Detection of kdr and ace-1 mutations in wild populations of Anopheles arabiensis and An. melas in a residual malaria transmission area of Senegal.

In the central western Senegal, malaria transmission has been reduced low due to the combination of several effective control interventions. However, despite this encouraging achievement, residual malaria transmission still occurring in few areas, mainly ensured by An. arabiensis and An. melas. The resurgence or the persistence of the disease may have originated from the increase and the spread of insecticide resistance genes among natural malaria vectors populations. Therefore, assessing the status and mechanisms of insecticides resistance among targeted malaria vectors is of highest importance to better characterize factors underlying the residual transmission where it occurs. Malaria vectors were collected from three selected villages using nocturnal human landing catches (HLC) and pyrethrum spray collections (PSC) methods. An. gambiae s.l. specimens were identified at the species level then genotyped for the presence of kdr-west (L1014F), kdr-east (L1014S) and ace-1R mutations by qPCR. An. arabiensis (69.36%) and An. melas (27.99%) were the most common species of the Gambiae complex in the study area. Among An. arabiensis population, the allelic frequency of the kdr-east (22.66%) was relatively higher than for kdr-west mutation (9.96%). While for An. melas populations, the overall frequencies of both mutations were very low, being respectively 1.12% and 0.40% for the L1014S and L1014F mutations. With a global frequency of 2%, only the heterozygous form of the G119S mutation was found only in An. arabiensis and in all the study sites. The widespread occurrence of the kdr mutation in both An. arabiensis and An. melas natural populations, respectively the main and focal vectors in the central-western Senegal, may have contributed to maintaining malaria transmission in the area. Thus, compromising the effectiveness of pyrethroids-based vector control measures and the National Elimination Goal. Therefore, monitoring and managing properly insecticide resistance became a key programmatic intervention to achieve the elimination goal where feasible, as aimed by Senegal. Noteworthy, this is the first report of the ace-1 mutation in natural populations of An. arabiensis from Senegal, which need to be closely monitored to preserve one of the essential insecticide classes used in IRS to control the pyrethroids-resistant populations.

Epidemiology of scalp ringworms and superficial fungal infections in schools in Mauritania.

INTRODUCTION: Scalp Tinea is the most common mycosis in children and adolescents. The objective of this work was to determine the epidemiological and etiological profile of Scalp Tinea in schoolchildren in Mauritania, during the year 2019. METHODS: This is a descriptive cross-sectional study lasting four months, from May to September 2019, in a sample of schoolchildren from Nouakchott, included following a random survey at three levels, having benefited from a clinical examination, mycological and culture samples. RESULTS: A total of 228 children out of the 434 included (52,5%) were detected as carriers of Scalp Tinea, after fungal culture, i.e. rates of 54% in boys and 46% in girls. The most affected age group was 9-12 years (49%). Public schools were the most affected (37,7%), followed by private schools (32%) and traditional schools (30,3%), (p<0,05). Trichophyton sudanense represented 23,5% (n=102) followed by Trichophyton rubrum (15,4%, n=67) and Microsporum langeronii 8,1% (n=35). The type of habitat, the humidity of the environment and walking with bare feet did not significantly influence the presence of ringworms, unlike overcrowding (sleeping with more than two people). The prevalence of scalp ringworms increased from 1,3% for children sleeping on single beds to 22,8% in children sharing their beds and to 75,9% in students sleeping together on the same bed (p˂0,05). CONCLUSION: The results of this survey, conducted in 2019, confirmed the changes in the epidemiological and ecological trend of the mycological profile of Scalp Tinea, in Mauritania. It is necessary to strengthen these results with the molecular characterization of fungal strains circulating in our country.

Tinea capitis in school children from Mauritania: A comparative study between urban and rural areas.

INTRODUCTION: In Mauritania, only an investigation carried out 26 years ago allows to report epidemiological findings about tinea capitis in Nouakchott. The objective of this study was to reactualize the tinea capitis epidemiological, clinical and mycological profile in school children and to compare this profile in urban and rural area. PATIENTS AND METHODS: All subscribed students in targeted schools and present during the investigation were examined clinically before samples collection. Mycological diagnosis was made by direct examination and culture in Sabouraud Dextrose Agar with chloramphenicol and supplemented with cycloheximide. The results were considered positive when culture with the presence of dermatophytes was obtained. RESULTS: Prevalence of tinea capitis among school children was 10.50% and it was more important in rural area (12.21%) than in urban area (9.52%). The age group ranged between 6 and 8 years was the most affected (13.58%). According to the gender, male (11.46%) were more affected than female (9.62%). Trichophytic tinea were predominant and Trichophyton soudanense was more isolated followed by Trichophyton rubrum, Trichophyton schoenleinii and Microsporum audouinii.

[Determinants of acute malnutrition among children aged 6-59 months in Menaka health district]. / Facteurs determinants de la malnutrition aigue chez les enfants de 6-59 mois dans le district sanitaire de Menaka.

BACKGROUND: Acute malnutrition continues to be a real public health problem due to morbidity and mortality. The aim of this study was to determine the risk factors related to acute malnutrition among children aged 6-59 months in the health district of Menaka. METHODS: This is a case-control study that was conducted in the health district of Menaka over a period of six (6) months from January to June 2019. Data collection was done for patients in recovery and nutrition education units and for controls, in health centers and in the general population. Subjects were matched on age and sex. Data analysis was done using SPSS software version 20.0. RESULTS: Children with no immunization or incorrect immunization (OR = 18.17 [3.49-94.56]), children not fed exclusively with breast milk before 6 months (OR = 16.44 [3 , 93-68.8]) and lack of compliance with the principle of spacing births (OR = 9.93 [1.65-59.8]) were strongly implicated in the occurrence of acute malnutrition. CONCLUSION: Efforts should be made by the authorities to improve population's living conditions, which would improve the nutritional status of children under five and also reduce acute malnutrition prevalence.

INTRODUCTION: La malnutrition aigue continue d'être un véritable problème de santé publique de par la morbidité et la mortalité. L'objectif de cette étude était de déterminer les facteurs de risques liés à la malnutrition aigue chez les enfants de 6-59 mois dans le district sanitaire de Ménaka. MATÉRIEL ET MÉTHODES: Il s'agissait d'une étude cas-témoins qui a été réalisée dans le district sanitaire de Ménaka sur une période de six(6) mois allant de Janvier à Juin 2019. Le recueil des données a été fait pour les malades dans les unités de récupération et d'éducation nutritionnelle et pour les témoins dans les centres de santé et dans la population générale. Les sujets ont été appariés sur l'âge et le sexe. L'analyse des données a été faite à l'aide du logiciel SPSS version 20.0. RÉSULTATS: La non vaccination ou la vaccination incorrecte des enfants (OR=18,17[3,49-94,56]), le non allaitement des enfants exclusivement au lait maternel avant l'âge de 6 mois (OR=16,44 [3,93-68,8]) et le non respect du principe de l'espacement des naissances (OR=9,93 [1,65-59,8]) étaient fortement impliqués dans la survenue de la malnutrition aigue. CONCLUSION: Des efforts devraient être entrepris par les autorités pour améliorer le cadre de vie des populations, ce qui permettrait d'améliorer l'état nutritionnel des enfants de moins de cinq ans et aussi réduire la prévalence de la malnutrition aigue.

[Vulvovaginal candidiasis in pregnant women in the Mère et Enfant Hospital center in Nouakchott, Mauritania]. / Candidoses vulvo-vaginales chez les femmes enceintes au centre hospitalier Mère et Enfant de Nouakchott (Mauritanie).

AIM: To determine the prevalence and the associated risk factors of vulvovaginal candidiasis in pregnant women in Mauritania. PATIENTS AND METHOD: The study was carried out at the laboratory of the Mère et Enfant Center in Nouakchott, from November 1, 2016 to February 5, 2017. It concerned all pregnant women in the third trimester that came to the natal consultation at the gynecology service. These women must have given their informed consent in written form. After completing the survey to collect epidemiological and clinical data, a sample was collected to perform fresh direct examination and culture on Sabouraud-Chloramphenicol media. RESULTS: Two hundred pregnant women were included in the study. Culture on Sabouraud-Chloramphenicol media was positive in 52 patients corresponding to a prevalence of 26%. The germ tube test was positive for 61.5% of isolated Candida. Clinical signs are dominated by leucorrhea (56%), pelvic pain (25%) and vulvar pruritus (11%). Among women with positive culture, 55.76% had received local antifungal treatment in the form of an ovula during pregnancy. CONCLUSION: This study shows that vulvovaginal candidiasis is frequent in pregnant women attending gynecology at the Mère et Enfant Hospital Center in Nouakchott.

