However, providers reported insufficient privacy to deliver couple-based care at some health facilities and concerns that women in difficult relationships may struggle to meaningfully participate. They suggested providing sessions in alternate clinic settings and offering a limited number of women-only visits. The facilitators and barriers described here contribute to informing the design and implementation of future couple-based interventions to improve HIV care for seroconcordant expectant couples.


Asunto(s)
Infecciones por VIH , Embarazo , Humanos , Masculino , Femenino , Infecciones por VIH/tratamiento farmacológico , Infecciones por VIH/epidemiología , Infecciones por VIH/prevención & control , Mozambique/epidemiología , Lactancia , Consejo , Personal de Salud/psicología , Investigación Cualitativa
13.
AIDS Care ; 36(1): 122-129, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37490699

RESUMEN

In Mozambique, women are the most affected by HIV/AIDS and heterosexual encounters remain the main route for HIV/AIDS. Condom use is the most effective method of HIV/AIDS prevention, and the intention to use and buy/get condoms has a significant role in safe sex behavior. This study aimed to evaluate the efficacy of two psychosocial interventions - the Didactic and ACCENT Interventions - to prevent HIV/AIDS among Mozambican Women. Participants were Mozambican women (n = 150), users of the gynecology clinic of the Central Hospital of Beira. The study design was a randomized controlled trial (RCT) with assignment to three groups: Didactic intervention, ACCENT intervention, and Control group. Measures were from an adaption of the Women's Health Questionnaire, which includes questions about sociodemographic, clinical, and behavioral variables related to HIV prevention/risk. There was a significant group effect on condom use and safer sex preparatory behaviors, F(2, 146) = 6.45, p = .002, with Bonferroni post-hoc tests showing differences between the ACCENT vs. Control groups and ACCENT vs. Didactic groups (all p = .022). There were no statistically significant time effects on both condom use and safer sex preparatory behaviors. Results are promising for HIV/AIDS prevention in Mozambican women at sexual risk, but replication is needed for generalizability of findings.


Asunto(s)
Síndrome de Inmunodeficiencia Adquirida , Infecciones por VIH , Femenino , Humanos , Síndrome de Inmunodeficiencia Adquirida/prevención & control , Mozambique , Infecciones por VIH/prevención & control , Infecciones por VIH/psicología , Intervención Psicosocial , Conducta Sexual/psicología , Condones , Factores de Riesgo , Conocimientos, Actitudes y Práctica en Salud
14.
BMC Infect Dis ; 24(1): 233, 2024 Feb 21.
Artículo en Inglés | MEDLINE | ID: mdl-38383310

RESUMEN

BACKGROUND: Tuberculosis (TB) is a major cause of mortality worldwide. Children and people living with HIV (PLHIV) have an increased risk of mortality, particularly in the absence of rapid diagnosis. The main challenges of diagnosing TB in these populations are due to the unspecific and paucibacillary disease presentation and the difficulty of obtaining respiratory samples. Thus, novel diagnostic strategies, based on non-respiratory specimens could improve clinical decision making and TB outcomes in high burden TB settings. We propose a multi-country, prospective diagnostic evaluation study with a nested longitudinal cohort evaluation to assess the performance of a new stool-based qPCR, developed by researchers at Baylor College of Medicine (Houston, Texas, USA) for TB bacteriological confirmation with promising results in pilot studies. METHODS: The study will take place in high TB/HIV burden countries (Mozambique, Eswatini and Uganda) where we will enroll, over a period of 30 months, 650 PLHIV (> 15) and 1295 children under 8 years of age (irrespective of HIV status) presenting pressumptive TB. At baseline, all participants will provide clinical history, complete a physical assessment, and undergo thoracic chest X-ray imaging. To obtain bacteriological confirmation, participants will provide respiratory samples (1 for adults, 2 in children) and 1 stool sample for Xpert Ultra MTB/RIF (Cepheid, Sunnyvale, CA, USA). Mycobacterium tuberculosis (M.tb) liquid culture will only be performed in respiratory samples and lateral flow lipoarabinomannan (LF-LAM) in urine following WHO recommendations. Participants will complete 2 months follow-up if they are not diagnosed with TB, and 6 months if they are. For analytical purposes, the participants in the pediatric cohort will be classified into "confirmed tuberculosis", "unconfirmed tuberculosis" and "unlikely tuberculosis". Participants of the adult cohort will be classified as "bacteriologically confirmed TB", "clinically diagnosed TB" or "not TB". We will assess accuracy of the novel qPCR test compared to bacteriological confirmation and Tb diagnosis irrespective of laboratory results. Longitudinal qPCR results will be analyzed to assess its use as treatment response monitoring. DISCUSSION: The proposed stool-based qPCR is an innovation because both the strategy of using a non-sputum based sample and a technique specially designed to detect M.tb DNA in stool. PROTOCOL REGISTRATION DETAILS: ClinicalTrials.gov Identifier: NCT05047315.


