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Tests were carried out to demonstrate the effects of remineralization on biological treatment performances. Chlorine demand and the potential for the formation of trihalomethanes, haloacetic acid, haloacetonitriles and chloropicrin were monitored. An increase in alkalinity of the waters results in a better removal of many disinfection by-products, both by ozonation and biodegradation. For example, the reduction in the precursors of the trihalomethanes, haloacetonitriles and acetic acids was 21, 50 and 28%, respectively, in the non-remineralized waters (alkalinity of 25 mg/L CaCO3). In the waters remineralized at 250 mg/L CaCO3, these reductions were even greater: 30, 68 and 50%. A similar effect is observed with biodegradation: in non-remineralized waters, the reductions are 54, 77 and 69%, andin remineralized waters, 67, 86 and 80%. [ABSTRACT FROM AUTHOR]

It was observed that biodegradable dissolved organic carbon (BDOC), measured by a fixed biomass method, in samples recarbonated with sodium bicarbonate, were always lower than those obtained in similar non-recarbonated samples. Biomass used for all measurement was developed and sustained with non-recarbonated water (base water). The increase of alkalinity, pH and sodium concentration resulting from recarbonation seems to affect BDOC values. Results have shown little variation of BDOC (0.1 to 0.2 mg l-1 C) when the sodium concentrationis raised from 3 mg l-1 (base water; alkalinity = 25 mg l-1 as CaCO3) to 40 mg l-1 (recarbonated water, alkalinity = 100 Mg l-1 as CaCO3). However, when sodium concentration was increased to 109 mg l-1 (recarbonated water, alkalinity = 250 mg l-1 as CaCO3) important underestimation of BDOC (0.4 mg l-1 C to 0.6 mg l-1 C) occurred. In order to obtain better results, it was decided to adapt the biomass to the physico-chemical characteristics of each water for 45 days, 80 days and 120 days. BDOC results obtained with biomass adapted for 80 or 120 days reached those obtained without changing pH or alkalinity. So, for the water used (Mille-Iles river) the minimal adaptation period seems to be between 45and 80 days. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To determine why patients attend dental-care facilities in Ouagadougou, Burkina Faso and to improve understanding of the capacity of oral health-care services in urban west Africa. METHODS: We studied a randomly selected sample of patients attending 15 dental-care facilities in Ouagadougou over a 1-year period in 2004. Data were collected using a simple daily record form. FINDINGS: From a total of 44,975 patients, the final sample was established at 14,591 patients, of whom 55.4% were new patients and 44.6% were 'booking patients'. Most patients seeking care (71.9%) were aged 15-44 years. Nongovernmental not-for-profit dental services were used by 41.5% of all patients, 36% attended private dental-care services, and 22.5% of patients visited public services. The most common complaint causing the patient to seek dental-care services was caries with pulpal involvement (52.4%), and 60% of all complaints were associated with pain. The patients' dental-care requirements were found to differ significantly according to sex, health insurance coverage and occupation. CONCLUSION: Urban district health authorities should ensure provision of primary health-care services, at the patients' first point of contact, which are directed towards the relief of pain. In addition to the strengthening of outreach emergency care, health centres should also contribute to the implementation of community-based programmes for the prevention of oral disease and the promotion of oral health. Exchange of experiences from alternative oral health-care systems relevant to developing countries is urgently needed for tackling the growing burden of oral disease. Copyright © 2005 World Health Organization [ABSTRACT FROM AUTHOR]

