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Early and unintended pregnancy in Eastern and Southern Africa: analysis of adolescent sexual and reproductive health and rights policies

Wed, 10/04/2024 - 02:17

In 2019, there were 21 million pregnancies among adolescents aged 15–19 years globally; close to half of these pregnancies were unintended. Early and unintended pregnancy (EUP) remains a pressing concern with severe socioeconomic and health outcomes for adolescent girls aged 15–19 years, their offspring and society. In Eastern and Southern Africa (ESA), Zambia, the United Republic of Tanzania, the Democratic Republic of Congo, Malawi and Uganda have adolescent fertility rates (AFR) of more than 100 live births per 1000 adolescent girls aged 15–19 years. Ministers of Health and Education, through the ESA Ministerial Commitment, aimed to reduce EUP by 75% by 2020; the renewed ESA Ministerial Commitment aims to reduce EUP by 40% by 2030. This descriptive policy content analysis assesses the prioritisation of EUP within adolescent sexual and reproductive health and rights (ASRHR) policies. An assessment of nine countries in the region shows that EUP is a key policy priority among countries; however, other than Kenya, the majority of ASRHR policies in the region do not set out clear and costed interventions for EUP, and few have monitoring and evaluation frameworks in place. Despite AFRs declining in Kenya and strong policies in place, the gains made are at risk due to the rollback on SRHR, and the country has not renewed the ESA Ministerial Commitment. This policy content analysis points towards the gaps we are still to meet within the universal health coverage agenda: better planning, prioritisation, sound policy frameworks and long-term commitments to meet the needs of adolescents.

National public health institutes in the Eastern Mediterranean Region: Insights from experts in the field

Mon, 08/04/2024 - 17:00

National public health institutes (NPHIs) are crucial to the effectiveness of public health systems, including delivering essential public health functions and generating evidence for national health policies, strategies and plans. Currently, there is a significant lack of information regarding NPHI or NPHI-like organisations in Eastern Mediterranean Region (EMR) countries, including how they fit into their broader health systems governance landscape. NPHIs exist in 12 out of 22 EMR countries, yet there is no official International Association of National Public Health Institutes (IANPHI) regional network for the EMR, despite established IANPHI networks in four other regions. In 2022, the WHO’s Eastern Mediterranean Regional Office led a study comprising an online survey and key informant interviews, which synthesised expert insights and summarised recommendations to strengthen the health systems governance-related role of NPHIs in EMR countries. Study participants included current and former high-level representatives of NPHIs, the government (eg, Ministries of Health, health regulatory authorities), multilateral organisations or non-governmental organisations focusing on health, and others identified as senior health systems governance experts from EMR. Insights and recommendations from experts varied widely, but there were also many common elements and overlaps. These included the need for enhancing NPHI functionalities and collaborative efforts with the public health sector (eg, Ministry of Health, Health Council) in health policy and decision-making formulation and implementation. This, in turn, requires advancing NPHI’s fit-for-purpose and sustainable governance and financing arrangements, improving the accessibility and transparency of health data for NPHIs, strengthening engagement and collaboration between NPHIs and other health system actors (including the private sector), and promoting a more prominent role for NPHIs in the development and implementation of public health-related policies and legislation. While many excellent insights and thoughtful strategic guidance are provided, further adaptation may be needed to implement the proposed recommendations in different EMR country contexts going forward.

Mortality variability and differentials by age and causes of death in rural South Africa, 1994-2018

Mon, 08/04/2024 - 17:00
Introduction

Understanding mortality variability by age and cause is critical to identifying intervention and prevention actions to support disadvantaged populations. We assessed mortality changes in two rural South African populations over 25 years covering pre-AIDS and peak AIDS epidemic and subsequent antiretroviral therapy (ART) availability.

Methods

Using population surveillance data from the Agincourt Health and Socio-Demographic Surveillance System (AHDSS; 1994–2018) and Africa Health Research Institute (AHRI; 2000–2018) for 5-year periods, we calculated life expectancy from birth to age 85, mortality age distributions and variation, and life-years lost (LYL) decomposed into four cause-of-death groups.

