Stool Xpert MTB/RIF as a possible diagnostic alternative to sputum in Africa: a systematic review and meta-analysis.

Introduction: Worldwide, COVID-19 pandemic lead to a large fall in the number of newly reported TB cases. In sub-Saharan Africa, microbiological diagnosis of TB is generally based on smear microscopy and Xpert MTB/RIF on sputum samples, but good quality sputum samples are often difficult to obtain, leading clinicians to rely on more invasive procedures for diagnosis. Aim of this study was to investigate pooled sensitivity and specificity of Xpert MTB/RIF on stool samples compared to respiratory microbiological reference standards in African countries. Methods: Four investigators independently searched PubMed, SCOPUS, and Web of Science until 12th October 2022, then screened titles and abstracts of all potentially eligible articles. The authors applied the eligibility criteria, considered the full texts. All the studies reported the data regarding true positive (TP), true negative (TN), false positive (FP) and false negative (FN). Risk of bias and applicability concerns were assessed with the Quadas-2 tool. Results: overall, among 130 papers initially screened, we evaluated 47 works, finally including 13 papers for a total of 2,352 participants, mainly children. The mean percentage of females was 49.6%, whilst the mean percentage of patients reporting HIV was 27.7%. Pooled sensitivity for Xpert MTB/RIF assay for detecting pulmonary tuberculosis was 68.2% (95%CI: 61.1-74.7%) even if characterized by a high heterogeneity (I2=53.7%). Specificity was almost 100% (99%, 95%CI: 97-100%; I2 = 45.7%). When divided for reference standard, in the six studies using sputum and nasogastric aspirate the accuracy was optimal (AUC = 0.99, SE = 0.02), whilst in the studies using only sputum for tuberculosis detection the AUC was 0.85 (with a SE = 0.16). The most common source of bias was exclusion of enrolled patients in the analysis. Conclusions: Our study confirms that, in Africa, stool Xpert MTB/RIF may be a useful rule-in test for children above and below 5 years of age under evaluation for pulmonary tuberculosis. Sensitivity increased substantially when using both sputum and nasogastric aspirate as reference samples.

Barriers and facilitators of HPV vaccination in sub-saharan Africa: a systematic review.

BACKGROUND: Human Papilloma Virus (HPV) is the most common sexually transmitted infection worldwide. Globally, both men and women have a 50% risk of being infected at least once in their life. HPV prevalence is among the highest in sub-Saharan Africa (SSA), at an average of 24%. HPV causes different types of cancers, including cervical cancer (CC), which is the leading cause of cancer deaths among women in SSA. HPV-vaccination has been proven to be effective in reducing HPV induced cancers. SSA countries are delayed in reaching the WHO's target of fully vaccinating 90% of girls within the age of 15 by 2030. Our systematic review aims to identify barriers and facilitators of HPV-vaccination in SSA to inform national implementation strategies in the region. METHODS: This is a mixed method systematic review based on the PRISMA statement and The Joanna Briggs Institute Reviewers' Manual. Search strategies were adapted to each selected database: PubMed/MEDLINE, Livivo, Google Scholar, Science Direct, and African Journals Online for papers published in English, Italian, German, French and Spanish between 1 December 2011 and 31 December 2021. Zotero and Rayyan were the software used for data management. The appraisal was conducted by three independent reviewers. RESULTS: A total of 20 articles were selected for appraisal from an initial 536 articles. Barriers included: limited health system capacities, socio-economic status, stigma, fear and costs of vaccines, negative experience with vaccinations, COVID-19 pandemic, lack of correct information, health education (HE) and consent. Additionally, we found that boys are scarcely considered for HPV-vaccination by parents and stakeholders. Facilitators included: information and knowledge, policy implementation, positive experience with vaccinations, HE, stakeholders' engagement, women's empowerment, community engagement, seasonality, and target-oriented vaccination campaigns. CONCLUSIONS: This review synthesizes barriers and facilitators of HPV-vaccinations in SSA. Addressing these can contribute to the implementation of more effective HPV immunization programs targeted at eliminating CC in line with the WHO 90/70/90 strategy. REGISTRATION AND FUNDING: Protocol ID: CRD42022338609 registered in the International Prospective Register of Systematic Reviews (PROSPERO). Partial funds: German Centre for Infection research (DZIF) project NAMASTE: 8,008,803,819.