Asunto(s)
Infecciones por VIH , Mycobacterium tuberculosis , Tuberculosis Pulmonar , Tuberculosis , Adulto , Niño , Humanos , Esuatini , Infecciones por VIH/complicaciones , Infecciones por VIH/diagnóstico , Mozambique , Estudios Multicéntricos como Asunto , Estudios Prospectivos , Sensibilidad y Especificidad , Tuberculosis/diagnóstico , Tuberculosis Pulmonar/diagnóstico , Uganda
15.
BMC Infect Dis ; 24(1): 107, 2024 Jan 19.
Artículo en Inglés | MEDLINE | ID: mdl-38243223

RESUMEN

BACKGROUND: In 2020, the WHO-approved Molbio Truenat platform and MTB assays to detect Mycobacterium tuberculosis complex (MTB) and resistance to rifampicin directly on sputum specimens. This primary health care center-based trial in Mozambique and Tanzania investigates the effect of Truenat platform/MTB assays (intervention arm) combined with rapid communication of results compared to standard of care on TB diagnosis and treatment initiation for microbiologically confirmed TB at 7 days from enrolment. METHODS: The Tuberculosis Close the Gap, Increase Access, and Provide Adequate Therapy (TB-CAPT) CORE trial employs a pragmatic cluster randomized controlled design to evaluate the impact of a streamlined strategy for delivery of Truenat platform/MTB assays testing at primary health centers. Twenty-nine centers equipped with TB microscopy units were selected to participate in the trial. Among them, fifteen health centers were randomized to the intervention arm (which involves onsite molecular testing using Truenat platform/MTB assays, process process optimization to enable same-day TB diagnosis and treatment initiation, and feedback on Molbio platform performance) or the control arm (which follows routine care, including on-site sputum smear microscopy and the referral of sputum samples to off-site Xpert testing sites). The primary outcome of the study is the absolute number and proportion of participants with TB microbiological confirmation starting TB treatment within 7 days of their first visit. Secondary outcomes include time to bacteriological confirmation, health outcomes up to 60 days from first visit, as well as user preferences, direct cost, and productivity analyses. ETHICS AND DISSEMINATION: TB-CAPT CORE trial has been approved by regulatory and ethical committees in Mozambique and Tanzania, as well as by each partner organization. Consent is informed and voluntary, and confidentiality of participants is maintained throughout. Study findings will be presented at scientific conferences and published in peer-reviewed international journals. TRIAL REGISTRATION: US National Institutes of Health's ClinicalTrials.gov, NCT04568954. Registered 23 September 2020.


