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Abstract: In the present work, the experimental characterization of the pseudo-binary PbO–Bi2O3 cut has been performed by differential thermal analysis (DTA), isothermal annealing, powder X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). A thermodynamic assessment according to the Calphad method was also performed based on the present results as well as previous experimental data using the ThermoCalc software. [Copyright &y& Elsevier]

Background and aims: Neutrophins are involved in somatic and visceral hypersensitivity. The action of nerve growth factor (NGF) on sensory neurones contributes to the development of referred colonic hypersensitivity induced by trinitrobenzene sulfonic acid (TNBS). Based on data on brain derived neurotrophic factor (BDNF) and calcitonin gene related peptide (CGRP) in pain, the aims of the present study were: (1) to investigate the involvement of BDNF and CGRP in this model of referred colonic hypersensitivity, (2) to test the effect of exogenous BDNF and CGRP on the colonic pain threshold, and (3) to investigate the relationship between BDNF, NGF, and CGRP by testing antineurotrophin antibodies or h-CGRP 8-37 (a CGRP antagonist) on bowel hypersensitivity induced by these peptides. Methods: Colonic sensitivity was assessed using a colonic distension procedure. Results: Anti-BDNF antibody and h-CGRP 8-37 reversed the induced decrease in colonic threshold (33.4 (2.1) and 40.3 (4.1) mm Hg, respectively, compared with a vehicle score of approximately 18 mm Hg; p<0.001). BDNF (1–100 ng/rat intraperitoneally) induced a significant dose dependent decrease in colonic reaction threshold in healthy rats. This effect was reversed by an anti-BDNF antibody and an anti-NGF antibody (33.4 (0.6) v 18.7 (0.7) mm Hg (p<0.001), anti-NGF v vehicle). NGF induced colonic hypersensitivity was reversed by h-CGRP 8-37 but not by the anti-BDNF antibody. Finally, antineurotrophin antibody could not reverse CGRP induced colonic hypersensitivity (at a dose of 1 μg/kg intraperitoneally). Conclusion: Systemic BDNF, NGF, and CGRP can induce visceral hypersensitivity alone and interactively. This cascade might be involved in TNBS induced referred colonic hypersensitivity in which each of these peptides is involved. [ABSTRACT FROM AUTHOR]

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The reform discussion in Senegalese language planning indicates a review of the situation, which cannot be done without due attention to previous debates regarding the significance of African languages in the postcolonial culture and educational politics.

Background: Maternal and perinatal mortality are major problems for which progress in sub-Saharan Africa has been inadequate, even though childbirth services are available, even in the poorest countries. Reducing them is the aim of two of the main Millennium Development Goals. Many initiatives have been undertaken to remedy this situation, such as the Advances in Labour and Risk Management (ALARM) International Program, whose purpose is to improve the quality of obstetric services in low-income countries. However, few interventions have been evaluated, in this context, using rigorous methods for analyzing effectiveness in terms of health outcomes. The objective of this trial is to evaluate the effectiveness of the ALARM International Program (AIP) in reducing maternal mortality in referral hospitals in Senegal and Mali. Secondary goals include evaluation of the relationships between effectiveness and resource availability, service organization, medical practices, and satisfaction among health personnel.Methods/design: This is an international, multi-centre, controlled cluster-randomized trial of a complex intervention. The intervention is based on the concept of evidence-based practice and on a combination of two approaches aimed at improving the performance of health personnel: 1) Educational outreach visits; and 2) the implementation of facility-based maternal death reviews. The unit of intervention is the public health facility equipped with a functional operating room. On the basis of consent provided by hospital authorities, 46 centres out of 49 eligible were selected in Mali and Senegal. Using randomization stratified by country and by level of care, 23 centres will be allocated to the intervention group and 23 to the control group. The intervention will last two years. It will be preceded by a pre-intervention one-year period for baseline data collection. A continuous clinical data collection system has been set up in all participating centres. This, along with the inventory of resources and the satisfaction surveys administered to the health personnel, will allow us to measure results before, during, and after the intervention. The overall rate of maternal mortality measured in hospitals during the post-intervention period (Year 4) is the primary outcome. The evaluation will also include cost-effectiveness. [ABSTRACT FROM AUTHOR]

