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Data collected in 2022 in rural Senegal on household adaptation to environmental change highlights the benefits of interviewing multiple members of a household. Not only does it enrich the data collected, with each member complementing the interview of the others, but it also provides access to different lived experiences. This is critical to ensuring that policy responses are appropriate for all members of a household and that all lived realities are made visible. [ABSTRACT FROM AUTHOR]

HIV is highly prevalent in men who have sex with men (MSM) in West Africa. Many MSM in the region also have sex with women (MSMW). Accordingly, they are a potential bridge subpopulation for HIV transmission to women. We aimed to evaluate the proportions and characteristics of West African MSMW at high behavioral risk of acquiring HIV from male partners and transmitting it to female partners (HBRMF). The cohort ANRS-12324 CohMSM Study included 630 HIV-negative MSM in Burkina Faso, Cote d'Ivoire, Mali, and Togo. Among MSMW (i.e., with ≥ 1 female partner) in the cohort, HBRMF was identified using trajectory models based on seven at-risk sexual practices with male and female partners, including inconsistent condom use, multiple partnerships, and receptive same-sex anal intercourse. To assess the relevance of using trajectory models, we compared the proportions of participants who seroconverted during the cohort follow-up among those at HBRMF and those not at HBRMF. Factors associated with HBRMF were identified using a generalized estimation equation logistic regression model accounting for longitudinal data. Approximately half (47%) of the 304 MSMW (22% of all CohMSM study participants) were at HBRMF. This group accounted for 75% of the 28 HIV seroconversions observed during follow-up (p = 0.001). HBRMF was positively associated with being aged < 25 years (aOR 95% CI 1.67 [1.23–2.27]), being sexually attracted only to men (1.97 [1.38–2.78]), feelings of loneliness (1.92 [1.38–2.65]), and homonegative violence score (1.22 [1.05–1.41]). HBRMF was negatively associated with having had both stable and casual female partners in the previous 6 months (0.34 [0.20–0.60] vs. only a stable female partner). HBRMF tended to be negatively associated with having ≥ 4 sexual intercourses with female partners in the previous four weeks (0.54 [0.27–1.06] vs. no intercourse). Establishing official relationships with women might be a strategy for young and/or stigmatized MSMW to comply with social pressure to display a heterosexual lifestyle. However, this seems to increase the risk of HIV transmission to female partners. In the present study, almost half of MSMW were at HBRMF. This result stresses the need to adapt HIV research and prevention to MSMW and their female partners. [ABSTRACT FROM AUTHOR]

Background: As malaria continues to be a significant global public health concern, especially in Sub-Saharan Africa, Chinese workers in Africa are at increased risk of malaria. The effectiveness of malaria prevention measures implemented by Chinese companies and workers is a question that may correlate with the malaria infection rate in this population. This study explored the use and effectiveness of malaria prevention measures for Chinese employees in West Africa to provide a reference for companies and individuals on improving malaria prevention and control. Methods: Using a cross-sectional approach, we surveyed 256 participants in 2021, mainly from Nigeria, Mali, Côte d'Ivoire, Ghana, Guinea, Sierra Leone, and Senegal in West Africa. The survey duration is from July to the end of September 2021. We selected two companies from the 2020 ENR "World's Largest 250 International Contractors" list, which featured 6 Chinese companies, all of which are state-owned and have a 61.9% market share in Africa. The participants were Chinese workers with more than a year of work experience in construction companies in Africa. A 20-minute WeChat-based structured online questionnaire was used to obtain information on malaria infection status and malaria prevention measures. Descriptive statistical analysis, chi-square test, principal components analysis, and ordinal logistic regression analysis are used to analyze the data obtained. The difference in Statistical significance was set at P < 0.05. Results: Ninety six (37.5%) participants contracted malaria more than once within a year. The principal components analysis found a low correlation between public and individual preventive measures. No significant correlation was found between public preventive measures and malaria infection (p > 0.05), while standardized use of mosquito nets (P = 0.016) and pesticide spraying (P = 0.047) contributed significantly to fewer malaria infections at the individual level, but the removal of vegetation around houses (P = 0.028) at the individual level related to higher malaria infection. Conclusions: In our sample of Chinese construction workers going to Africa, some individual preventive measures had a stronger association with malaria prevention than a variety of public environmental measures. Furthermore, individual and public preventive measures were not associated with each other. Both of these findings are surprising and require further investigation in larger and more diverse samples. This- study provides important clues about the challenges that risk reduction programs face for migrant workers from China and elsewhere. [ABSTRACT FROM AUTHOR]

• There are at least 137 plants from 53 families used in traditional oral health care in West Africa. • Less than 50 % of the plants have been tested for their antimicrobial activities against oral pathogens. • Candida albicans, fusobacterium nucleatum, porphyromonas gingivalis, and streptococcus mutans are the most tested pathogens for antimicrobial studies. • Very few studies have examined the antimicrobial activities of isolated phytochemicals. The physiological condition of the oral cavity makes it a perfect place for microbial growth. Therefore, diseases associated with the oral cavity affect approximately half of the world's population, making them some of the most common diseases. In Africa, the use of medicinal plants for oral health is a longstanding tradition because of their accessibility and affordability. This study reviews the published literature on the plants used for treating oral diseases in West Africa and the scientific studies carried out on the plants regarding the validation of their ethnobotanical uses. The information used in this review was retrieved from various published articles downloaded from databases and journal websites. A total of 137 plant species from 53 families are presented in this review. The families Fabaceae (22), Asteraceae (8), Anarcadiaceae (6), Euphorbiaceae (6), Combretaceae (5), Myrtaceae (5), Rubiaceae (5), Apocynaceae (4), and Meliaceae (4) account for 47 % of the plants recorded in this review. Approximately 50 % of the plant species are trees; leaves are the most commonly used plant part, and decoction is the most preferred preparation method. Of the 137 plants, only 41 have been examined for their antimicrobial activities against oral pathogens, notably Candida albicans, Fusobacterium nucleatum, Porphyromonas gingivalis , and Streptococcus mutans. Based on this, some of the most active plants with low MIC include Allium cepa, Argemone mexicana, Ricinus communis , and Syzygium aromaticum. A few studies have also tested the activities of isolated phytochemicals from some plants and evidence of beneficial synergism between two or three plants on oral infections. The conservation statuses of most of the species implicated in this review are least concerned (66); 5 species are vulnerable , 3 species are nearly threatened, and one species is endangered. This review revealed the need to intensify efforts on the ethnobotanical and ethnopharmacological studies of plants used to treat various oral diseases. [ABSTRACT FROM AUTHOR]