Results

The AIDS epidemic shifted the age-at-death distribution to younger ages and increased LYL. For AHDSS, between 1994–1998 and 1999–2003 LYL increased for females from 13.6 years (95% CI 12.7 to 14.4) to 22.1 (95% CI 21.2 to 23.0) and for males from 19.9 (95% CI 18.8 to 20.8) to 27.1 (95% CI 26.2 to 28.0). AHRI LYL in 2000–2003 was extremely high (females=40.7 years (95% CI 39.8 to 41.5), males=44.8 years (95% CI 44.1 to 45.5)). Subsequent widespread ART availability reduced LYL (2014–2018) for women (AHDSS=15.7 (95% CI 15.0 to 16.3); AHRI=22.4 (95% CI 21.7 to 23.1)) and men (AHDSS=21.2 (95% CI 20.5 to 22.0); AHRI=27.4 (95% CI 26.7 to 28.2)), primarily due to reduced HIV/AIDS/TB deaths in mid-life and other communicable disease deaths in children. External causes increased as a proportion of LYL for men (2014–2018: AHRI=25%, AHDSS=17%). The share of AHDSS LYL 2014–2018 due to non-communicable diseases exceeded pre-HIV levels: females=43%; males=40%.

Conclusions

Our findings highlight shifting burdens in cause-specific LYL and persistent mortality differentials in two populations experiencing complex epidemiological transitions. Results show high contributions of child deaths to LYL at the height of the AIDS epidemic. Reductions in LYL were primarily driven by lowered HIV/AIDS/TB and other communicable disease mortality during the ART periods. LYL differentials persist despite widespread ART availability, highlighting the contributions of other communicable diseases in children, HIV/AIDS/TB and external causes in mid-life and non-communicable diseases in older ages.

Damage to medical complexes in the Gaza Strip during the Israel-Hamas war: a geospatial analysis

Fri, 05/04/2024 - 11:37
Introduction

Medical facilities are civilian objects specially protected during armed conflict by international humanitarian law (IHL). These protections are customarily applied regardless of the conflict, parties or contexts involved. Attacks on medical care have characterised the bombardment campaign of the Gaza Strip beginning 7 October 2023. This study presents evidence regarding patterns of damage to medical complexes relative to all other buildings in the first month of this conflict.

Methods

This is an observational pre/post-study of damage to buildings during the first month of the Israel Defence Force bombardment of Gaza from 7 October to 7 November 2023. Open-source polygons for the Gaza Strip were spatially joined with building damage assessments from satellite imagery analysis. Medical facilities were included in the analysis if they were cross-referenced by a minimum of two datasets. Logistic regression was used to test for statistically significant differences in the proportions of damaged medical complexes and other buildings.

Results

A total of 167 292 unique buildings were identified, including 106 cross-referenced medical complexes. Approximately 9% of non-medical buildings and medical complexes alike sustained damage during the first month of the bombardment. No difference in the odds of damage was detected between medical complexes and all other buildings (OR: 0.89; 95% CI: 0.45-1.76; p>0.74).

Conclusion

There is a lack of evidence of differential damage to medical and non-medical complexes during the first month of the bombing campaign. This finding raises concerns about combatants’ application of the principles of distinction, proportionality and precaution, suggesting the importance of further investigation.

Effectiveness and safety of COVID-19 vaccines on maternal and perinatal outcomes: a systematic review and meta-analysis

Fri, 05/04/2024 - 02:58
Objective

To assess the effects of COVID-19 vaccines in women before or during pregnancy on SARS-CoV-2 infection-related, pregnancy, offspring and reactogenicity outcomes.

Design

Systematic review and meta-analysis.

Data sources

Major databases between December 2019 and January 2023.

Study selection

Nine pairs of reviewers contributed to study selection. We included test-negative designs, comparative cohorts and randomised trials on effects of COVID-19 vaccines on infection-related and pregnancy outcomes. Non-comparative cohort studies reporting reactogenicity outcomes were also included.