A cross-sectional survey was conducted at Polytechnic High School (PHS) to assess the spread of COVID-19 infection among students and staff. A random cluster sampling was conducted between May 19 and August 18, 2022, after the fourth wave of COVID-19 in Senegal. IgM and IgG SARS-CoV-2 antibodies were screened using WANTAI SARS-CoV-2 ELISA assays. Seroprevalence and descriptive statistics were calculated, and associations between seropositivity and different factors were determined using logistic regression. A total of 637 participants were recruited and the median age was 21 years [18-63]. 62.0% of the participants were female, and 36.89% were male, with a male-to-female ratio = 0.59. The overall IgG and IgM seroprevalence were 92% and 6.91% respectively. Among those who tested positive for IgM, 6.75% were also positive for IgG, and 0.15% were negative for IgG. Interestingly, 6.90% of participants tested negative for both IgM and IgG. We found a higher IgM seroprevalence in men than women (9.4% vs. 5.6%) and a lower IgM seroprevalence in (18-25) age group compared to (55-65) years. We revealed a significant difference according to IgG seroprevalence among participants who declared fatigue symptoms [92.06% (95% CI: 89.96-94.16)] compared to those who did not [80.39% (95% CI: 77.31-83.47)], p = 0.0027. IgM seropositivity was found to be associated with Body Mass Index (BMI) categories (O.R. 0.238, p = 0.043), ethnic group (O.R. 0.723, p = 0.046), and marital status (O.R. 2.399, p = 0.021). Additionally, IgG seropositivity was linked to vaccination status (O.R. 4.741, p < 0.001). Our study found that most students and staff at PHS were exposed to SARS-CoV-2, confirming the virus's circulation at the time of the survey. We also identified differences in individual susceptibility that need further clarification. Our results highlight the importance of seroepidemiological surveys to assess the true impact of the COVID-19 pandemic in a community and to monitor variations in antibody response., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 THIAM et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

In West Africa, research on the hepatitis E virus (HEV) is barely covered, despite the recorded outbreaks. The low level of access to safe water and adequate sanitation is still one of the main factors of HEV spread in developing countries. HEV infection induces acute or sub-clinical liver diseases with a mortality rate ranging from 0.5 to 4%. The mortality rate is more alarming (15 to 25%) among pregnant women, especially in the last trimester of pregnancy. Herein, we conducted a multicentric socio-demographic and seroepidemiological survey of HEV in Senegal among pregnant women. A consecutive and non-redundant recruitment of participants was carried out over the period of 5 months, from March to July 2021. A total of 1227 consenting participants attending antenatal clinics responded to a standard questionnaire. Plasma samples were collected and tested for anti-HEV IgM and IgG by using the WANTAI HEV-IgM and IgG ELISA assay. The overall HEV seroprevalence was 7.8% (n = 96), with 0.5% (n = 6) and 7.4% (n = 91) for HEV IgM and HEV IgG, respectively. One of the participant samples was IgM/IgG-positive, while four were declared indeterminate to anti-HEV IgM as per the manufacturer’s instructions. From one locality to another, the seroprevalence of HEV antibodies varied from 0 to 1% for HEV IgM and from 1.5 to 10.5% for HEV IgG. The data also showed that seroprevalence varied significantly by marital status (p < 0.0001), by the regularity of income (p = 0.0043), and by access to sanitation services (p = 0.0006). These data could serve as a basis to setup national prevention strategies focused on socio-cultural, environmental, and behavioral aspects for a better management of HEV infection in Senegal.

Background: Sub-Saharan Africa is experiencing a rising burden of hypertension. Antihypertensive medications and diet are the cornerstone of effective hypertension control., Aims: To assess adherence to medication and salt restriction in 12 sub-Saharan countries, and to study the relationship between adherence and blood pressure control in patients with hypertension., Methods: We conducted a cross-sectional survey in urban clinics in twelve sub-Saharan countries. Data were collected on demographics, treatment and adequacy of blood pressure control in patients with hypertension attending the clinics. Adherence was assessed by questionnaires completed by the patients. Hypertension grades were defined according to European Society of Cardiology guidelines. Association between adherence and blood pressure control was investigated using multilevel logistic regression analysis, adjusting for age, sex and country., Results: Among the 2198 patients, 77.4% had uncontrolled blood pressure, 34.0% were poorly adherent to salt restriction, 64.4% were poorly adherent to medication and 24.6% were poorly adherent to both. Poor adherence to salt restriction (odds ratio [OR] 1.33, 95% confidence interval [CI] 1.03-1.72), medication (OR 1.56, 95% CI 1.25-1.93) or both (OR 1.91 1.39-2.66) was related to uncontrolled blood pressure. Moreover, poor adherence to both medication and salt restriction was related to a 1.52-fold (95% CI 1.04-2.22), 1.8-fold (95% CI 1.22-2.65) and 3.08-fold (95% CI 2.02-4.69) increased likelihood of hypertension grade 1, 2 and 3, respectively., Conclusions: High levels of poor adherence to salt restriction and medication were noted in this urban sub-Saharan study; both were significantly associated with uncontrolled blood pressure, representing major opportunities for intervention to improve hypertension control in sub-Saharan Africa., (Copyright © 2020 Elsevier Masson SAS. All rights reserved.)