Farming has changed the face of the earth in Africa as much as elsewhere. But histories of African farmscapes, shaped by millennia of agriculture, are obscured by narratives of pristine landscapes, whether of forests or savanna, and the role of farming in transforming African farmscapes is seldom taught in schools. We present examples of farming strategies and systems from western and southern Africa, which we hope are inspiring and maybe, at times, even surprising. Our exploration of the farmscapes, structured along the classical elements of Earth, Fire, Water, and Air, describes how plants and people deal with the influence these elements have on successful farming and how these influences show up in farmscapes. We hope these stories of flexibility, adaptation, and success and failure motivate teachers and students to think out of the box in grappling with the challenges our world is facing. These stories also provide opportunities for teaching about the United Nations Sustainable Development Goals (SDGs), particularly the goals of Zero Hunger (SDG 2), Responsible Consumption and Production (SDG 12), and Life on Land (SDG 15). [ABSTRACT FROM AUTHOR]

Abstract Background As malaria continues to be a significant global public health concern, especially in Sub-Saharan Africa, Chinese workers in Africa are at increased risk of malaria. The effectiveness of malaria prevention measures implemented by Chinese companies and workers is a question that may correlate with the malaria infection rate in this population. This study explored the use and effectiveness of malaria prevention measures for Chinese employees in West Africa to provide a reference for companies and individuals on improving malaria prevention and control. Methods Using a cross-sectional approach, we surveyed 256 participants in 2021, mainly from Nigeria, Mali, Côte d’Ivoire, Ghana, Guinea, Sierra Leone, and Senegal in West Africa. The survey duration is from July to the end of September 2021. We selected two companies from the 2020 ENR "World’s Largest 250 International Contractors" list, which featured 6 Chinese companies, all of which are state-owned and have a 61.9% market share in Africa. The participants were Chinese workers with more than a year of work experience in construction companies in Africa. A 20-minute WeChat-based structured online questionnaire was used to obtain information on malaria infection status and malaria prevention measures. Descriptive statistical analysis, chi-square test, principal components analysis, and ordinal logistic regression analysis are used to analyze the data obtained. The difference in Statistical significance was set at P 0.05), while standardized use of mosquito nets (P = 0.016) and pesticide spraying (P = 0.047) contributed significantly to fewer malaria infections at the individual level, but the removal of vegetation around houses (P = 0.028) at the individual level related to higher malaria infection. Conclusions In our sample of Chinese construction workers going to Africa, some individual preventive measures had a stronger association with malaria prevention than a variety of public environmental measures. Furthermore, individual and public preventive measures were not associated with each other. Both of these findings are surprising and require further investigation in larger and more diverse samples. This- study provides important clues about the challenges that risk reduction programs face for migrant workers from China and elsewhere.

We tackle the potential impact of bushmeat markets (BM) and traditional medicine markets (TMM) on the functional diversity of mammalian communities in southern Benin, West Africa. A hybrid approach combining direct observations, DNA-typing and questionnaires allowed us to identify 94 species-level taxa across 11 mammalian orders, the greatest ever reported numbers for African wildlife markets. TMM sold species of high conservation concern or regulated by international conventions and sourced among all the taxonomic orders and bioclimatic zones of the country. BM were taxonomically and functionally 100% nested within TMM. However, functional richness was high in both markets, impacting nine diet specializations and five ecological functions, which included seed dispersion (frugivores, folivores and omnivores), prey regulation (carnivores and invertivores), browsing (folivores), grazing (omnivores) and fertilization (nectarivores). TMM likely jeopardized the regulatory, structural and production functions of the sourced ecosystems as they sold species with the greatest body weights and generation lengths, and smallest litter sizes, including large herbivores and keystone predators. BM, despite their restricted range, sourced among a non-selective taxonomic and functional spectrum and as such, also represent a significant threat to ecosystem functioning in southern Benin. The functional database that we provide can serve as a starting point to pursue the quantification of functional diversity in African mammals and further investigate the impact of wildlife markets on ecosystem functioning in tropical Africa. Overall, long-term surveys of the two types of wildlife markets are needed to accurately quantify the threat they constitute to mammalian biodiversity and the sustainability of ecosystem services.

Despite Africa’s high economic growth rate, its logistics costs remain high, and many infrastructure projects and logistics policies are being implemented. Moreover, in Western Africa, where several economic communities have been established, logistics growth is still unstable due to civil conflicts and political changes. These factors are rapidly changing the logistics situation in Western Africa, and there is a need to identify changes in the competitiveness of countries and seaports that handle cargo to/from landlocked countries. The objective of this study is to quantitatively analyse the time-series changes in the logistics situation in West Africa applying the global logistics intermodal network simulation model to the African continent with different parameters by time points. Scenarios regarding political upheavals in Western Africa are examined to clarify the effect on the cargo flow of landlocked countries. The simulation results indicate that Côte d’Ivoire gets greater access to Burkina Faso if border facilities in neighbouring countries stagnate. Moreover, the absence of civil conflicts may raise the presence of Abidjan Port as a regional transhipment hub more prominent and increase its container throughputs. The findings of this study contribute to quantitatively visualising the impact of the events on the logistics situation in Western Africa, which can help formulate future logistics policies and development strategies.