Quality assessment, data extraction and analysis

Two reviewers independently assessed study quality and extracted data. We undertook random-effects meta-analysis and reported findings as HRs, risk ratios (RRs), ORs or rates with 95% CIs.

Results

Sixty-seven studies (1 813 947 women) were included. Overall, in test-negative design studies, pregnant women fully vaccinated with any COVID-19 vaccine had 61% reduced odds of SARS-CoV-2 infection during pregnancy (OR 0.39, 95% CI 0.21 to 0.75; 4 studies, 23 927 women; I2=87.2%) and 94% reduced odds of hospital admission (OR 0.06, 95% CI 0.01 to 0.71; 2 studies, 868 women; I2=92%). In adjusted cohort studies, the risk of hypertensive disorders in pregnancy was reduced by 12% (RR 0.88, 95% CI 0.82 to 0.92; 2 studies; 115 085 women), while caesarean section was reduced by 9% (OR 0.91, 95% CI 0.85 to 0.98; 6 studies; 30 192 women). We observed an 8% reduction in the risk of neonatal intensive care unit admission (RR 0.92, 95% CI 0.87 to 0.97; 2 studies; 54 569 women) in babies born to vaccinated versus not vaccinated women. In general, vaccination during pregnancy was not associated with increased risk of adverse pregnancy or perinatal outcomes. Pain at the injection site was the most common side effect reported (77%, 95% CI 52% to 94%; 11 studies; 27 195 women).

Conclusion

COVID-19 vaccines are effective in preventing SARS-CoV-2 infection and related complications in pregnant women.

PROSPERO registration number

CRD42020178076.

Informing the pandemic response: the role of the WHOs COVID-19 Weekly Epidemiological Update

Fri, 05/04/2024 - 02:58

On 31 December 2019, the Municipal Health Commission of Wuhan, China, reported a cluster of atypical pneumonia cases. On 5 January 2020, the WHO publicly released a Disease Outbreak News (DON) report, providing information about the pneumonia cases, implemented response interventions, and WHO’s risk assessment and advice on public health and social measures. Following 9 additional DON reports and 209 daily situation reports, on 17 August 2020, WHO published the first edition of the COVID-19 Weekly Epidemiological Update (WEU). On 1 September 2023, the 158th edition of the WEU was published on WHO’s website, marking its final issue. Since then, the WEU has been replaced by comprehensive global epidemiological updates on COVID-19 released every 4 weeks. During the span of its publication, the webpage that hosts the WEU and the COVID-19 Operational Updates was accessed annually over 1.4 million times on average, with visits originating from more than 100 countries. This article provides an in-depth analysis of the WEU process, from data collection to publication, focusing on the scope, technical details, main features, underlying methods, impact and limitations. We also discuss WHO’s experience in disseminating epidemiological information on the COVID-19 pandemic at the global level and provide recommendations for enhancing collaboration and information sharing to support future health emergency responses.

Setting up a data system for monitoring malaria vaccine introduction readiness and uptake in 42 health districts in Cameroon

Fri, 05/04/2024 - 02:58

Three months after the first shipment of RTS,S1/AS01 vaccines, Cameroon started, on 22 January 2024, to roll out malaria vaccines in 42 districts among the most at risk for malaria. Cameroon adopted and implemented the World Health Organization (WHO) malaria vaccine readiness assessment tool to monitor the implementation of preintroduction activities at the district and national levels. One week before the start of the vaccine rollout, overall readiness was estimated at 89% at a national level with two out of the five components of readiness assessment surpassing 95% of performance (vaccine, cold chain and logistics and training) and three components between 80% and 95% (planning, monitoring and supervision, and advocacy, social mobilisation and communication). ‘Vaccine, cold chain and logistics’ was the component with the highest number of districts recording below 80% readiness. The South-West and North-West, two regions with a high level of insecurity, were the regions with the highest number of districts that recorded a readiness performance below 80% in the five components. To monitor progress in vaccine rollout daily, Cameroon piloted a system for capturing immunisation data by vaccination session coupled with an interactive dashboard using the R Shiny platform. In addition to displaying data on vaccine uptake, this dashboard allows the generation of the monthly immunisation report for all antigens, ensuring linkage to the regular immunisation data system based on the end-of-month reporting through District Health Information Software 2. Such a hybrid system complies with the malaria vaccine rollout principle of full integration into routine immunisation coupled with strengthened management of operations.