Background: This research assessed the potential for expanding access to family planning through private sector pharmacies in Senegal, by examining the quality of the services provided through private sector pharmacies, and pharmacy staff and client interest in private sector pharmacy-based family planning services. Methods: This was a cross-sectional, descriptive study conducted in eight urban districts in and around Dakar and two urban districts outside of Dakar employing an audit of 225 pharmacies, a survey with 486 private sector pharmacy staff and a survey with 3,567 women exiting private sector pharmacies. Results: Most (54%) pharmacies reported offering method-specific counseling to clients. Family planning  commodities were available in all pharmacies, and 72% had a private space available to offer counseling. Three quarters (76%) did not have any counseling materials available. 49% of pharmacists and 47% of assistant pharmacists reported receiving training on family planning during their professional studies. Half had received counseling training. Few pharmacists met pre-determined criteria to be considered highly knowledgeable of the oral contraceptive pill (OCP) and injectable contraceptive provision (0.6% and 1.1%). Overall, 60% of women surveyed were current family planning users and 11% procured their method through a private sector pharmacy. Among non-users of family planning, and current users who did not obtain their method through a pharmacy, 47% said they would be interested in procuring a method through a private sector pharmacy. Conclusions: There is both actual and latent demand for accessing family planning through Senegal's urban, private sector pharmacies. With proper training, pharmacy staff could better provide effective counseling and provision of OCPs and injectables, and lifting the requirement for a prescription could help support gains in contraceptive prevalence., Competing Interests: No competing interests were disclosed., (Copyright: © 2019 Peterson J et al.)

Background: This research assessed the potential for expanding access to family planning through private sector pharmacies in Senegal, by examining the quality of the services provided through private sector pharmacies, and pharmacy staff and client interest in private sector pharmacy-based family planning services. Methods: This was a cross-sectional, descriptive study conducted in eight urban districts in and around Dakar and two urban districts outside of Dakar employing an audit of 225 pharmacies, a survey with 486 private sector pharmacy staff and a survey with 3,567 women exiting private sector pharmacies. Results: Most (54%) pharmacies reported offering method-specific counseling to clients. Family planning  commodities were available in all pharmacies, and 72% had a private space available to offer counseling. Three quarters (76%) did not have any counseling materials available. 49% of pharmacists and 47% of assistant pharmacists reported receiving training on family planning during their professional studies. Half had received counseling training. Few pharmacists met pre-determined criteria to be considered highly knowledgeable of the oral contraceptive pill (OCP) and injectable contraceptive provision (0.6% and 1.1%). Overall, 60% of women surveyed were current family planning users and 11% procured their method through a private sector pharmacy. Among non-users of family planning, and current users who did not obtain their method through a pharmacy, 47% said they would be interested in procuring a method through a private sector pharmacy. Conclusions: Senegal's urban, private sector pharmacies are well-positioned to meet the increasing desire for modern contraception. With proper training, pharmacy staff could better provide effective counseling and provision of OCPs and injectables, and lifting the requirement for a prescription could help support gains in contraceptive prevalence., Competing Interests: No competing interests were disclosed.