Background: Malaria control remains a challenge in many parts of the Sahel and sub-Sahel regions of Africa.Methods: We conducted an individually randomized, controlled trial to assess whether seasonal vaccination with RTS,S/AS01E was noninferior to chemoprevention in preventing uncomplicated malaria and whether the two interventions combined were superior to either one alone in preventing uncomplicated malaria and severe malaria-related outcomes.Results: We randomly assigned 6861 children 5 to 17 months of age to receive sulfadoxine-pyrimethamine and amodiaquine (2287 children [chemoprevention-alone group]), RTS,S/AS01E (2288 children [vaccine-alone group]), or chemoprevention and RTS,S/AS01E (2286 children [combination group]). Of these, 1965, 1988, and 1967 children in the three groups, respectively, received the first dose of the assigned intervention and were followed for 3 years. Febrile seizure developed in 5 children the day after receipt of the vaccine, but the children recovered and had no sequelae. There were 305 events of uncomplicated clinical malaria per 1000 person-years at risk in the chemoprevention-alone group, 278 events per 1000 person-years in the vaccine-alone group, and 113 events per 1000 person-years in the combination group. The hazard ratio for the protective efficacy of RTS,S/AS01E as compared with chemoprevention was 0.92 (95% confidence interval [CI], 0.84 to 1.01), which excluded the prespecified noninferiority margin of 1.20. The protective efficacy of the combination as compared with chemoprevention alone was 62.8% (95% CI, 58.4 to 66.8) against clinical malaria, 70.5% (95% CI, 41.9 to 85.0) against hospital admission with severe malaria according to the World Health Organization definition, and 72.9% (95% CI, 2.9 to 92.4) against death from malaria. The protective efficacy of the combination as compared with the vaccine alone against these outcomes was 59.6% (95% CI, 54.7 to 64.0), 70.6% (95% CI, 42.3 to 85.0), and 75.3% (95% CI, 12.5 to 93.0), respectively.Conclusions: Administration of RTS,S/AS01E was noninferior to chemoprevention in preventing uncomplicated malaria. The combination of these interventions resulted in a substantially lower incidence of uncomplicated malaria, severe malaria, and death from malaria than either intervention alone. (Funded by the Joint Global Health Trials and PATH; ClinicalTrials.gov number, NCT03143218.). [ABSTRACT FROM AUTHOR]

Background: Seasonal vaccination with the RTS,S/AS01 E vaccine combined with seasonal malaria chemoprevention (SMC) prevented malaria in young children more effectively than either intervention given alone over a 3 year period. The objective of this study was to establish whether the added protection provided by the combination could be sustained for a further 2 years., Methods: This was a double-blind, individually randomised, controlled, non-inferiority and superiority, phase 3 trial done at two sites: the Bougouni district and neighbouring areas in Mali and Houndé district, Burkina Faso. Children who had been enrolled in the initial 3-year trial when aged 5-17 months were initially randomly assigned individually to receive SMC with sulphadoxine-pyrimethamine and amodiaquine plus control vaccines, RTS,S/AS01 E plus placebo SMC, or SMC plus RTS,S/AS01 E . They continued to receive the same interventions until the age of 5 years. The primary trial endpoint was the incidence of clinical malaria over the 5-year trial period in both the modified intention-to-treat and per-protocol populations. Over the 5-year period, non-inferiority was defined as a 20% increase in clinical malaria in the RTS,S/AS01 E -alone group compared with the SMC alone group. Superiority was defined as a 12% difference in the incidence of clinical malaria between the combined and single intervention groups. The study is registered with ClinicalTrials.gov, NCT04319380, and is complete., Findings: In April, 2020, of 6861 children originally recruited, 5098 (94%) of the 5433 children who completed the initial 3-year follow-up were re-enrolled in the extension study. Over 5 years, the incidence of clinical malaria per 1000 person-years at risk was 313 in the SMC alone group, 320 in the RTS,S/AS01 E -alone group, and 133 in the combined group. The combination of RTS,S/AS01 E and SMC was superior to SMC (protective efficacy 57·7%, 95% CI 53·3 to 61·7) and to RTS,S/AS01 E (protective efficacy 59·0%, 54·7 to 62·8) in preventing clinical malaria. RTS,S/AS01 E was non-inferior to SMC (hazard ratio 1·03 [95% CI 0·95 to 1·12]). The protective efficacy of the combination versus SMC over the 5-year period of the study was very similar to that seen in the first 3 years with the protective efficacy of the combination versus SMC being 57·7% (53·3 to 61·7) and versus RTS/AS01 E -alone being 59·0% (54·7 to 62·8). The comparable figures for the first 3 years of the study were 62·8% (58·4 to 66·8) and 59·6% (54·7 to 64·0%), respectively. Hospital admissions for WHO-defined severe malaria were reduced by 66·8% (95% CI 40·3 to 81·5), for malarial anaemia by 65·9% (34·1 to 82·4), for blood transfusion by 68·1% (32·6 to 84·9), for all-cause deaths by 44·5% (2·8 to 68·3), for deaths excluding external causes or surgery by 41·1% (-9·2 to 68·3), and for deaths from malaria by 66·8% (-2·7 to 89·3) in the combined group compared with the SMC alone group. No safety signals were detected., Interpretation: Substantial protection against malaria was sustained over 5 years by combining seasonal malaria vaccination with seasonal chemoprevention, offering a potential new approach to malaria control in areas with seasonal malaria transmission., Funding: UK Joint Global Health Trials and PATH's Malaria Vaccine Initiative (through a grant from the Bill & Melinda Gates Foundation)., Translation: For the French translation of the abstract see Supplementary Materials section., Competing Interests: Declaration of interests OO-A is an employee of the GSK group of companies and has restricted shares in the GSK group of companies. All of the authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY 4.0 license. Published by Elsevier Ltd.. All rights reserved.)