Interventions to address antimicrobial resistance: an ethical analysis of key tensions and how they apply in low- income and middle-income countries

Wed, 03/04/2024 - 17:19
Abstract

Antimicrobial resistance (AMR) is a global health and one health problem. Efforts to mitigate the problem of AMR are challenging to implement due to unresolved ethical tensions. We present an in-depth ethical analysis of tensions that might hinder efforts to address AMR. First, there is a tension between access and excess in the current population: addressing lack of access requires facilitating use of antimicrobials for some populations, while addressing excessive use for other populations. Second, there is a tension between personal interests and a wider, shared interest in curbing AMR. These personal interests can be viewed from the perspective of individuals seeking care and healthcare providers whose livelihoods depend on using or selling antimicrobials and who profit from the sales and use of antimicrobials. Third, there is a tension between the interests of current populations and the interests of future generations. Last, there is a tension between addressing immediate health threats such as pandemics, and AMR as a ‘silent’, chronic threat. For each of these tensions, we apply ‘descriptive ethics’ methods that draw from existing evidence and our experiences living and working in low-income and middle-income countries to highlight how these ethical tensions apply in such settings.

Effect of the COVID-19 pandemic on HIV, malaria and tuberculosis indicators in Togo: an interrupted time series analysis

Wed, 03/04/2024 - 17:19
Background

Limited data are available on the effects of the COVID-19 pandemic on health-related indicators in sub-Saharan Africa. This study aimed to estimate the effect of the COVID-19 pandemic on nine indicators of HIV, malaria and tuberculosis (TB) in Togo.

Methods

For this interrupted time series analysis, national health information system data from January 2019 to December 2021 and TB programmatic data from the first quarter of 2018 to the fourth quarter of 2022 were analysed. Nine indicators were included. We used Poisson segmented regression to estimate the immediate impact of the pandemic and per-pandemic period trends through incidence rate ratios (IRRs) with 95% CIs.

Results

Overall, there was a decrease in six of the nine indicators, ranging from 19.3% (IRR 0.807, 95% CI 0.682 to 0.955, p=0.024) for the hospitalisation of patients for malaria to 36.9% (IRR 0.631, 95% CI 0.457 to 0.871, p=0.013) for TB diagnosis by Mycobacterium tuberculosis Xpert immediately after the declaration of the COVID-19 pandemic. A comparison of the observed and predicted trends showed that the trend remained constant between the prepandemic and pandemic periods of COVID-19 for all malaria indicators. A significant downward monthly trend was observed in antiretroviral therapy initiation (IRR 0.909, 95% CI 0.892 to 0.926, p<0.001) and positive TB microscopy (IRR 0.919, 95% CI 0.880 to 0.960, p=0.002).

Conclusion

HIV, malaria and TB services were generally maintained over time in Togo despite the COVID-19 pandemic. However, given the decline in levels immediately after the onset of the pandemic, there is an urgent need to improve the preparedness of the healthcare system.

Under-5 mortality surveillance in low-income and middle-income countries: insights from two Health and Demographic Surveillance Systems in rural Gambia