Asunto(s)
Mycobacterium tuberculosis , Tuberculosis , Humanos , Mozambique , Tanzanía , Tuberculosis/diagnóstico , Tuberculosis/tratamiento farmacológico , Tuberculosis/complicaciones , Rifampin/farmacología , Atención Primaria de Salud , Esputo/microbiología , Sensibilidad y Especificidad , Ensayos Clínicos Controlados Aleatorios como Asunto
16.
Health Econ ; 33(1): 82-106, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37792290

RESUMEN

In the context of the COVID-19 pandemic, we develop and test experimentally three phone-based interventions to increase vaccine acceptance in Mozambique. The first endorses the vaccine with a simple positive message. The second adds the activation of social memory on the country's success in eradicating wild polio with vaccination campaigns. The third further adds a structured interaction with the participant to develop a critical view toward misleading information and minimize the sharing of fake news. We find that combining the endorsement with the stimulation of social memory and the structured interaction increases vaccine acceptance and trust in institutions.


Asunto(s)
COVID-19 , Pandemias , Humanos , Pandemias/prevención & control , COVID-19/prevención & control , Mozambique , Confianza , Vacunación
17.
BMC Vet Res ; 20(1): 185, 2024 May 10.
Artículo en Inglés | MEDLINE | ID: mdl-38730389

RESUMEN

BACKGROUND: Members of the Anaplasmataceae family, such as the Anaplasma and Ehrlichia species, cause economic losses and public health risks. However, the exact economic impact has not been comprehensively assessed in Mozambique due to limited data available on its basic epidemiology. Therefore, we investigated the molecular occurrence and identity of Anaplasma and Ehrlichia spp. infecting beef cattle in Maputo province, Mozambique. METHODS: A total of 200 whole blood samples were collected from apparently healthy beef cattle. Whole blood DNA was extracted and tested for presence of Anaplasma spp. and Ehrlichia ruminantium DNA through amplification of the 16S rRNA and map1 genes. Positive samples to Anaplasma spp. were subject to PCR assay targeting the A. marginale-msp5 gene. Amplicons obtained were purified, sequenced and subject to phylogenetic analyses. RESULTS: Anaplasma spp., A. marginale and E. ruminantium were detected in 153 (76.5%), 142 (71%) and 19 (9.5%) of all the samples analyzed, respectively. On this same sample group, 19 (9.5%) were co-infected with A. marginale and E. ruminantium. The 16S rRNA sequences of Anaplasma spp. obtained were phylogenetically related to A. marginale, A. centrale and A. platys. Phylogenetic analysis revealed that A. marginale-msp5 nucleotide sequences were grouped with sequences from Asia, Africa and Latin America, whereas E. ruminantium-map1 DNA nucleotide sequences were positioned in multiple clusters. CONCLUSION: Cattle in Maputo Province are reservoirs for multiple Anaplasma species. A high positivity rate of infection by A. marginale was observed, as well as high genetic diversity of E. ruminantium. Furthermore, five new genotypes of E. ruminantium-map1 were identified.


Asunto(s)
Anaplasma marginale , Anaplasmosis , Enfermedades de los Bovinos , Ehrlichia ruminantium , Ehrlichiosis , Filogenia , ARN Ribosómico 16S , Animales , Mozambique/epidemiología , Bovinos , Anaplasmosis/epidemiología , Anaplasmosis/microbiología , Enfermedades de los Bovinos/microbiología , Enfermedades de los Bovinos/epidemiología , ARN Ribosómico 16S/genética , Ehrlichiosis/veterinaria , Ehrlichiosis/epidemiología , Ehrlichiosis/microbiología , Ehrlichiosis/diagnóstico , Anaplasma marginale/genética , Anaplasma marginale/aislamiento & purificación , Ehrlichia ruminantium/genética , Ehrlichia ruminantium/aislamiento & purificación , ADN Bacteriano/genética , Proteínas de la Membrana Bacteriana Externa/genética , Reacción en Cadena de la Polimerasa/veterinaria
18.
BMC Pregnancy Childbirth ; 24(1): 165, 2024 Feb 26.
Artículo en Inglés | MEDLINE | ID: mdl-38408915