Understanding the factors controlling soil total N (TN) is helpful in simulating N cycling at local and regional scales. This study was conducted with the aim to; (i) understand the distribution of TN in specific soil horizons (A and B horizons) of three reference soil groups: Acrisols, Cambisols and Ferralsols, common in humid tropical environments, and (ii) to identify factors controlling TN variations among the various soil groups. Twenty-eight Acrisols, 21 Cambisols and 8 Ferralsols profiles spanning a wide range of precipitation gradients, vegetation type/land use and parent materials, from the Northwestern Highlands (NWH) of Cameroon were considered. Soil properties were analyzed following standard procedures. TN had very high coefficients of variation (>35%) in all the reference soil groups (RSGs), with highest mean TN (0.31 ± 0.03%) observed in the A horizons of Acrisols and the lowest (0.05 ± 0.01%) in B horizons of Ferralsols. Variations in TN content were significantly (p < 0.05) influenced by parent material, land use type, precipitation and slope gradient. In surface (A) horizons of all the RSGs, TN correlated positively and significantly with clay (p < 0.05), silt (p < 0.01) and soil organic carbon (SOC) (p < 0.01), and negatively with sand (p < 0.01). This observation was slightly different in subsurface (B) horizons. This study provides data which contributes to a better understanding of soil fertility in tropical highlands. [ABSTRACT FROM AUTHOR]

BackgroundThis study aimed at exploring the epidemiological pattern of imported malaria in China before malaria elimination in 2021, to provide evidence-based data for preventing malaria re-establishment in China.MethodsNine-year surveillance data on imported malaria in four provincial-level administrative divisions (PLADs) (Anhui, Chongqing, Guangxi, and Zhejiang) between 2011 and 2019 were thoroughly collected and analyzed.ResultsA quite stable trend in imported malaria cases between 2011 and 2019 was observed. In total, 6,064 imported patients were included. Plasmodium falciparum was the most frequently reported species (4,575, 75.6%). Cases of malaria were most frequently imported from Western Africa (54.4%). We identified an increasing trend in P. ovale and a persistence of P. vivax infections among the cases of malaria imported from Western Africa. Most patients (97.5%) were 20–50 years old. Among imported malaria infections, the main purposes for traveling abroad were labor export (4,914/6,064, 81.0%) and business trips (649, 10.7%). Most patients (2,008/6,064, 33.1%) first visited county-level medical institutions when they sought medical help in China. More patients were diagnosed within 3 days after visiting Centers for Disease Control and Prevention (CDCs) or entry–exit quarantine facilities (EQFs) (1,147/1609, 71.3%) than after visiting medical institutions (2,182/3993, 54.6%).ConclusionImported malaria still poses a threat to the malaria-free status of China. County-level institutions are the primary targets in China to improve the sensitivity of the surveillance system and prevent the re-establishment of malaria. Health education should focus on exported labors, especially to Western and Central Africa. Increasing trend in P. ovale and persistence of P. vivax infections indicated their underestimations in Western Africa. Efficient diagnostic tools and sensitive monitoring systems are required to identify Plasmodium species in Africa.

Among the 40 genera of Barychelidae, only nine genera are described from the African continent. Thorell (1899) described Ammonius Thorell, 1899 based on a male from Cameroon. In 1965 Benoit added more information from the holotype, with detailed illustrations of the male palp bulb and the eye group. Since then, few taxonomic revisions or new species of Barychelidae have been proposed from the African continent. Ammonius can be distinguished by the strongly pronounced retrolateral lobe of the male cymbium and the aspect of the bilobed spermathecae of the female. We redescribe the holotype male of A. pupulus Thorell, 1899 and describe the female for the first time. Additionally, a new species is described: Ammonius benoiti sp. nov., from Ivory Coast. The morphology of the tarsal setae is presented through SEM photographs. New distribution records of the genus are provided.

Most disability research is conducted in high-income countries, despite much of the world's population living in low- and middle-income countries. Given the flexible nature of qualitative research, studies using this methodology have the potential to provide important insights into how disability is perceived across the globe. The aim of the current study was to synthesize the results of disability research in Western Africa to elucidate prominent themes and identify methodological and participant characteristics. Secondary purposes were to evaluate the quality of included studies. A total of 223 studies were included in this meta-synthesis. Findings reveal a diversity of disability-related themes and a need to increase transparency in reporting qualitative research. Implications and suggestions for future research are discussed. [ABSTRACT FROM AUTHOR]

We relied on local knowledge of fishers in five coastal communities in Ghana to investigate ecological factors that affect fishing for elasmobranchs (sharks and rays) and the changes in the abundance of sharks and rays from 1980 to 2020. We gathered data using participant observation, interviews, focus group discussions, and participatory rural appraisal techniques. The results revealed fisher's understanding of six main ecological conditions, which have been applied over the years to improve fishing and maximize fisher catch: season and weather conditions, lunar phase, bait type, presence of seabirds and fish movement, the color of seawater, and sea current. Most elasmobranch species were abundant in 1980 but became severely depleted as of 2020, except Blue Shark (Prionace glauca) and Devil rays (Mobula spp.), shared by the fishers. We found fishers' local ecological knowledge consistent with scholarly knowledge and call for its inclusion in research, decision-making, and management interventions by biologists and policymakers. [ABSTRACT FROM AUTHOR]

Abstract Hypertension is the leading preventable risk factor for cardiovascular diseases. In Guinea–Bissau there are no previous population‐based hypertension surveys. Therefore, the authors aimed to estimate the prevalence, awareness, treatment, and control of high blood pressure among adults living in Bissau. A sample (n = 973) of dwellers in Bissau, aged 18–69 years, was assembled through stratified and cluster sampling. Patients underwent face‐to‐face interviews and blood pressure measurements following the World Health Organization Stepwise Approach to Chronic Disease Risk Factor Surveillance. The prevalence of hypertension was 26.9%, and 51.4% of hypertensive individuals were aware of their condition, of whom 51.8% reported having received pharmacological treatment in the previous 2 weeks. Among the latter, 49.9% had blood pressure values below 140/90 mm Hg. These findings show that hypertension has become a major public health problem in Guinea‐Bissau, emphasizing the urgent need to develop and implement national strategies for the prevention and management of hypertension.

This study describes the first potential multi-species shark nursery area in Atlantic Africa (Sal Rei Bay – SRB, Boa Vista Island, Cabo Verde). From August 2016 to September 2019, 6162 neonates and juveniles of 5 different shark species were observed in SRB using beach gillnet-based bycatch surveys, namely milk (Rhizoprionodon acutus; n= 4908), scalloped hammerhead (Sphyrna lewini; n= 1035), blacktip (Carcharhinus limbatus; n=115), Atlantic weasel (Paragaleus pectoralis; n= 93) and nurse (Ginglymostoma cirratum; n= 12) sharks. Except for nurse sharks, significant seasonal variations in shark relative abundance were observed, with higher levels being recorded during summer and autumn. These findings, together with local knowledge (interviews to fishermen), denote the consistent use of SRB by juvenile sharks and its preference relative to other areas in the region. Ensuring the protection and conservation of SRB nursery area is especially relevant as, according to IUCN, all identified shark species are threatened with extinction over the near-future – in particular, scalloped hammerheads (critically endangered) and Atlantic weasel sharks (endangered). The effective protection of SRB will not only support the conservation of shark populations, but also of other charismatic fauna (e.g., loggerhead turtles) and broader benthic and pelagic ecosystems.