Wed, 03/04/2024 - 03:15

Without complete data on under-5 mortality, tracking progress towards achieving Sustainable Development Goal 3.2 will be challenging. Such data are also needed to ensure proper planning and prioritisation of scarce resources in low-income and middle-income countries. However, most low-income and middle-income countries have weak Civil Registration and Vital Statistics (CRVS) systems, leaving a critical gap in understanding under-5 mortality dynamics. This paper outlines a community-based approach to enhance under-5 mortality surveillance in low-income countries, using The Gambia as a case study. The methodology involves Health and Demographic Surveillance Systems (HDSSs) in Basse and Fuladu West, employing unique identification numbers, periodical household visits and collaboration with communities, village reporters and project field workers to ensure comprehensive data collection. Verbal autopsies (VAs) are conducted by trained field workers, and causes of death are determined using the physician-certified VA method. Between 1 September 2019 and 1 September 2023, 1333 deaths were detected, for which causes of death were determined for 97.1% (1294 of 1333). The most common causes of death detected were acute respiratory infections including pneumonia, sepsis, diarrhoeal diseases and birth asphyxia. Challenges include the cost of maintaining the HDSSs, poor road infrastructure, Electronic Data Capture transition challenges, and the need for national integration of HDSS data into the CRVS system. The success of this model highlights its potential for scalable and adaptable under-5 mortality surveillance in resource-limited settings.

Guidance on sexual, reproductive, maternal, newborn, child and adolescent health in humanitarian and fragile settings: a scoping review

Fri, 29/03/2024 - 16:23
Introduction

Progress related to sexual, reproductive, maternal, newborn, child and adolescent health (SRMNCAH) has stalled. COVID-19, conflict and climate change threaten to reverse decades of progress and to ensure the health and well-being of vulnerable populations in humanitarian and fragile settings (HFS) going forward, there is a need for tailored guidance for women, children and adolescents (WCA). This review seeks to map and appraise current resources on SRMNCAH in HFS.

Methods

In line with the updated Joanna Briggs Institute guidance and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews framework, a manual literature review was conducted of global and regional guidance published between January 2008 and May 2023 from members of the Global Health Cluster, the Global Nutrition Cluster and the Inter-Agency Working Group on Reproductive Health in Crises. A content analysis was conducted. Scores were then calculated according to the Appraisal of Guidelines for Research and Evaluation II scoring tool and subsequently categorised as high quality or low quality.

Results

A total of 730 documents were identified. Of these, 141 met the selection criteria and were analysed. Available guidance for delivering SRMNCH services exists, which can inform policy and programming for the general population and WCA. Important gaps related to beneficiaries, health services and health system strengthening strategies were identified.

Conclusion

The review revealed there is evidence-based guidance available to support interventions targeting WCA in HFS, including: pregnant and lactating women, women of reproductive age, adolescents, newborns, small vulnerable newborns, stillbirths, refugees and internally displaced persons and WCA with disabilities. However, gaps related to beneficiaries, health services and health system strengthening strategies must be addressed in updated guidance that is created, disseminated and monitored in a standardised way that is mindful of the need to respond rapidly in HFS.

Estimation of country-specific tuberculosis resistance antibiograms using pathogen genomics and machine learning

Thu, 28/03/2024 - 16:29
Background

Global tuberculosis (TB) drug resistance (DR) surveillance focuses on rifampicin. We examined the potential of public and surveillance Mycobacterium tuberculosis (Mtb) whole-genome sequencing (WGS) data, to generate expanded country-level resistance prevalence estimates (antibiograms) using in silico resistance prediction.

Methods

We curated and quality-controlled Mtb WGS data. We used a validated random forest model to predict phenotypic resistance to 12 drugs and bias-corrected for model performance, outbreak sampling and rifampicin resistance oversampling. Validation leveraged a national DR survey conducted in South Africa.

Results

Mtb isolates from 29 countries (n=19 149) met sequence quality criteria. Global marginal genotypic resistance among mono-resistant TB estimates overlapped with the South African DR survey, except for isoniazid, ethionamide and second-line injectables, which were underestimated (n=3134). Among multidrug resistant (MDR) TB (n=268), estimates overlapped for the fluoroquinolones but overestimated other drugs. Globally pooled mono-resistance to isoniazid was 10.9% (95% CI: 10.2-11.7%, n=14 012). Mono-levofloxacin resistance rates were highest in South Asia (Pakistan 3.4% (0.1–11%), n=111 and India 2.8% (0.08–9.4%), n=114). Given the recent interest in drugs enhancing ethionamide activity and their expected activity against isolates with resistance discordance between isoniazid and ethionamide, we measured this rate and found it to be high at 74.4% (IQR: 64.5–79.7%) of isoniazid-resistant isolates predicted to be ethionamide susceptible. The global susceptibility rate to pyrazinamide and levofloxacin among MDR was 15.1% (95% CI: 10.2-19.9%, n=3964).

Conclusions

This is the first attempt at global Mtb antibiogram estimation. DR prevalence in Mtb can be reliably estimated using public WGS and phenotypic resistance prediction for key antibiotics, but public WGS data demonstrates oversampling of isolates with higher resistance levels than MDR. Nevertheless, our results raise concerns about the empiric use of short-course fluoroquinolone regimens for drug-susceptible TB in South Asia and indicate underutilisation of ethionamide in MDR treatment.

Midwife-led birthing centres in Bangladesh, Pakistan and Uganda: an economic evaluation of case study sites

Thu, 28/03/2024 - 16:29
Introduction

Achieving the Sustainable Development Goals to reduce maternal and neonatal mortality rates will require the expansion and strengthening of quality maternal health services. Midwife-led birth centres (MLBCs) are an alternative to hospital-based care for low-risk pregnancies where the lead professional at the time of birth is a trained midwife. These have been used in many countries to improve birth outcomes.

Methods

The cost analysis used primary data collection from four MLBCs in Bangladesh, Pakistan and Uganda (n=12 MLBC sites). Modelled cost-effectiveness analysis was conducted to compare the incremental cost-effectiveness ratio (ICER), measured as incremental cost per disability-adjusted life-year (DALY) averted, of MLBCs to standard care in each country. Results were presented in 2022 US dollars.

Results

Cost per birth in MLBCs varied greatly within and between countries, from US$21 per birth at site 3, Bangladesh to US$2374 at site 2, Uganda. Midwife salary and facility operation costs were the primary drivers of costs in most MLBCs. Six of the 12 MLBCs produced better health outcomes at a lower cost (dominated) compared with standard care; and three produced better health outcomes at a higher cost compared with standard care, with ICERs ranging from US$571/DALY averted to US$55 942/DALY averted.

Conclusion

MLBCs appear to be able to produce better health outcomes at lower cost or be highly cost-effective compared with standard care. Costs do vary across sites and settings, and so further exploration of costs and cost-effectiveness as a part of implementation and establishment activities should be a priority.

Reviewing essential public health functions in the Eastern Mediterranean Region post COVID-19 pandemic: a foundation for system resilience

Thu, 28/03/2024 - 16:29

The COVID-19 pandemic exposed vulnerabilities in many health systems worldwide with profound implications for health and society. The public health challenges experienced during the pandemic have highlighted the importance of resilient health systems, that can adapt and transform to meet the population’s evolving health needs. Essential public health functions (EPHFs) offer a holistic, integrated and sustainable approach to public health by contributing to achieving several health priorities and goals. In recent years, there has been a focused effort to conceptualise and define the EPHFs. In this paper, we describe the collaborative approach undertaken by the WHO Eastern Mediterranean Region (EMR) and UK Health Security Agency and present the findings and results of the revised EPHFs, in view of lessons learnt from the COVID-19 pandemic and the current priorities for countries across the EMR. This included conducting a desktop review, a gap and bottleneck analysis and stakeholder consultation to arrive at the revised EPHF model including four enablers and nine core functions, including a new function: public health services. The EPHFs will offer countries a complementary and synergistic approach to strengthen health systems and public health capacities and contribute to the region’s ability to effectively respond to future health challenges and emergencies. By focusing on the EPHFs, countries can work towards ensuring health security as an integral goal for the health system besides universal health coverage, thus strengthening and building more resilient and equitable health systems.

How far can reformulation participate in improving the nutritional quality of diets at population level? A modelling study using real food market data in France

Tue, 26/03/2024 - 02:25
Background

Food reformulation is promoted as a tool to improve the nutritional quality of population diets. However, the potential impact of industry-wide reformulation on dietary intake has been investigated minimally.