Background: A recent trial of 5920 children in Burkina Faso and Mali showed that the combination of seasonal vaccination with the RTS,S/AS01 E malaria vaccine (primary series and two seasonal boosters) and seasonal malaria chemoprevention (four monthly cycles per year) was markedly more effective than either intervention given alone in preventing clinical malaria, severe malaria, and deaths from malaria., Methods: In order to help optimise the timing of these two interventions, trial data were reanalysed to estimate the duration of protection against clinical malaria provided by RTS,S/AS01 E when deployed seasonally, by comparing the group who received the combination of SMC and RTS,S/AS01 E with the group who received SMC alone. The duration of protection from SMC was also estimated comparing the combined intervention group with the group who received RTS,S/AS01 E alone. Three methods were used: Piecewise Cox regression, Flexible parametric survival models and Smoothed Schoenfeld residuals from Cox models, stratifying on the study area and using robust standard errors to control for within-child clustering of multiple episodes., Results: The overall protective efficacy from RTS,S/AS01 E over 6 months was at least 60% following the primary series and the two seasonal booster doses and remained at a high level over the full malaria transmission season. Beyond 6 months, protective efficacy appeared to wane more rapidly, but the uncertainty around the estimates increases due to the lower number of cases during this period (coinciding with the onset of the dry season). Protection from SMC exceeded 90% in the first 2-3 weeks post-administration after several cycles, but was not 100%, even immediately post-administration. Efficacy begins to decline from approximately day 21 and then declines more sharply after day 28, indicating the importance of preserving the delivery interval for SMC cycles at a maximum of four weeks., Conclusions: The efficacy of both interventions was highest immediately post-administration. Understanding differences between these interventions in their peak efficacy and how rapidly efficacy declines over time will help to optimise the scheduling of SMC, malaria vaccination and the combination in areas of seasonal transmission with differing epidemiology, and using different vaccine delivery systems., Trial Registration: The RTS,S-SMC trial in which these data were collected was registered at clinicaltrials.gov: NCT03143218., (© 2022. The Author(s).)

Background: A trial in African children showed that combining seasonal vaccination with the RTS,S/AS01E vaccine with seasonal malaria chemoprevention reduced the incidence of uncomplicated and severe malaria compared with either intervention given alone. Here, we report on the anti-circumsporozoite antibody response to seasonal RTS,S/AS01E vaccination in children in this trial., Methods: Sera from a randomly selected subset of children collected before and 1 month after 3 priming doses of RTS,S/AS01E and before and 1 month after 2 seasonal booster doses were tested for anti-circumsporozoite antibodies using enzyme-linked immunosorbent assay. The association between post-vaccination antibody titer and incidence of malaria was explored., Results: A strong anti-circumsporozoite antibody response to 3 priming doses of RTS,S/AS01E was seen (geometric mean titer, 368.9 enzyme-linked immunosorbent assay units/mL), but titers fell prior to the first booster dose. A strong antibody response to an annual, pre-malaria transmission season booster dose was observed, but this was lower than after the primary vaccination series and lower after the second than after the first booster dose (ratio of geometric mean rise, 0.66; 95% confidence interval [CI], .57-.77). Children whose antibody response was in the upper tercile post-vaccination had a lower incidence of malaria during the following year than children in the lowest tercile (hazard ratio, 0.43; 95% CI, .28-.66)., Conclusions: Seasonal vaccination with RTS,S/AS01E induced a strong booster antibody response that was lower after the second than after the first booster dose. The diminished antibody response to the second booster dose was not associated with diminished efficacy., Clinical Trials Registration: NCT03143218., Competing Interests: Potential conflicts of interest. O. O.-A. is an employee of the GSK group of companies and has restricted shares in the GSK group of companies. A. D. reports a research grant from Grand Challenges Canada to test safety and efficacy of the PfSPZ vaccine for pregnant women and unborn children and a research contract with Oxford University to conduct a phase 3 randomized, controlled multicenter trial to evaluate the efficacy of the R21/Matrix-M vaccine in African children against clinical malaria outside of the submitted work. All other authors report no potential conflicts. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed., (© The Author(s) 2021. Published by Oxford University Press for the Infectious Diseases Society of America.)

Background: A recent trial in Burkina Faso and Mali showed that combining seasonal RTS,S/AS01 E malaria vaccination with seasonal malaria chemoprevention (SMC) substantially reduced the incidence of uncomplicated and severe malaria in young children compared to either intervention alone. Given the possible negative effect of malaria on nutrition, the study investigated whether these children also experienced lower prevalence of acute and chronic malnutrition., Methods: In Burkina Faso and Mali 5920 children were randomized to receive either SMC alone, RTS,S/AS01 E alone, or SMC combined with RTS,S/AS01 E for three malaria transmission seasons (2017-2019). After each transmission season, anthropometric measurements were collected from all study children at a cross-sectional survey and used to derive nutritional status indicators, including the binary variables wasted and stunted (weight-for-height and height-for-age z-scores below - 2, respectively). Binary and continuous outcomes between treatment groups were compared by Poisson and linear regression., Results: In 2017, compared to SMC alone, the combined intervention reduced the prevalence of wasting by approximately 12% [prevalence ratio (PR) = 0.88 (95% CI 0.75, 1.03)], and approximately 21% in 2018 [PR = 0.79 (95% CI 0.62, 1.01)]. Point estimates were similar for comparisons with RTS,S/AS01 E , but there was stronger evidence of a difference. There was at least a 30% reduction in the point estimates for the prevalence of severe wasting in the combined group compared to the other two groups in 2017 and 2018. There was no difference in the prevalence of moderate or severe wasting between the groups in 2019. The prevalence of stunting, low-MUAC-for-age or being underweight did not differ between groups for any of the three years. The prevalence of severe stunting was higher in the combined group compared to both other groups in 2018, and compared to RTS,S/AS01 E alone in 2017; this observation does not have an obvious explanation and may be a chance finding. Overall, malnutrition was very common in this cohort, but declined over the study as the children became older., Conclusions: Despite a high burden of malnutrition and malaria in the study populations, and a major reduction in the incidence of malaria in children receiving both interventions, this had only a modest impact on nutritional status. Therefore, other interventions are needed to reduce the high burden of malnutrition in these areas., Trial Registration: https://www.clinicaltrials.gov/ct2/show/NCT03143218 , registered 8th May 2017., (© 2022. The Author(s).)

This study aimed to determine the prevalence and risk factors of HIV infection among people with disabilities (PWDs) in Burkina Faso. We carried out a cross-sectional study on level 3 and/or 4 disabled people. Identification of PWDs aged 15-69 years was done in households using the Washington Group (WG) Short questionnaire, following by HIV behavioural survey and HIV testing. Multi-level binary logistics Bayesian analysis was done to identify factor associated with HIV. In total, 973 PWDs were included in this study. HIV prevalence was 4.6% (3.3-6.1%). Independent factors associated with HIV infection were aged 35-44 years old (AOR: 8.93; 95% CrI: 3.57-18.89), had visual or hearing impairments (AOR: 6.38; 95%CrI: 1.95-15.44), no income (AOR:6.11; 95% CrI: 2.49-12.48), and had casual sex partners (AOR: 6.28; 95% CrI: 3.27-11.13). HIV prevalence is high compared to the general population. These data suggest a need for comprehensive and specific HIV prevention among people with disabilities, including awareness for safer sexual behaviours.

Many studies have shown the HIV vulnerability of people with disabilities (PWD). This vulnerability is supported by risky sexual behaviours, which need to be well described. The objective of this study is to identify predictors of sexual behaviours at risk of HIV infection among PWD in Burkina Faso. We conducted a population-based cross-sectional study on disability and HIV in four regions in Burkina Faso. PWD were selected through a probabilistic method. The Washington Group Short questionnaire was used to identify PWD. Five sexual risk behaviours were considered in this analysis (having multiple sex partners, starting sex at an early age, having had sex with a nonregular partner, sex in return for payment and condomless sex). A composite variable was created and called "risky sexual behaviour (RSB)", which was defined in three categories (low risk, moderate risk and high risk) based on the co-occurrence of the individual sexual risk behaviours. Generalized structural equation was used to identify the predictors of RSB withincome possession as a mediator. A total of 973 PWD were included in this study. The proportion of PWD who were engaged in at least two risky sexual behaviours was 9.5% (95%CI: 6.5-13.8), those with one risky sexual behaviour represented 42.8% (95%CI: 39.4-46.3) and less than half ( 47.7% (95%CI: 43.3-52.1)) werenot engaged in risky sexual behaviour. The prevalence of HIV increased with the level of risky sexual behaviour. Age, education level and type of disability have a significant direct effect on RSB. Indeed, the oddof engaging in sexual risk behaviour was low among PWD who attended at least secondary school compared to those who were not schooled (adjusted odds ratio (aOR): 0.62 (95%CI: 0.41-0.92). The indirect effect of sex on RSB mediating by income possession was significant. Indeed, women with income have a low oddof engaging in RSB compared to men (aOR: 0.83 [95%CI: 0.71-0.98]). Our results confirm a certain ambivalence in the sexuality of people with disabilities. Hence, there is a need for a particular focus on risky sexual behaviour to enable the development of an effective HIV strategy in this group.