Barriers and facilitators to anti-retroviral therapy adherence among adolescents aged 10 to 19 years living with HIV in sub-Saharan Africa: A mixed-methods systematic review and meta-analysis.

BACKGROUND: Human Immunodeficiency Virus (HIV) significantly affects adolescents globally, with the sub-Saharan Africa (SSA) reporting a high burden of the disease. HIV testing, treatment, and retention to care are low among adolescents. We conducted a mixed-method systematic review to assess anti-retroviral therapy (ART) adherence; barriers and facilitators to ART adherence and ART outcomes among adolescents living with HIV and on ART in sub-Saharan Africa. METHODS: We conducted searches in four scientific databases for studies conducted between 2010 and March 2022 to identify relevant primary studies. Studies were screened against inclusion criteria and assessed for quality, and data was extracted. Meta-analysis of rates and odd ratios was used to plot the quantitative studies and meta-synthesis summarized the evidence from qualitative studies. RESULTS: A total of 10 431 studies were identified and screened against the inclusion/ exclusion criteria. Sixty-six studies met the inclusion criteria (41 quantitative, 16 qualitative, and 9 mixed-methods study designs). Fifty-three thousand two hundred and seventeen (53 217) adolescents (52 319 in quantitative studies and 899 in qualitative studies) were included in the review. Thirteen support focused interventions for improved ART adherence were identified from quantitative studies. The plotted results from the meta-analysis found an ART adherence rate of 65% (95%CI 56-74), viral load suppression was 55% (95%CI 46-64), un-suppressed viral load rate of 41% (95%CI 32-50), and loss to follow up of 17% (95%CI 10-24) among adolescents. Meta-synthesis found six themes of barriers to ART (social, patient-based, economic, health system-based, therapy-based, and cultural barriers) in both the qualitative and quantitative studies, and three themes of facilitators to ART were also identified (social support, counselling, and ART education and secrecy or confidentiality) from qualitative studies. CONCLUSION: ART adherence remains low among adolescents in SSA despite multiple interventions implemented to improve ART adherence. The low adherence rate may hinder the attainment of the UNAIDS 2030 targets. Additionally, various barriers to ART adherence due to lack of support have been reported among this age group. However, interventions aimed at improving social support, educating, and counselling adolescents may improve and sustain ART adherence. TRIAL REGISTRATION: Systematic review registration: PROSPERO CRD42021284891.

Hybrid discrete-time-continuous-time models and a SARS CoV-2 mystery: Sub-Saharan Africa's low SARS CoV-2 disease burden.

Worldwide, the recent SARS-CoV-2 virus has infected more than 670 million people and killed nearly 67.0 million. In Africa, the number of confirmed COVID-19 cases was approximately 12.7 million as of January 11, 2023, that is about 2% of the infections around the world. Many theories and modeling techniques have been used to explain this lower-than-expected number of reported COVID-19 cases in Africa relative to the high disease burden in most developed countries. We noted that most epidemiological mathematical models are formulated in continuous-time interval, and taking Cameroon in Sub-Saharan Africa, and New York State in the USA as case studies, in this paper we developed parameterized hybrid discrete-time-continuous-time models of COVID-19 in Cameroon and New York State. We used these hybrid models to study the lower-than-expected COVID-19 infections in developing countries. We then used error analysis to show that a time scale for a data-driven mathematical model should match that of the actual data reporting.

Antimicrobial stewardship in the era of the COVID-19 pandemic: A systematic review protocol on the opportunities and challenges for Sub-Saharan Africa.