RESUMEN

BACKGROUND: The Ministry of Health of Mozambique (MISAU) and the World Health Organization (WHO) recommend enhancing pregnant women's satisfaction with health care services in order to advance maternal and child health. This study aims to assess the levels and determinants of pregnant women's satisfaction regarding their interactions with antenatal care (ANC) providers, the services of which were provided at the primary health care level in southern Mozambique. METHODOLOGY: We conducted an observational, quantitative, and cross-sectional study from November 4 to December 10, 2021. A structured questionnaire was administered to pregnant women who attended ANC during that period. The characteristics of the participants were illustrated using descriptive statistics; to analyse pregnant women's satisfaction determinants, we estimated crude and adjusted odds ratios (AOR) and 95% confidence intervals (95% CI) using logistic regression models. All analyses were performed in SPSS version 24 using a 5% significance level. RESULTS: We selected 951 pregnant women with a mean age of 25 years old; 14% attained a secondary educational level, 36% were married or living in a marital relationship, and 85.9% reported being satisfied with their current ANC. Factors that reduced the odds of being satisfied were the following: an "insufficient" ANC duration (AOR = 0.173; 95% CI: 0.079, 0.381); inadequate ANC waiting area (AOR = 0.479; 95% CI: 0.265, 0.863); women's perception about the existing norm of nonattendance in case of late arrival to the ANC (AOR = 0.528; 95% CI 0.292, 0.954); the perception of the existing norm that women are obliged to give birth in same health facility where ANC occurred (AOR = 0.481; 95% CI: 0.273, 0.846); and the perception that delivered ANC is not important for foetal health (AOR = 0.030; 95% CI:0.014, 0.066). CONCLUSIONS: Most of the pregnant women mentioned being satisfied with the ANC they received. The perception of short consultation duration, inadequate waiting spaces, strict linkage rules to specific health facilities and ANC norms, the perception that the received ANC is not relevant for foetal well-being are determinants of not being satisfied with ANC, and these determinants can be addressed by reorganizing ANC and, indeed, are modifiable by the improved paced implementation of the MISAU strategies for quality maternal and child health care.


Asunto(s)
Mujeres Embarazadas , Atención Prenatal , Niño , Embarazo , Femenino , Humanos , Adulto , Estudios Transversales , Mozambique , Satisfacción Personal , Atención Primaria de Salud , Etiopía
19.
BMC Public Health ; 24(1): 1185, 2024 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-38678173

RESUMEN

BACKGROUND: Men who have sex with Men (MSM) are known to contribute to increased HIV prevalence as an integral part of key populations with high vulnerability to HIV/AIDS due to their sexual behaviours. Mozambique conducted two rounds of bio-behavioral surveys (BBS) in this population with the main objective of estimating HIV prevalence and associated risk behaviors among MSM in Mozambique. The present study aims to estimate the trend of HIV prevalence and determine the correlations of HIV infection among MSM. METHODS: A repeated cross-sectional analytical study was conducted from secondary data from the first and second rounds of BBS in Mozambique conducted in 2011 and 2020-2021 respectively. Each round used a similar methodology which allowed for comparison between the two surveys. Chi-square test and logistic regression was used to compare the HIV prevalence between the BBS rounds, identify factors associated with HIV, and assess changes in HIV prevalence across selected risk factors. RESULTS: There was a significant increase in HIV prevalence among MSM (7.1-14.9%), living in Maputo (9.3-14.7%), uncircumcised (11.7-25.1%), and those who reported two sexual partners in the last year (5.2-14.4%). In contrast, there was a decrease in prevalence among adult MSM aged between 25 and 29 years (24.7-13.9%), aged 30 years or older (45.7-27.7%), married (29.1-16.8%), with higher education (16.7-5.9%) and moderate perception of HIV risk (10.9-3.4%). Multivariable analysis showed that factors such as age, marital status, religion, sexual identity, circumcision, and the use of lubrication during anal sex are significantly associated with the risk of HIV infection. CONCLUSIONS: This study underscores the continuing need for HIV prevention and education efforts. The rise in prevalence among specific population segments and the sustained presence of risk factors emphasize the requirement for holistic strategies tailored to the unique requirements of each subgroup. Understanding trends and risk factors is crucial to guiding public health policies and designing efficacious prevention programs that aim to curtail HIV transmission while enhancing the well-being of those impacted by the condition.