Introduction: Despite the implementation of various nutritional interventions, access to healthy food in sufficient quantity for the population remain challenging in Burkina Faso. The objective of this study was to assess the nutritional status of infants aged 6-23 months and to identify factors associated with malnutrition., Patients and Methods: From 1 st May to 31th July 2016, we conducted a cross-sectional study at Yalgado Ouedraogo University Hospital paediatric department. Infants aged 6 to 23 months admitted to the paediatric emergency department were enrolled. Factors associated with malnutrition were identified using multivariate logistic regression., Results: A total of 295 infants were included, at an average age of 13 months (standard deviation: 5.1 months). The prevalence of wasting was 15%, 13% was stuntingand 7% was underweight. The majority of mothers (69%) were unaware of exclusive breastfeeding and only 22% knew the importance of colostrum. In multivariate analysis age ≥ 12 months increased the odds of wasting (adjusted odds ratio [aOR]: 2.3, 95% confidence interval: 1.1-4.7), while knowledge of exclusive breastfeeding reduced the risk of wasting (aOR: 0.4, 95% CI 0.2-0.9). In addition, age ≥12 months (aOR: 0.08, 95% CI: 0.03-0.22), female gender (aOR: 0.31, 95% CI: 0.12-0.77) and absence of dietary restrictions (aOR: 0.13, 95% CI: 0.05-0.3) significantly reduced the odds of stunting., Conclusion: The prevalence of malnutrition remains high in paediatric department in Burkina Faso. Routine screening and adequate management of malnutrition, coupled with the promotion of optimal nutritional practices in childhood, is needed to improve child healthcare., (Le comité de rédaction se réserve le droit de renvoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de conserver un exemplaire du manuscrit, des figures et des tableaux.)

CA, 14 old years, female, born last uterine siblings of 9 children, 4 died of various causes, was admitted in the pediatric service of CHU-YO for functional impairment of the lower limbs. Physical examination revealed swelling and deformation harsh, uneven surfaces, the circumferential upper and lower limbs and lumbar spine associated with spastic paraplegia. Sphincter disturbances accompany this clinical picture. The radiographic bone marrow hypertrophy individually with images of exostosis at the epiphyses. Multiple exostosis or BESSEF Hogen's disease is rare and has a reserve functional prognosis because of outcome of low spinal cord compression and vascular compression. We felt it appropriate to bring this case discovered during our clinical practice because of its rarity and the risk of malignant degeneration., (Le comitée de rédaction se réserve le droit de revoyer aux auteurs avant toute soumission à l'avis des lecteurs les manuscrits qui ne seraient pas conformes à ces modalités de présentation. En outre il leur conseille de sonserver un examplaire du manuscrit, des figures et des tableaux.)

In tackling agricultural challenges, policy-makers in sub-Saharan Africa (SSA) have increasingly considered genetically modified (GM) crops as a potential tool to increase productivity and to improve product quality. Yet, as elsewhere in the world, the adoption of GM crops in SSA has been marked by controversy, encompassing not only the potential risks to animal and human health, and to the environment, but also other concerns such as ethical issues, public participation in decision-making, socio-economic factors and intellectual property rights. With these non-scientific factors complicating an already controversial situation, disseminating credible information to the public as well as facilitating stakeholder input into decision-making is essential. In SSA, there are various and innovative risk communication approaches and strategies being developed, yet a comprehensive analysis of such data is missing. This gap is addressed by giving an overview of current strategies, identifying similarities and differences between various country and institutional approaches and promoting a way forward, building on a recent workshop with risk communicators working in SSA.