Africa accounts for 1.5% of the global coronavirus disease 2019 (COVID-19) cases and 2.7% of deaths, but this low incidence has been partly attributed to the limited testing capacity in most countries. In addition, the population in many African countries is at high risk of infection with endemic infectious diseases such as malaria. Our aim is to determine the prevalence and circulation of SARS-CoV-2 variants, and the frequency of co-infection with the malaria parasite. We conducted serological tests and microscopy examinations on 998 volunteers of different ages and sexes in a random and stratified population sample in Burkina-Faso. In addition, nasopharyngeal samples were taken for RT-qPCR of SARS-CoV-2 and for whole viral genome sequencing. Our results show a 3.2 and a 2.5% of SARS-CoV-2 seroprevalence and PCR positivity; and 22% of malaria incidence, over the sampling period, with marked differences linked to age. Importantly, we found 8 cases of confirmed co-infection and 11 cases of suspected co-infection mostly in children and teenagers. Finally, we report the genome sequences of 13 SARS-CoV-2 isolates circulating in Burkina Faso at the time of analysis, assigned to lineages A.19, A.21, B.1.1.404, B.1.1.118, B.1 and grouped into clades; 19B, 20A, and 20B. This is the first population-based study about SARS-CoV-2 and malaria in Burkina Faso during the first wave of the pandemic, providing a relevant estimation of the real prevalence of SARS-CoV-2 and variants circulating in this Western African country. Besides, it highlights the non-negligible frequency of co-infection with malaria in African communities.

This briefing explores anti-fraud measures (AFMs) in Ghana, Nigeria and Sierra Leone. This is the last of three Briefings which examine the characteristics of AFMs across Africa. The findings confirm our earlier analyses concerning major anti-fraud measure drivers, actors, tools and controversies. These measures link matters of corporate competition, branding, consumer protection, industrial policy, capitalism and national politics, and are by now a component of economic policy and governance of various African states. A reflection on the data presented across the three Briefings concludes, and marks the end of the series. [ABSTRACT FROM AUTHOR]

—A new idiocerine leafhopper, Pretioscopusjukwasp. n., is described as the second species of the genus from Ghana. Rotifunkia guttifera (Walker, 1851) is recorded for the first time from Ghana, with notes on its 5th instar larva and host plant. The composition and taxonomic position of Eurymelinae and Idiocerini are discussed. [ABSTRACT FROM AUTHOR]

Vaccination is a proven equitable intervention if people take advantage of the opportunity to get vaccinated. Niger is a low-income country in West Africa, with a 76% measles 1 vaccination coverage rate in 2016. This study was conducted to identify individual- and neighborhood-level factors that could improve measles 1 vaccination coverage in Niamey, the capital. In October 2016, 460 mothers with children aged 12–23 months were surveyed. The outcome was to determine whether the mother's child had been vaccinated against measles 1 or not. For individual-level variables of measles 1 vaccination status, the following were included: mother's age group, mother tongue, maternal education level, husband's job, where the mother gave birth (at home or at a health center) and whether the mother discussed vaccination with friends. Neighborhood-level factors were access time to the health center, household access to electricity, and a grand-mean-centered wealth score. Multilevel logistic regression analysis was performed. At the individual-level, primary and secondary-educated mothers were more likely to vaccinate their children against measles 1 (aOR 1.97, 95% CI 1.11–3.51). At the neighborhood-level, no factors were identified. Therefore, a strengthened focus on equity-based, individual factors is recommended, including individual motivation, prompts and ability to access vaccination services. [ABSTRACT FROM AUTHOR]

Background: Recent global reports highlighted the importance of addressing the quality of care in all settings including fragile and conflict-affected situations (FCS), as a central strategy for the attainment of sustainable development goals and universal health coverage. Increased mortality burden in FCS reflects the inability to provide routine services of good quality. There is also paucity of research documenting the impact of conflict on the quality of care within fragile states including disparities in service delivery. This study addresses this measurement gap by examining disparities in the quality of primary healthcare services in four conflict-affected fragile states using proxy indicators. Methods: A secondary analysis of publicly available data sources was performed in four conflict-affected fragile states: Cameroon, the Democratic Republic of Congo, Mali, and Nigeria. Two main databases were utilized: the Demographic Health Survey and the Uppsala Conflict Data Program for information on components of care and conflict events, respectively. Three equity measures were computed for each country: absolute difference, concentration index, and coefficients of mixed-effects logistic regression. Each computed measure was then compared according to the intensity of organized violence events at the neighborhood level. Results: Overall, the four studied countries had poor quality of PHC services, with considerable subnational variation in the quality index. Poor quality of PHC services was not only limited to neighborhoods where medium or high intensity conflict was recorded but was also likely to be observed in neighborhoods with no or low intensity conflict. Both economic and educational disparities were observed in individual quality components in both categories of conflict intensity. Conclusion: Each of the four conflict-affected countries had an overall poor quality of PHC services with both economic and educational disparities in the individual components of the quality index, regardless of conflict intensity. Multi-sectoral efforts are needed to improve the quality of care and disparities in these settings, without a limited focus on sub-national areas where medium or high intensity conflict is recorded. [ABSTRACT FROM AUTHOR]

The Kara River watershed (KRW), northern Togo, is facing climate-change impacts that have never been clearly characterized. Six decades of rainfall data (1961–2020) from six measuring stations ideally distributed across the watershed were used in this study. The flow records from two stations situated in contrasting locations on the KRW were also used. Statistical tests were conducted to assess the spatial and temporal variability of the rainfall and to detect tendencies within these meteorological series. The water balance method and calculation of the dry-off coefficient and of the groundwater volume drained by rivers allowed evaluating the impact of climatic evolution on surface flow and on groundwater volumes during the six decades studied. The results showed contrasting spatiotemporal variability of rainfall (and of aquifer recharge) over the watershed with a decreasing tendency upstream and an increasing one downstream. At the same time, the water volume drained by the aquifer to sustain the river's base flow decreased from −22% to −36% depending on the measuring station. These results constitute a decision-making tool for Togolese water resource managers and are of primary importance for characterizing the fate of water resources worldwide in regions subject to severe droughts. [ABSTRACT FROM AUTHOR]