Asunto(s)
Infecciones por VIH , Homosexualidad Masculina , Humanos , Masculino , Mozambique/epidemiología , Infecciones por VIH/epidemiología , Adulto , Estudios Transversales , Prevalencia , Homosexualidad Masculina/estadística & datos numéricos , Homosexualidad Masculina/psicología , Factores de Riesgo , Adulto Joven , Adolescente , Persona de Mediana Edad , Salud Pública , Asunción de Riesgos
20.
BMC Public Health ; 24(1): 1189, 2024 Apr 27.
Artículo en Inglés | MEDLINE | ID: mdl-38678255

RESUMEN

BACKGROUND: Vitamin A deficiency (VAD) is a leading contributor to the poor health and nutrition of young children in sub-Saharan Africa. Funding constraints are compelling many countries to shift from longstanding campaigns to integrating vitamin A supplementation (VAS) into routine health services. We assessed child VAS coverage and associated factors for integrated delivery systems in Mozambique, Senegal, and Sierra Leone and for a campaign-based delivery strategy in Tanzania. METHODS: Data were obtained using representative household surveys administered to primary caregivers of N = 16,343 children aged 6-59 months (Mozambique: N = 1,659; Senegal: N = 7,254; Sierra Leone: N = 4,149; Tanzania: N = 3,281). Single-dose VAS coverage was assessed and bivariate and multivariable associations were examined for child VAS receipt with respect to rural or urban residence; child age and sex; maternal age, education, and VAS program knowledge; and household wealth. RESULTS: VAS coverage for children aged 6-59 months was 42.8% (95% CI: 40.2, 45.6) in Mozambique, 46.1% (95% CI: 44.9, 47.4) in Senegal, 86.9% (95% CI: 85.8, 87.9) in Sierra Leone, and 42.4% (95% CI: 40.2, 44.6) in Tanzania and was significantly higher for children 6-11 vs. 24-59 months in Mozambique, Senegal, and Tanzania. In Sierra Leone, children aged 12-23 months (aOR = 1.86; 95% CI: 1.20, 2.86) and 24-59 months (aOR = 1.55; 95% CI: 1.07, 2.25) were more likely to receive VAS, compared to those 6-11 months. Maternal awareness of VAS programs was associated with higher uptake in Mozambique (aOR = 4.00; 95% CI: 2.81, 5.68), Senegal (aOR = 2.72; 95% CI: 2.35, 3.15), and Tanzania (aOR = 14.50; 95% CI: 10.98, 19.17). Increased household wealth was associated with a higher likelihood of child VAS in Senegal and Tanzania. CONCLUSIONS: Our findings indicate routine delivery approaches for VAS are not achieving the level of coverage needed for public health impact in these settings. Intensive outreach efforts contributed to the higher coverage in Sierra Leone and highlight the importance of reducing the burdens associated with seeking supplementation at health facilities. As countries move towards incorporating VAS into routine health services, the essentiality of informed communities and potential losses for older children and socio-economically disadvantaged populations are key considerations in the sub-Saharan African context.


Asunto(s)
Suplementos Dietéticos , Deficiencia de Vitamina A , Vitamina A , Humanos , Lactante , Femenino , Masculino , Preescolar , Suplementos Dietéticos/estadística & datos numéricos , África del Sur del Sahara , Deficiencia de Vitamina A/prevención & control , Deficiencia de Vitamina A/tratamiento farmacológico , Deficiencia de Vitamina A/epidemiología , Vitamina A/administración & dosificación , Vitamina A/uso terapéutico , Prestación Integrada de Atención de Salud , Adulto , Promoción de la Salud/métodos , Mozambique
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA