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Objective To compare oxygen supply options for health facilities in the Gambia and develop a decision-making algorithm for choosing oxygen delivery systems in Africa and the rest of the developing world. Methods Oxygen cylinders and concentrators were compared in terms of functionality and cost. Interviews with key informants using locally developed and adapted WHO instruments, operational assessments, cost-modelling and cost measurements were undertaken to determine whether oxygen cylinders or concentrators were the better choice. An algorithm and a software tool to guide the choice of oxygen delivery system were constructed. Findings In the Gambia, oxygen concentrators have significant advantages compared to cylinders where power is reliable; in other settings, cylinders are preferable as long as transporting them is feasible. Cylinder costs are greatly influenced by leakage, which is common, whereas concentrator costs are affected by the cost of power far more than by capital costs. Only two of 12 facilities in the Gambia were found suitable for concentrators; at the remaining 10 facilities, cylinders were the better option. Conclusion Neither concentrators nor cylinders are well suited to every situation, but a simple options assessment can determine which is better in each setting. Nationally this would result in improved supply and lower costs by comparison with conventional cylinders alone, although ensuring a reliable supply would remain a challenge. The decision algorithm and software tool designed for the Gambia could be applied in other developing countries. Objectif Comparer les options d'approvisionnement en oxygene qui s'offrent aux etablissements de soins de Gambie et developper un algorithme de prise de decisions pour guider le choix des systemes d'approvisionnement en oxygene en Afrique et dans le reste du monde en developpement. Methodes Les auteurs ont compare en termes de fonctionnalite et de cout les bouteilles et les concentrateurs d'oxygene. Ils ont interroge des informateurs cles en utilisant des instruments d'evaluation OMS mis au point et adaptes localement et realise des evaluations operationnelles, ainsi qu'une modelisation et des mesures des couts pour determiner le meilleur choix entre les bouteilles et les concentrateurs d'oxygene, lis ont elabore un algorithme et un outil logiciel pour guider la selection du systeme d'approvisionnement en oxygene. Resultats En Gambie, les concentrateurs d'oxygene presentent des avantages notables par rapport aux bouteilles lorsque I'alimentation electrique est fiable ; dans d'autres contextes, il est preferable de faire appel aux bouteilles dans la mesure ou leur transport est praticable. La presence de fuites, phenomene courant, influe fortement sur le cout des bouteilles, tandis que pour les concentrateurs, les couts energetiques sont de loin plus importants que les couts en capital. Sur les 12 etablissements gambiens, 2 seulement avaient interet d'apres l'etude a utiliser des concentrateurs ; pour les 10 autres, les bouteilles constituaient une meilleure option. Conclusion Ni les concentrateurs, ni les bouteilles ne conviennent a toutes les situations, mais une evaluation simple des options permet de determiner pour chaque contexte la meilleure solution. A l'echelle nationale, cette evaluation devrait conduire a une amelioration de I'approvisionnement et a une baisse des couts par rapport a la situation ou I'on utilise uniquement des bouteilles d'oxygene classiques, mais assurer un approvisionnement fiable devrait rester un defi. L'algorithme decisionnel et l'outil logiciel concus pour la Gambie devraient etre applicables dans d'autres pays en developpement. Objetivo Comparar las opciones de suministro de oxigeno para centros de salud en Gambia y desarrollar un algoritmo decisional para elegir los sistemas de suministro de oxigeno en Africa y en el resto del mundo en desarrollo. Metodos Se compararon la funcionalidad y el costo de las bombonas y los concentradores de oxigeno. Se Ilevaron a cabo entrevistas con informantes clave mediante instrumentos desarrollados localmente o adaptados a partir de otros de la OMS, evaluaciones operacionales, modelizaciones de costos y mediciones de costos a fin de determinar la mejor opcion entre las bombonas y los concentradores de oxigeno. Se desarrollo asi un algoritmo y un instrumento de software para fundamentar la eleccion dei sistema de suministro de oxigeno. Resultados En Gambia, los concentradores de oxigeno presentan ventajas importantes en comparacion con las bombonas alli donde el suministro electrico es fiable; en caso contrario, la opcion preferible son las bombonas, siempre y cuando sea factible transportarlas. El costo de las bombonas depende considerablemente de las fugas, un problema frecuente, mientras que el de los concentradores depende mucho mas del costo de la electricidad que de los gastos de infraestructura. Solo dos de los 12 centros de Gambia analizados reunian las condiciones idoneas para usar concentradores; en los otros diez centros, la mejor opcion eran las bombonas. Conclusion Ni los concentradores ni las bombonas son soluciones ideales para cualquier situacion, pero una simple evaluacion de esas dos opciones permite determinar cual es preferible en cada entorno. A nivel nacional, esa diferenciacion se traduciria en mejoras del suministro y menores costos en comparacion con el uso exclusivo de las bombonas convencionales, pero seguiria habiendo problemas para garantizar un suministro fiable. El algoritmo decisional y el instrumento de software concebidos para Gambia podrian aplicarse en otros paises en desarrollo., Introduction Acute respiratory infection, principally pneumonia, remains the leading cause of death in young children worldwide. (1-3) Case management of pneumonia is a key component of the WHO Integrated Management [...]

Abstract Background Helicobacter pylori is an important agent of gastroduodenal disease in Africa and throughout the world. We sought to determine an optimum method for genotyping H. pylori strains from children and adults in The Gambia, West Africa. Results Virulence genes were amplified in 127 of 190 cases tested (121 adults and 6 children); each of 60 bacterial cultures, and 116 from DNA extracted directly from biopsies. The proportion of biopsies that were cagA+, the ratio of vacAs1/s2, and vacAm1/m2, and the proportion of mixed strain populations in individual subjects changed with age. Strains lacking virulence cagA and vacA genes and with apparently homogeneous (one predominant strain) infections were more common among infants than adults. Conclusions In order to detect the range of bacterial genotypes harbored by individual patients, direct PCR proved slightly superior to isolation of H. pylori by biopsy culture, but the techniques were complementary, and the combination of both culture and direct PCR produced the most complete picture. The seemingly higher virulence of strains from adult than infant infections in The Gambia merits further analysis.

Abstract Background Few studies on bacteraemia in Africa have been published. We aimed to prospectively identify the causative organisms of bacteraemia in The Gambia and their relation to clinical diagnoses, outcome and antimicrobial susceptibility. Methods Between November 2003 and February 2005 we studied those admitted to the Medical Research Council hospital who were suspected of having bacteraemia. We documented clinical features, outcome, pathogens identified and their susceptibility patterns, and searched for factors associated with bacteraemia. Results 871 patients were admitted and had a blood culture taken. The median age was 2 years (range 2 months to 80 years) and 36 of 119 tested were HIV positive; 54.5% were male. 297 (34%) had a positive result and 93 (10.7% overall) were considered a genuine pathogen. Those with bacteraemia were more likely to die in hospital (OR 2.79; 1.17–6.65, p = 0.017) and to have a high white cell count (WCC; OR 1.81;95% CI 1.09–3.02; p = 0.022). Three organisms accounted for 73% of bacteraemias: Streptococcus pneumoniae (45.2%), Staphylococcus aureus (18.3%) and Escherichia coli (9.7%) while non-typhoidal salmonellae (NTS) accounted for 8.6%. Antimicrobial susceptibility of S. pneumoniae was very high to penicillin (97.5%); high resistance was found to co-trimoxazole. S. aureus was generally highly susceptible to cloxacillin, gentamicin and chloramphenicol. E. coli and NTS were all susceptible to ciprofloxacin and mostly susceptible to gentamicin. Thirteen (33%) S. pneumoniae isolates were of serotypes contained in a 7-valent pneumococcal conjugate vaccine and 20 (51.3%) were of the same serogroup. Conclusion In The Gambia, those with bacteraemia are more likely than those without to die in hospital and to have a raised peripheral blood WCC. S. pneumoniae is the most common organism isolated. Introduction of a pneumococcal conjugate vaccine can be expected to lead to a reduction in disease incidence.