Population connectivity influences the distribution of genetic diversity and divergence along a species range, as the likelihood of extinction or differentiation increases in isolated populations. However, there is still poor understanding of the processes mediating inter-population dispersal in marine species that are sessile and lack planktonic life stages. One such case is the seagrass species Halodule wrightii, which produces basal seeds, although detached plants can drift. Along the tropical western coast of Africa, this species occurs in distant discontinuous habitats, raising the question of how interpopulation dispersal is mediated. The species is a key source of ecosystem functions including feeding large migratory grazers. This study aims to infer whether genetic differentiation of the seagrass H. wrightii along the western coast of Africa supports a hypothesis of predominant transportation of rafting seagrass by ocean currents, versus the hypothesis of biotic vectors of dispersal. Additional hypotheses were addressed concerning range-wide clonality and genetic diversity, assessed with microsatellite markers on populations of the west coast of Africa from Mauritania to Angola. Population genetic diversity and structure were compared with predictions from biophysical models of dispersal by oceanographic currents. The genetic data revealed low divergence among most populations, in strong contrast with predictions of very low probability of connectivity mediated by currents along the western African coastline. Moderate to high genotypic diversity showed important seed recruitment, but genetic and genotypic diversities were lower at range edges. Populations north and south of the equator were differentiated, and remarkably, so were neighboring equatorial populations despite their proximity. These results reveal independent sources of colonization of meadows in these islands, which are major habitat for migratory grazing green turtles, also supporting the hypothesis of biotically mediated seed transport. The importance of seagrass for conservation of endangered macrofauna has been widely reported; here we report evidence supporting the reciprocal role, that macrofauna protection can also plays a role in long-term survival and reproductive success of seagrass.

Agriculture plays a vital role in African countries, driving economic growth, employment, and non-agricultural sector improvements. However, persistent food insecurity and poverty among smallholder families raise concerns. Land fragmentation compounds these issues, limiting agricultural productivity and pushing farmers towards off-farm activities, despite Africa's potential agricultural markets. The study's focus is Donomadé, a remote village in southern Togo. This study pursues a dual objective. Firstly, it investigates how household characteristics, including family size and resource availability, influence farmers' resource management decisions. Secondly, the research employs serious games to comprehend farmers' livelihood strategy choices within constrained real-world-like conditions. The iterative and participatory Companion Modelling (ComMod) approach was utilized for the co-design and co-development of a serious game. This involved close collaboration with a local research team from the University of Lomé, a local NGO, and Donomadé village farmers. Various farming systems were characterized, and collective insights into Donomadé's agricultural dynamics were gathered through surveys, interviews, and workshops. Regardless of their in-game roles, farmers prioritize fulfilling basic family needs, such as food security and education instead of investing in agriculture. The study underscores the significance of household composition and resource availability when designing technology interventions or support mechanisms for farmers. Aligning interventions with farmers' overarching goals and challenges can enhance technology adoption. Furthermore, addressing food security remains crucial for sustainable development, as it not only improves human welfare and alleviates hunger but also forms the foundation for comprehensive solutions in the face of climate change, resource constraints, and population growth. This research highlights that heavy investment in agriculture is not the priority for many farmers in southern Togo, despite it being their main source of sustenance and income. Addressing immediate family needs, especially food security, education, and housing, takes precedence over long-term agricultural investments. Given the persistent challenge of food security amidst global uncertainties, addressing these priorities is paramount to stimulate more significant interest in agricultural investment. [Display omitted] • In-game household structure has an impact on the decisions players make. • Regardless of their household structure, players prioritize fulfilling their basic needs before any other investments. • In the context of food insecurity, long-term investment in agricultural innovation is not a priority for farmers. [ABSTRACT FROM AUTHOR]

Hypertension is the leading preventable risk factor for cardiovascular diseases. In Guinea–Bissau there are no previous population‐based hypertension surveys. Therefore, the authors aimed to estimate the prevalence, awareness, treatment, and control of high blood pressure among adults living in Bissau. A sample (n = 973) of dwellers in Bissau, aged 18–69 years, was assembled through stratified and cluster sampling. Patients underwent face‐to‐face interviews and blood pressure measurements following the World Health Organization Stepwise Approach to Chronic Disease Risk Factor Surveillance. The prevalence of hypertension was 26.9%, and 51.4% of hypertensive individuals were aware of their condition, of whom 51.8% reported having received pharmacological treatment in the previous 2 weeks. Among the latter, 49.9% had blood pressure values below 140/90 mm Hg. These findings show that hypertension has become a major public health problem in Guinea‐Bissau, emphasizing the urgent need to develop and implement national strategies for the prevention and management of hypertension. [ABSTRACT FROM AUTHOR]

Background: Measuring and improving equitable access to care is a necessity to achieve universal health coverage. Pre-pandemic estimates showed that most conflict-affected and fragile situations were off-track to meet the Sustainable Development Goals on health and equity by 2030. Yet, there is a paucity of studies examining health inequalities in these settings. This study addresses the literature gap by applying a conflict intensity lens to the analysis of disparities in access to essential Primary Health Care (PHC) services in four conflict-affected fragile states: Cameroon, Democratic Republic of Congo, Mali and Nigeria. Methods: For each studied country, disparities in geographic and financial access to care were compared across education and wealth strata in areas with differing levels of conflict intensity. The Demographic Health Survey (DHS) and the Uppsala Conflict Data Program were the main sources of information on access to PHC and conflict events, respectively. To define conflict intensity, household clusters were linked to conflict events within a 50-km distance. A cut-off of more than two conflict-related deaths per 100,000 population was used to differentiate medium or high intensity conflict from no or low intensity conflict. We utilized three measures to assess inequalities: an absolute difference, a concentration index, and a multivariate logistic regression coefficient. Each disparity measure was compared based on the intensity of conflict the year the DHS data was collected. Results: We found that PHC access varied across subnational regions in the four countries studied; with more prevalent financial than geographic barriers to care. The magnitude of both educational and wealth disparities in access to care was higher with geographic proximity to medium or high intensity conflict. A higher magnitude of wealth rather than educational disparities was also likely to be observed in the four studied contexts. Meanwhile, only Nigeria showed statistically significant interaction between conflict intensity and educational disparities in access to care. Conclusion: Both educational and wealth disparities in access to PHC services can be exacerbated by geographic proximity to organized violence. This paper provides additional evidence that, despite limitations, household surveys can contribute to healthcare assessment in conflict-affected and fragile settings. [ABSTRACT FROM AUTHOR]

During 2015–2016, Cape Verde, an island nation off the coast of West Africa, experienced a Zika virus (ZIKV) outbreak involving 7,580 suspected Zika cases and 18 microcephaly cases. Analysis of the complete genomes of 3 ZIKV isolates from the outbreak indicated the strain was of the Asian (not African) lineage. The Cape Verde ZIKV sequences formed a distinct monophylogenetic group and possessed 1–2 (T659A, I756V) unique amino acid changes in the envelope protein. Phylogeographic and serologic evidence support earlier introduction of this lineage into Cape Verde, possibly from northeast Brazil, between June 2014 and August 2015, suggesting cryptic circulation of the virus before the initial wave of cases were detected in October 2015. These findings underscore the utility of genomic-scale epidemiology for outbreak investigations.

Grammacephalus rahmani Singh Pruthi, 1930 is recorded for the first time from the United Arab Emirates and Mali, G. raunoi Viraktamath, 1981 – from the United Arab Emirates, and G. indicus Viraktamath et Ananta Murthy, 1999 – from Afghanistan. Photos of these species are provided, and male genitalia of G. rahmani and female 7th sternite of G. indicus are illustrated. Distribution and composition of the genus Grammacephalus Haupt is discussed.

Western Africa is vulnerable to arboviral disease transmission, having recently experienced major outbreaks of chikungunya, dengue, yellow fever and Zika. However, there have been relatively few studies on the natural history of the two major human arbovirus vectors in this region, Aedes aegypti and Ae. albopictus, potentially limiting the implementation of effective vector control. We systematically searched for and reviewed relevant studies on the behaviour and ecology of Ae. aegypti and Ae. albopictus in Western Africa, published over the last 40 years. We identified 73 relevant studies, over half of which were conducted in Nigeria, Senegal, or Côte dʼIvoire. Most studies investigated the ecology of Ae. aegypti and Ae. albopictus, exploring the impact of seasonality and land cover on mosquito populations and identifying aquatic habitats. This review highlights the adaptation of Ae. albopictus to urban environments and its invasive potential, and the year-round maintenance of Ae. aegypti populations in water storage containers. However, important gaps were identified in the literature on the behaviour of both species, particularly Ae. albopictus. In Western Africa, Ae. aegypti and Ae. albopictus appear to be mainly anthropophilic and to bite predominantly during the day, but further research is needed to confirm this to inform planning of effective vector control strategies. We discuss the public health implications of these findings and comment on the suitability of existing and novel options for control in Western Africa.

Health risks associated to the use of tropical wildlife have so far been envisioned through the lens of zoonotic pathogens spread by the bushmeat trade, putting aside the equally vibrant network of traditional medicine markets (TMMs). We collected information on the preservative techniques used for animal body parts from TMMs in Benin through a semi-structured questionnaire addressed to 45 sellers. We show that a recent shift from traditional preservative techniques using harmless treatments towards modern techniques –involving the recurrent use of hazardous chemicals (such as Sniper)– is likely to pose a serious health risk to practitioners and consumers of animal parts from TMMs in Benin. We conclude that the non-regulation of the TMM activities represents a critical risk to both biodiversity conservation and human health in western Africa.

In the early nineteenth century a centralized political entity, the Galinhas kingdom, emerged in southernmost Sierra Leone. Based on sources from Cuban, British, American, Spanish, and Sierra Leonean archives, this article examines the factors accounting for the emergence and consolidation of Galinhas. I argue that the postabolitionist (1808) redeployment of North Atlantic slave trading actors, networks, routes, and spaces, particularly the connection with Cuba and resources from the island, created the conditions for Galinhas's commercial growth and the centralization of its political power. I then problematize the relationship between warfare, the Atlantic slave trade, and state making. During the foundation of a predatory state, before a slaving and political frontier existed, wars were detrimental to trade. When warfare and commerce — or any social activity — coexisted in the same physical space, the interdependent balance between them, which supported the slave trade itself, was disrupted. After the end of the war, political stability boosted slave trading operations. [ABSTRACT FROM AUTHOR]

Using a meta-synthesis approach, through the review of current literature, five published and peer reviewed qualitative research reports were studied. The intention was to identify interventions being used with West African children who have endured adverse childhood experiences. These results were found through matching inclusionary criteria and all studies were screened for appropriateness and relevance to the topic matter. The literature was analyzed across five online databases including Proquest, PsychInfo, Scopus, Wiley, and Springer from January 2005 to June 2020. The authors found minimal evidence indicating interventions used in West Africa for adverse experiences related specifically to children, but found themes related to interventions that serve West African families that include children. Findings were thematically analyzed through meta-synthesis and identified four themes used in the interventions, which include western, spiritual, expressive arts, and cultural approaches. West African children endure adverse experiences such as terrorism, abuse, and war violence that contribute to an increasing the need for mental health interventions. These experiences approached from western, spiritual, expressive arts, and cultural vantage points were identified but limited in information about delivery and efficacy, thus providing little guidance regarding further exploratory research.