Background: In sub-Saharan Africa, lack of motivation and job dissatisfaction have been cited as causes of poor healthcare quality and outcomes. Measurement of health workers' satisfaction adapted to sub-Saharan African working conditions and cultures is a challenge. The objective of this study was to develop a valid and reliable instrument to measure satisfaction among health professionals in the sub-Saharan African context., Methods: A survey was conducted in Senegal and Mali in 2011 among 962 care providers (doctors, midwives, nurses and technicians) practicing in 46 hospitals (capital, regional and district). The participation rate was very high: 97% (937/962). After exploratory factor analysis (EFA), construct validity was assessed through confirmatory factor analysis (CFA). The discriminant validity of our subscales was evaluated by comparing the average variance extracted (AVE) for each of the constructs with the squared interconstruct correlation (SIC), and finally for criterion validity, each subscale was tested with two hypotheses. Two dimensions of reliability were assessed: internal consistency with Cronbach's alpha subscales and stability over time using a test-retest process., Results: Eight dimensions of satisfaction encompassing 24 items were identified and validated using a process that combined psychometric analyses and expert opinions: continuing education, salary and benefits, management style, tasks, work environment, workload, moral satisfaction and job stability. All eight dimensions demonstrated significant discriminant validity. The final model showed good performance, with a root mean square error of approximation (RMSEA) of 0.0508 (90% CI: 0.0448 to 0.0569) and a comparative fit index (CFI) of 0.9415. The concurrent criterion validity of the eight dimensions was good. Reliability was assessed based on internal consistency, which was good for all dimensions but one (moral satisfaction < 0.70). Test-retest showed satisfactory temporal stability (intra class coefficient range: 0.60 to 0.91)., Conclusions: Job satisfaction is a complex construct; this study provides a multidimensional instrument whose content, construct and criterion validities were verified to ensure its suitability for the sub-Saharan African context. When using these subscales in further studies, the variability of the reliability of the subscales should be taken in to account for calculating the sample sizes. The instrument will be useful in evaluative studies which will help guide interventions aimed at improving both the quality of care and its effectiveness.

Objectives: Although community-based health insurance (CBHI) seemed promising to improve access to health care, its implementation has been slow and laborious. We hypothesize that the existing tension between the competing objectives of solidarity and financial sustainability that are pursued by CBHI may partly account for this. This paper aims to evaluate if there is a gap between CBHI subscribers' values and their promoters', and to determine which characteristics of subscribers and CBHIs are associated with their values., Methods: A study of all Senegal CBHI organizations was undertaken in 2002. The analysis includes: 1) content of interviews with subscribers and promoters; and 2) multilevel logistical analysis of the links between characteristics of subscribers (n = 394) and organizations (n = 46) and composite indicators representing values (redistribution, solidarity when difficulties, solidarity between healthy and unhealthy)., Results: Promoters emphasize financial sustainability; subscribers are split between financial sustainability and solidarity. Men, polygamous families and individuals with a lower socio-professional status are twice as likely to be in favour of redistribution; subscribers who participate in decision-making and those who think their CBHI is facing difficulties are less in favour of solidarity. At CBHI level, although the variance was significant, none of the variables were retained., Conclusion: More attention should be given to reducing the gap between promoters' and subscribers' values, and to increasing member participation in the processes involved in implementing CBHI. This could help all actors involved to understand and improve determinants of enrolment in, and performance of CBHI, thus increasing access to health care for vulnerable populations in developing countries.

Objectives: To document the level of HIV infection in Senegal and also to review evidence of the impact of efforts in prevention, developed by the National AIDS Control Programme and the Civil Society, on the level of the HIV epidemic., Methods: Research, compilation and critical review of all relevant data on HIV and sexually transmission diseases (STDs) epidemiology, sexual behaviour, and the efforts in prevention developed in Senegal., Results: From 1989 to 1996, the levels of HIV infection estimated in four sentinel urban regions remained stable at around 1.2% in the population of pregnant women, and at 3% in male STD patients. It had increased to 19% in female sex workers. A strong political and community commitment led to an early response to the HIV/AIDS epidemic that has been extended since 1986. Blood transfusion safety was established at the start of the HIV epidemic. The level of knowledge of preventive practices relating to HIV/AIDS among the general population exceeded 90% in the early 1990s. From 1991 to 1996, a 30% to 66% decrease of the STD prevalence rates was observed in pregnant women and sex workers in Dakar. In 1997, 33% of men aged 15-49 years in Dakar reported having had sex with non-regular partners. Among them 67% reported condom use., Conclusions: It is not possible to know what the course of the HIV epidemic in Senegal would have taken in the absence of efforts at prevention. Certainly, several factors that pre-dated the occurrence of AIDS in Senegal laid the groundwork for a positive response. However, data from a number of sources do reveal the successfulness of efforts in prevention. From available data, Senegal can rightfully claim to have contained the spread of HIV by intervening early and comprehensively to increase knowledge and awareness of HIV/AIDS and to promote safe sexual behaviour.