BACKGROUND: Antimicrobial resistance (AMR) remains one of the leading threats to global public health and this may increase following COVID-19 pandemic. This is particularly the case in Africa where regulations on antimicrobial usage are weak. This protocol outlines the steps to undertake a systematic review to synthesize evidence on drivers of AMR and evaluate existing approaches to strengthening antimicrobial stewardship (AMS) programs in Sub-Saharan Africa (SSA). On the basis of the evidence generated from the evidence synthesis, the overarching goal of this work is to provide recommendations to support best practices in AMS implementation in SSA. METHODS: A systematic search will be conducted using the following databases: Global Health Library, PubMed, Cumulative Index to Nursing and Allied Health Literature, Scopus, Google Scholar, Global Health, Embase, African Journals Online Library, Web of Science, antimicrobial databases (WHO COVID-19, TrACSS, NDARO, and JPIAMR), and the Cochrane databases for systematic reviews. Studies will be included if they assess AMR and AMS in SSA from January 2000 to January 31, 2023. RESULTS: The primary outcomes will include the drivers of AMR and approaches to AMS implementation in SSA. The Preferred Reporting Items for Systematic Reviews and Meta-analyses will guide the reporting of this systematic review. CONCLUSIONS: The findings are expected to provide evidence on best practices and resource sharing for policy consideration to healthcare providers and other stakeholders both at the local and international levels. Additionally, the study seeks to establish drivers specific to AMR during the COVID-19 era in the SSA, for example, with the observed increasing trend of antimicrobial misuse during the first or second year of the pandemic may provide valuable insights for policy recommendation in preparedness and response measures to future pandemics. PROSPERO REGISTRATION NUMBER: CRD42022368853.

The association between HIV diagnosis disclosure and adherence to anti-retroviral therapy among adolescents living with HIV in Sub-Saharan Africa: A systematic review and meta-analysis.

INTRODUCTION: Nine in ten of the world's 1.74 million adolescents living with human immunodeficiency virus (ALHIV) live in Sub-Saharan Africa. Suboptimal adherence to antiretroviral therapy (ART) and poor viral suppression are important problems among adolescents. To guide intervention efforts in this regard, this review presented pooled estimates on the prevalence of adherence and how it is affected by disclosure of HIV status among ALHIV in Sub-Saharan Africa. METHODS: A comprehensive search in major databases (Excerpta Medica database (EMBASE), PubMed, Ovid/MEDLINE, HINARI, and Google Scholar) with additional hand searches for grey literature was conducted to locate observational epidemiologic studies published in English up to November 12, 2022 with the following inclusion criteria: primary studies that reported disclosure of HIV status as an exposure variable, had positive adherence to ART as an outcome, and conducted among adolescents and children. The COVIDENCE software was used for a title/abstract screening, full-text screening, the JBI quality assessment checklist, and data extraction. Random effects model was used to pool estimates. Furthermore, sensitivity analysis and subgroup analysis were also conducted by age groups and type of adherence measures used. RESULTS: This meta-analysis combines the effect estimates from 12 primary studies with 4422 participants. The prevalence of good adherence to ART was 73% (95% CI (confidence interval): 56 to 87; I2 = 98.63%, P = <0.001), and it was higher among adolescents who were aware of their HIV status, 77% (95% CI: 56 to 92; I2 = 98.34%, P = <0.001). Overall, knowledge of HIV status was associated with increased odds of adherence (odds ratio (OR) = 1.88, 95% CI: 1.21 to 2.94; I2 = 79.8%, P = <0.001). This was further supported in a subgroup analysis by age (seven studies, pooled OR = 1.89, 95% CI: 1.06 to 3.37; I2 = 81.3%, P = <0.0001) and whether primary studies controlled for confounding factors (six studies provided adjusted estimates, pooled OR = 2.61, 95% CI: 1.22 to 5.57; I2 = 88.1%, P = <0.001) confirmed this further. CONCLUSIONS: Our meta-analysis and systematic review revealed that knowledge of one's HIV status was associated with adherence to ART, particularly among adolescents. The findings underscored the importance of encouraging disclosure in order to enhance adherence among adolescents.

Comprehensive HIV/AIDS knowledge and HIV testing among men in sub-Saharan Africa: a multilevel modelling.

This study investigated the association between comprehensive HIV/AIDS knowledge and HIV testing among men in sub-Saharan Africa (SSA). Data were taken from the most recent (2010-2019) Demographic and Health Survey men's recode files of 29 countries in SSA. A total of 104,398 men who had complete information on all the variables of interest were included in the study. The outcome variable was HIV testing. A multilevel logistic regression analysis was conducted to determine the association between comprehensive HIV/AIDS knowledge and HIV testing. The results of the fixed effects model were presented as adjusted odds ratios (AORs) with 95% confidence intervals (CIs). The average prevalences of HIV testing and comprehensive HIV/AIDS knowledge among men in SSA were 53.5% and 50.8% respectively. Rwanda and Niger recorded the highest (93.6%) and lowest prevalences (9.8%) respectively. The prevalence of comprehensive HIV/AIDS knowledge among men in the 29 countries was 50.8%, with the highest in Rwanda (76.4%) and the lowest in Benin (31.1%). Men who had no comprehensive HIV/AIDS knowledge were less likely to test for HIV compared with those who had comprehensive HIV/AIDS knowledge (AOR=0.59, CI: 0.57-0.60). Men who were older than 20 years, married or cohabiting, with at least secondary education, in the richest wealth quintile, exposed to mass media, used condoms and with multiple sexual partners were more likely to test for HIV. To improve HIV testing among men in SSA, this study recommends that policymakers and stakeholders step up comprehensive HIV/AIDS knowledge sensitization and education using effective tools such as mass media.

Assessment of integrated patterns of human-animal-environment health: a holistic and stratified analysis.

BACKGROUND: Data-driven research is a very important component of One Health. As the core part of the global One Health index (GOHI), the global One Health Intrinsic Drivers index (IDI) is a framework for evaluating the baseline conditions of human-animal-environment health. This study aims to assess the global performance in terms of GOH-IDI, compare it across different World Bank regions, and analyze the relationships between GOH-IDI and national economic levels. METHODS: The raw data among 146 countries were collected from authoritative databases and official reports in November 2021. Descriptive statistical analysis, data visualization and manipulation, Shapiro normality test and ridge maps were used to evaluate and identify the spatial and classificatory distribution of GOH-IDI. This paper uses the World Bank regional classification and the World Bank income groups to analyse the relationship between GOH-IDI and regional economic levels, and completes the case studies of representative countries. RESULTS: The performance of One Health Intrinsic Driver in 146 countries was evaluated. The mean (standard deviation, SD) score of GOH-IDI is 54.05 (4.95). The values (mean SD) of different regions are North America (60.44, 2.36), Europe and Central Asia (57.73, 3.29), Middle East and North Africa (57.02, 2.56), East Asia and Pacific (53.87, 5.22), Latin America and the Caribbean (53.75, 2.20), South Asia (52.45, 2.61) and sub-Saharan Africa (48.27, 2.48). Gross national income per capita was moderately correlated with GOH-IDI (R2 = 0.651, Deviance explained = 66.6%, P < 0.005). Low income countries have the best performance in some secondary indicators, including Non-communicable Diseases and Mental Health and Health risks. Five indicators are not statistically different at each economic level, including Animal Epidemic Disease, Animal Biodiversity, Air Quality and Climate Change, Land Resources and Environmental Biodiversity. CONCLUSIONS: The GOH-IDI is a crucial tool to evaluate the situation of One Health. There are inter-regional differences in GOH-IDI significantly at the worldwide level. The best performing region for GOH-IDI was North America and the worst was sub-Saharan Africa. There is a positive correlation between the GOH-IDI and country economic status, with high-income countries performing well in most indicators. GOH-IDI facilitates researchers' understanding of the multidimensional situation in each country and invests more attention in scientific questions that need to be addressed urgently.

Sub-Saharan African communities' experiences and engagement with COVID-19 and the related control strategies in Antwerp, Belgium.

BACKGROUND: Pre-existing racial/ethnic disparities in health, sustained by intersecting socio-economic and structural inequities, have widened due to the COVID-19 pandemic. Yet, little attention has been paid to the lived experiences of people in ethnic/racialised minority communities, and to the causes and effects underlying the COVID-19-related burden. This hinders tailored responses. This study explores Sub-Saharan African (SSA) communities' needs, perceptions, and experiences of the COVID-19 pandemic and its control measures in Antwerp (Belgium) in 2020. METHODS: This qualitative study using an interpretative ethnographical approach adopted an iterative and participatory methodology: a community advisory board advised on all stages of the research process. Interviews and a group discussion were conducted online, through telephone, and face-to-face. We analysed the data inductively using a thematic analytical approach. RESULTS: Our respondents, who mostly used social media for information, struggled with misinformation about the new virus and prevention measures. They reported to be vulnerable to misinformation about the origin of the pandemic, risk of infection with SARS-CoV-2, and the prevention measures. Not only did the epidemic affect SSA communities, but to a larger extent, the control strategies did-especially the lockdown. Respondents perceived the interaction of social factors (i.e. being migrants, being undocumented, having experienced racism and discrimination) and economic factors (i.e. working in temporary and precarious jobs, not being able to apply for unemployment benefit, crowded housing conditions) as increasing the burden of COVID-19 control measures. In turn, these experiences influenced people's perceptions and attitudes, and may have partially impaired them to follow some public health COVID-19 prevention guidelines. Despite these challenges, communities developed bottom-up initiatives to react quickly to the epidemic, including translation of prevention messages, food distribution, and online spiritual support. CONCLUSION: Pre-existing disparities influenced the perceptions of and attitudes towards COVID-19 and its control strategies among SSA communities. To better design support and control strategies targeted to specific groups, we need to not only involve communities and address their specific needs and concerns, but also build on their strengths and resilience. This will remain important in the context of widening disparities and future epidemics.

Integrated approaches to COVID-19 emergency response in fragile, conflict-affected and vulnerable settings: a public health policy brief.

In the absence of fully effective measures to prevent and treat COVID-19, the limited access to and hesitancy about vaccines, the prolongation of the on-going pandemic is likely. This underscores the need to continue to respond and maintain preparedness, preferably using a more sustainable approach. A sustainable management is particularly important in fragile, conflict-affected and vulnerable countries of sub-Saharan Africa given several peculiar challenges. This Viewpoint proposes policy options to guide transitioning from current COVID-19 emergency response interventions to longer-term and more sustainable responses in such settings. In the long term, a shift in policy from a vertical to a more effective approach should integrate response coordination, surveillance, case management, risk communication and operational support, among other elements, for better results. We call on public health policymakers, partners and donors to support full implementation of these policy options in a holistic manner to encompass all emerging public health threats.

A multi-country phase 2 study to evaluate the suitcase lab for rapid detection of SARS-CoV-2 in seven Sub-Saharan African countries: Lessons from the field.

BACKGROUND: The COVID-19 pandemic led to severe health systems collapse, as well as logistics and supply delivery shortages across sectors. Delivery of PCR related healthcare supplies continue to be hindered. There is the need for a rapid and accessible SARS-CoV-2 molecular detection method in low resource settings. OBJECTIVES: To validate a novel isothermal amplification method for rapid detection of SARS-CoV-2 across seven sub-Sharan African countries. STUDY DESIGN: In this multi-country phase 2 diagnostic study, 3,231 clinical samples in seven African sites were tested with two reverse transcription Recombinase-Aided Amplification (RT-RAA) assays (based on SARS-CoV-2 Nucleocapsid (N) gene and RNA-dependent RNA polymerase (RdRP) gene). The test was performed in a mobile suitcase laboratory within 15 min. All results were compared to a real-time RT-PCR assay. Extraction kits based on silica gel or magnetic beads were applied. RESULTS: Four sites demonstrated good to excellent agreement, while three sites showed fair to moderate results. The RdRP gene assay exhibited an overall PPV of 0.92 and a NPV of 0.88. The N gene assay exhibited an overall PPV of 0.93 and a NPV 0.88. The sensitivity of both RT-RAA assays varied depending on the sample Ct values. When comparing sensitivity between sites, values differed considerably. For high viral load samples, the RT-RAA assay sensitivity ranges were between 60.5 and 100% (RdRP assay) and 25 and 98.6 (N assay). CONCLUSION: Overall, the RdRP based RT-RAA test showed the best assay accuracy. This study highlights the challenges of implementing rapid molecular assays in field conditions. Factors that are important for successful deployment across countries include the implementation of standardized operation procedures, in-person continuous training for staff, and enhanced quality control measures.

COVID in Africa, one year later.

This paper presents an update of last year analysis of COVID in sub-Sahara Africa (SSA). The number of confirmed cases and deaths has dramatically increased, partially driven by the expanded diagnostic capacity, but it is an unknown undercount of people infected: we are blind with respect to the real size of the pandemic. The aggregate numbers mask a substantial heterogeneity: South Africa accounts for almost half of the cases in the region; Ethiopia, the second top country in the ranking, follows from afar, with only 6% of reported cases. There are signs that the third wave of COVID, driven by the more transmissible Delta variant, is easing off.The concerns that the pandemic would have affected more severely the most vulnerable populations (refugees and internally displaced persons) have not been confirmed: there is no evidence of hospitals overwhelmed nor of high mortality in humanitarian settings, a pattern that has not found an explanation.As of now, only 1% of African has been vaccinated, a sign of vaccine inequity and of 'a catastrophic moral failure' of rich countries, which have secured a surplus of hundred million COVID vaccines that they cannot use.The combined effects of the pandemic and control measures have been particularly severe in SSA economies, where underemployment and job insecurity prevail. Reduced export of commodities, collapse of tourism and agriculture, decline of foreign investment, aid, and remittances have driven million Africans in extreme poverty. The international financial institutions have shifted their strategies from austerity to a strong package of grants and concessional loans to support poor countries, including those in SSA, to cope with the immediate consequences of the pandemic, under the lemma 'vaccine policy is the most important economic policy'.

Quality intrapartum care expectations and experiences of women in sub-Saharan African Low and Low Middle-Income Countries: a qualitative meta-synthesis.

BACKGROUND: Woman-centred maternity care is respectful and responsive to women's needs, values, and preferences. Women's views and expectations regarding the quality of health services during pregnancy and childbirth vary across settings. Despite the need for context-relevant evidence, to our knowledge, no reviews focus on what women in sub-Saharan African Low and Low Middle-Income Countries (LLMICs) regard as quality intrapartum care that can inform quality guidelines in countries. METHODS: We undertook a qualitative meta-synthesis using a framework synthesis to identify the experiences and expectations of women in sub-Saharan African LLMICs with quality intrapartum care. Following a priori protocol, we searched eight databases for primary articles using keywords. We used Covidence to collate citations, remove duplicates, and screen articles using a priori set inclusion and exclusion criteria. Two authors independently screened first the title and abstracts, and the full texts of the papers. Using a data extraction excel sheet, we extracted first-order and second-order constructs relevant to review objectives. The WHO framework for a positive childbirth experience underpinned data analysis. RESULTS: Of the 7197 identified citations, 30 articles were included in this review. Women's needs during the intrapartum period resonate with what women want globally, however, priorities regarding the components of quality care for women and the urgency to intervene differed in this context given the socio-cultural norms and available resources. Women received sub-quality intrapartum care and global standards for woman-centred care were often compromised. They were mistreated verbally and physically. Women experienced poor communication with their care providers and non-consensual care and were rarely involved in decisions concerning their care. Women were denied the companion of choice due to cultural and structural factors. CONCLUSION: To improve care seeking and satisfaction with health services, woman-centred care is necessary for a positive childbirth experience. Women must be meaningfully engaged in the design of health services, accountability frameworks, and evaluation of maternal services. Research is needed to set minimum indicators for woman-centred outcomes for low-resource settings along with actionable strategies to enhance the quality of maternity care based on women's needs and preferences.