This article uses demographic data from nineteenth-century Angola to evaluate, within a West Central African setting, the widely accepted theory that sub-Saharan Africa's integration within the Atlantic world through slave and commodity trading caused significant transformations in slavery in the subcontinent. It specifically questions, first, whether slaveholding became more dominant in Angola during the last phase of the transatlantic slave trade; second, whether Angolan slave populations were predominantly female; and third, whether slavery in Angola expanded further during the cash crop revolution that accompanied the nineteenth-century suppression of the Atlantic slave trade. Besides making a significant contribution to understanding the demographic context of slavery in the era of abolition, the article aims to display ways in which historians can use the population surveys the Portuguese Empire carried out in Africa from the late eighteenth century. [ABSTRACT FROM AUTHOR]

Recentemente, o governo brasileiro foi consultado pela Organização das Nações Unidas (ONU) e tem realizado estudos no sentido de participar da Missão Multidimensional Integrada das Nações Unidas para a estabilização da RCA (MINUSCA) com envio de tropas. Nesse contexto, o presente artigo tem por objetivo analisar a questão centro-africana, concluindo sobre sua influência na geopolítica brasileira para a África. Inicialmente, foi analisada a questão centro-africana. Em seguida, foram descritas as principais ações geopolíticas do Brasil para a África, conforme preconiza a Política Nacional de Defesa, a Estratégia Nacional de Defesa e as diretrizes de política externa do Ministério das Relações Exteriores. Por fim, relacionou-se a questão centro-africana com as ações geopolíticas do Brasil na África, a fim de se solucionar o problema proposto e no intuito de avaliar a viabilidade da participação de tropas brasileiras na MINUSCA, sob a ótica da geopolítica.

The Kara River watershed (KRW), northern Togo, is facing climate-change impacts that have never been clearly characterized. Six decades of rainfall data (1961–2020) from six measuring stations ideally distributed across the watershed were used in this study. The flow records from two stations situated in contrasting locations on the KRW were also used. Statistical tests were conducted to assess the spatial and temporal variability of the rainfall and to detect tendencies within these meteorological series. The water balance method and calculation of the dry-off coefficient and of the groundwater volume drained by rivers allowed evaluating the impact of climatic evolution on surface flow and on groundwater volumes during the six decades studied. The results showed contrasting spatiotemporal variability of rainfall (and of aquifer recharge) over the watershed with a decreasing tendency upstream and an increasing one downstream. At the same time, the water volume drained by the aquifer to sustain the river’s base flow decreased from −22% to −36% depending on the measuring station. These results constitute a decision-making tool for Togolese water resource managers and are of primary importance for characterizing the fate of water resources worldwide in regions subject to severe droughts.

During Zimbabwe's struggle for national liberation, thousands of black African students fled Rhodesia to universities across the world on refugee scholarship schemes. To these young people, university student activism had historically provided a stable route into political relevance and nationalist leadership. But at foreign universities, many of which were vibrant centres for student mobilisations in the 1960s and 1970s and located far from Zimbabwean liberation movements' organising structures, student refugees were confronted with the dilemma of what their role and future in the liberation struggle was. Through the concept of the 'frontier', this article compares the experiences of student activists at universities in Uganda, West Africa, and the UK as they figured out who they were as political agents. For these refugees, I show how political geography mattered. Campus frontiers could lead young people both to the military fronts of Mozambique and Zambia as well as to the highest circles of government in independent Zimbabwe. As such, campus frontiers were central to the history of Zimbabwe's liberation movements and the development of the postcolonial state. [ABSTRACT FROM AUTHOR]

This article explores the empirical relevance of researching outside‐in politicization processes in European studies. To this end, it examines to what extent and how civil society organizations (CSOs) have contributed to the politicization of EU policies towards Western Africa in two cases: the negotiation of Economic Partnership Agreements and the EU's engagement with the G5 Sahel. CSOs were strongly engaged in the trade negotiations, while they were largely excluded from the G5 Sahel process. In both cases this was due to CSOs' own initiatives, or the absence thereof, with these strongly linked to being either invited or discouraged by official actors. The article argues that authority transfer and the domestic context – including state fragility and state–society relations – are relevant to explaining the (non‐)involvement of CSOs in outside‐in politicization. [ABSTRACT FROM AUTHOR]

The status (weed or beneficial shrub) of Chromolaena odorata in West Africa has been a major subject of debate since its introduction in the 1930s. Its negative impacts on agriculture and biodiversity are clear. However, indigenous people have harnessed several benefits of the plant, making management strategies less straightforward. Using indigenous voices in Ghana, the current perceptions of C. odorata in West Africa were assessed. Here, 90 respondents in three regions of Ghana were interviewed, using questionnaires, on aspects relating to the abundance, perceptions and management of C. odorata in their communities. Overall, results showed that the density of C. odorata had declined. The majority of the respondents considered C. odorata as a fallow shrub, a medicinal plant or both. However, impacts on crop production and injuries incurred during physical control were also highlighted. The local uses of the plant in Ghana included treating fevers and injuries, and as a fallow shrub for soil nutrient replenishment. Although most of the respondents classified C. odorata as a useful shrub in Ghana, they also highlighted the use of local farming tools such as cutlasses for the slash of the plant. The use of herbicides for the control of C. odorata was rare and not applied specifically for C. odorata. In conclusion, local awareness programmes on the deleterious impacts of C. odorata on ecosystem functioning and livelihoods are required for its effective management in West Africa. [ABSTRACT FROM AUTHOR]

Diopatra Audouin & Milne-Edwards, 1833 is a species rich genus that is common in tropical and subtropical regions. The genus is readily identified by its striking, spiral branchiae, but species identification has historically been challenging due to a high variation in diagnostic characters used. This study aims to reconstruct the phylogeny of Diopatra with molecular markers and assess the species diversity of West African Diopatra with the species delimitation programs bPTP and BPP. Specimens were collected from Morocco to Angola, and the markers COI, 16S and 28S were sequenced from 76 specimens. The constructed phylogeny retrieved Diopatra as monophyletic, as well as five well supported clades within the genus. All clades were defined by morphological characters, some of which have previously not been considered to have high phylogenetic or taxonomical value. Species delimitation analyses recovered 17 new species, several of which were not readily identified morphologically. One species complex comprising between one and 12 species was left unresolved due to incongruence between the species delimitation methods and challenging morphology. Our results indicate that the diversity of Diopatra is significantly underestimated, where this regional study near to doubled the number ofknown species from the East Atlantic.