Objectives

The aim was to estimate the impact on the French population nutrient intakes of industry-wide reformulation towards healthier products using the updated nutrient profiling system underpinning the front-of-pack nutrition label Nutri-Score (uNS-NPS).

Methods

Dietary data were retrieved from the Nutrinet-Santé cohort at baseline (N=100 418), providing detailed information regarding participants’ food choices (N>3000 generic food items). Each individual food from 24 hours dietary record was matched with French food market data from OpenFoodFacts database (N=119 073 products). Three scenarios were constructed using nutrient content of currently existing food products: (1) all products available (baseline situation); (2) only existing products of better nutritional quality were available as potential substitutes and (3) only existing products of poorer quality were available. The assessment of the nutritional quality was based on the uNS-NPS score. Finally, dietary intakes were calculated for each scenario after random attribution of healthier/less healthy products as dietary choices. Monte-Carlo iterations (n=300) were conducted to generate uncertainty intervals.

Results

After simulation of reformulation using scenario 2, reduction in daily intake in comparison with the baseline situation was observed for energy (–55 kcal/day, –2.9%), saturated fat (–2.4g/day, –7.6%), sugar (–4.8g/day, –5.3%) and salt (–0.54g/day, –8.3%) and increase was observed for fibre (+1.0g/day, +4.9%). Improvements in diet quality were observed regardless of the overall quality of diet. The most important contributors to diet improvement were the followings: (1) sugars: sugary products, sweet bakery products and dairy products; (2) saturated fat: sweet bakery products, dairy products and prepared dishes and (3) salt: bread, prepared dishes, vegetable preparations and soups.

Conclusion

Widespread reformulation of food offer appeared to be an opportunity for improving nutritional status at population level in France.

Reduction of malaria case incidence following the introduction of clothianidin-based indoor residual spraying in previously unsprayed districts: an observational analysis using health facility register data from Cote dIvoire, 2018-2022

Fri, 22/03/2024 - 15:42
Background

Indoor residual spraying (IRS) using neonicotinoid-based insecticides (clothianidin and combined clothianidin with deltamethrin) was deployed in two previously unsprayed districts of Côte d’Ivoire in 2020 and 2021 to complement standard pyrethroid insecticide-treated nets. This retrospective observational study uses health facility register data to assess the impact of IRS on clinically reported malaria case incidence.

Methods

Health facility data were abstracted from consultation registers for the period September 2018 to April 2022 in two IRS districts and two control districts that did not receive IRS. Malaria cases reported by community health workers (CHWs) were obtained from district reports and District Health Information Systems 2. Facilities missing complete data were excluded. Controlled interrupted time series models were used to estimate the effect of IRS on monthly all-ages population-adjusted confirmed malaria cases and cases averted by IRS. Models controlled for transmission season, precipitation, vegetation, temperature, proportion of cases reported by CHWs, proportion of tested out of suspected cases and non-malaria outpatient visits.

Results

An estimated 10 988 (95% CI 5694 to 18 188) malaria cases were averted in IRS districts the year following the 2020 IRS campaign, representing a 15.9% reduction compared with if IRS had not been deployed. Case incidence in IRS districts dropped by 27.7% (incidence rate ratio (IRR) 0.723, 95% CI 0.592 to 0.885) the month after the campaign. In the 8 months after the 2021 campaign, 14 170 (95% CI 13 133 to 15 025) estimated cases were averted, a 24.7% reduction, and incidence in IRS districts dropped by 37.9% (IRR 0.621, 95% CI 0.462 to 0.835) immediately after IRS. Case incidence in control districts did not change following IRS either year (p>0.05) and the difference in incidence level change between IRS and control districts was significant both years (p<0.05).

Conclusion

Deployment of clothianidin-based IRS was associated with a reduction in malaria case rates in two districts of Côte d’Ivoire following IRS deployment in 2020 and 2021.

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