Recent research points to a renewed scholarly interest in the West African Middle Ages and the Sahelian imperial tradition. However, in these works only tangential attention is paid to the role of Muslims, and especially to clerical communities. This essay tackles theoretical and historiographical insights on the role of African Muslims in the era of the medieval empires and argues that the study of Islam in this region during the Middle Ages still suffers from undertheorizing. On the contrary, by using a 'discursive approach' scholars can unravel access to fascinating aspects of the history of West African Muslims and in particular to the crucial role played by clerical communities, who represented one node of the web of diffused authority which is characteristic of precolonial West African social and political structures. [ABSTRACT FROM AUTHOR]

Objective: This study aimed to describe intrapartum and postpartum exposures possibly associated with the risk of in-hospital maternal mortality in Guinea.Study Design: Data were collected in the Western Sub-Saharan Africa setting at the university hospital in Conakry, Guinea, during 2016-2017. Case-control study design was applied. The cases comprised all intrapartum and postpartum maternal deaths recorded during the study period. The controls were selected by random sampling from patients discharged alive following hospitalization due to vaginal delivery or cesarean section. Maternal mortality ratio (MMR) was defined as a quotient of the number of maternal deaths per 100,000 live births. Multivariable logistic regression was applied to generate odds ratios (OR) and 95 % confidence intervals (95 %CI).Results: A total of 10,208 live births and 144 maternal deaths were recorded. The MMR was at 1411 per 100,000 live births. The main causes of maternal death included postpartum hemorrhage (56 %), retroplacental hematoma (10 %), and eclampsia (9%). The ORs of maternal death were significantly elevated in case of transfer from another hospital (OR 24.60, 95 %CI 11.32-53.46), misoprostol-induced labor (OR 4.26, 95 %CI 2.51-7.91), non-use of partogram (OR 3.70, 95 %CI 1.31-5.20), duration of labor ≥24 h (OR 2.87, 95 %CI 1.35-5.29), and positive history of cesarean section (OR 2.54, 95 %CI 1.12-6.19).Conclusion: To stop preventable maternal mortality in Sub-Saharan Africa, continued efforts are needed to provide perinatal monitoring, to reorganize the obstetric reference system, and to decrease the number of avoidable cesarean sections. Furthermore, the internal supervision of misoprostol doses used for labor induction should be a priority. [ABSTRACT FROM AUTHOR]

Background Manual white blood cell (WBC) differential counts as a predictor for neonatal sepsis development in a low-resource setting have not been thoroughly evaluated. We hypothesized that manual differentiation (specifically immature:total [I:T] neutrophil ratios) would be feasible and useful as an adjunct to predict early-onset neonatal sepsis (EONS). Secondarily, we hypothesized that vaccination with bacillus Calmette-Guérin (BCG) and oral polio vaccine (OPV) could alter WBC differential counts and thus might reduce its predictive performance. Methods We performed a prospective cohort study within a randomized trial, randomizing healthy, high-risk newborns admitted to the nursery at the national hospital in Guinea-Bissau 1:1 to BCG+OPV at admission or at discharge (usual practice). Thin capillary blood films were prepared at 2 d of age in a subset of 268 neonates. WBC counts were assessed by microscopy and neonates were followed up for sepsis development within 2 weeks. Results Ninety-eight percent (264/268) of smears provided interpretable reads. Of the 264 children, 136 had been randomized to receive BCG+OPV prior to sampling; the remaining 128 were vaccinated at discharge. The I:T ratio (average 0.017) was lower among children who did not develop clinical sepsis but did not predict sepsis (p=0.70). Only three children had an I:T ratio >0.2 (associated with a higher probability of clinical sepsis in previous studies) but did not develop sepsis. Immunization did not alter WBC composition. Conclusions Manual WBC differentials are feasible in low-resource settings. WBC differentials are not affected by standard newborn immunization. However, the I:T ratio had no value in predicting subsequent development of sepsis. [ABSTRACT FROM AUTHOR]

West African livestock keepers need forage sources to feed animals without degrading the local fragile ecosystems. Establishing high-density forage protein banks for animal feeding was evaluated in three contrasting zones of Burkina Faso. The agronomic performance of the fodder species Leucaena leucocephala (leucaena) and Morus alba (mulberry), planted for intensive forage production (25,000 plants/ha) was monitored through plant height (HEI), stem diameter (DIA), branch number (BrN) and branch length (BrL). Once plots were considered established (at 7 months) all trees were coppiced. Biomass yield subsequently was monitored over three bi-monthly harvests which began approximately 1 year after planting. For both species, a highly significant interaction between experimental site and dates was observed for all variables except BrN. Average HEI (103 cm) were similar. DIA (7 ± 0.4 cm) and BrL (55 ± 2.2 cm) were higher in mulberry (6 ± 0.1 and 29 ± 1.0 cm, respectively), whereas the BrN remained higher in leucaena (7 ± 0.2 vs. 2 ± 0.1 cm). No differences were observed in HEI between sites from June to August. However, from September to October, both species displayed a stronger growth rate at site 1. The biomass yields (t DM/ha/year) in three consecutive harvests were lower than values reported in other tropical regions (1.8 ± 1.2 and 8.1 ± 3.9, for mulberry and leucaena, respectively). Differences between sites were due mainly to soil properties, rainfall pattern and termite attacks. This study demonstrated that L. leucocephala and M. alba, planted in high-density forage banks, successfully establish and have high forage yield across several edaphoclimatic conditions in Burkina Faso. Our findings suggest that this technology could significantly contribute to livestock feeding systems in the region, thus reducing negative effects of over-grazing on landscape degradation. [ABSTRACT FROM AUTHOR]

Cetaceans constitute a textbook example of the secondary adaptation of tetrapods to aquatic life. This major event in the evolutionary history of mammals is often linked in the literature to the limb‐to‐fin transition. Paradoxically, limb bones are scarce in the fossil record of early cetaceans, and the transition from a limb‐adapted morphology for an amphibious life in shallow water to a fin‐adapted morphology for a pelagic lifestyle remains poorly documented. Here, we describe new protocetid remains from the upper Lutetian of Senegal, including a nearly complete articulated forelimb. A cladistic analysis including 24 taxa and 137 morphological characters recovers the new African specimen close to Carolinacetus. It also confirms that cetacean dispersal to the New World was not the result of a single colonization event. A 3D model of the forelimb was reconstructed. Anatomical comparisons suggest that it is unlikely that the Senegalese forelimb was used as a rigid pectoral flipper for steering as in basilosaurids and modern cetaceans. Instead, we suggest that the hand was actively used during swimming. This challenges previous reconstructions of protocetids as mainly foot‐powered swimmers, and suggests that swimming specializations of early cetaceans were probably more diverse than previously considered. [ABSTRACT FROM AUTHOR]