[A continuous series of 27 adult patients treated for L5-S1 isthmic spondylolisthesis by combined approach: Clinical and radiological outcomes at 1 year follow-up]. / Une série continue de 27 patients adultes opérés d'un spondylolisthésis isthmique L5-S1 par voie combinée : résultats cliniques et radiologiques à 1 an de suivi.

Through this single-center consecutive prospective study, we evaluated the results of a combined approach for L5-S1 isthmic spondylolisthesis, using a polyetheretherketone (PEEK) interbody lordotic cage during anterior approach and pedicle screw-based posterior fixation. Between 2010 and 2014, 27 adult patients were treated for L5-S1 isthmic spondylolisthesis (high and low grades) by a combined approach with a minimum follow-up of one year. Clinical outcome was assessed before surgical treatment and at four months and one year after surgery by: VAS, Oswestry Index (ODI) and Rolland-Morris scores. Two observers evaluated the following radiological parameters: pelvic incidence, pelvic tilt, lumbar lordosis, segmental lordosis L5-S1, anterior and posterior disc height, spinal vertical axis (SVA), SVA/sacro-femoral distance (SFD) ratio. Fusion was evaluated on the CT scan at one-year follow-up. Blood loss, surgery time and complications were also collected. The mean age was 47.7 years (±16.9). The VAS, ODI and Rolland-Morris scores were significantly improved postoperatively, decreased from 7.5 (±1.45); 48 (±19.25); 15.3 (±4.67) before the surgery to 3.8 (±2.55); 28.7 (±19.58) and 7.76 (±7.21) respectively at one year after the surgery (P=0.05). The mean follow-up was 3.3 years. Mean surgery time was 193.7min (±37). Fusion was obtained in 100% of cases. Segmental lordosis L5-S1, pelvic tilt, slippage, anterior and posterior L5-S1 disc height were significantly improved postoperatively, they passed from 20.1; 22.6; 35.3%; 26.4%; 17.9% to 29.5; 20.6; 20.3%; 64.4%; 36.3% respectively. Combined surgical procedure meets the required goals of surgery in the treatment of adults L5-S1 isthmic spondylolisthesis.

[Effectiveness of three biological larvicides and of an insect growth regulator against Anopheles arabiensis in Senegal]. / Efficacité de trois larvicides d'origine biologique et d'un régulateur de croissance contre Anopheles arabiensis au Sénégal.

Urban malaria is a major public health problem in Africa. In Senegal, the environmental changes seem to favor the persistence of malaria transmission in Dakar suburbs by creating, throughout the year, potential breeding sites of malaria vectors. In such a situation and in a context of a growing threat of insecticide resistance in anopheline vectors, the larval control making use of products from biological origin or growth regulators could represent an additional tool to the current strategies developed against anophelines. In this study conducted in 2012, the efficiency and residual effect of three biological larvicides (VectoBac® WG, Vecto-Max® CG, and VectoBac® GR) and an insect growth regulator (MetaLarv™) were evaluated on Anopheles gambiae s.l. larvae in seminatural conditions (experimental station) and natural breeding sites in the suburbs of Dakar. The formulations were tested according to the manufacturer recommendations, namely 0.03 g/m2 for VectoBac® WG, 0.5 g/m2 for VectoBac® GR, 0.75 g/m2 for VectoMax® CG, and 0.5 g/m2 for MetaLarv™. In experimental station, the treatment with larvicides was effective over a period of 14 days with a mortality ranging between 92% and 100%. The insect growth regulator remained effective up to 55 days with a single emergence recorded in the 27th day after treatment. In natural conditions, a total effectiveness (100% mortality) of larvicides was obtained 48 hours after treatment, then a gradual recolonization of breeding sites was noted. However, the insect growth regulator has reduced adult emergence higher than 80% until the end of follow-up (J28). This study showed a good efficiency of the larvicides and of the growth regulator tested. These works provide current data on potential candidates for the implementation of larval control interventions in addition to that of chemical adulticide for control of urban malaria.

[Identification of anopheles breeding sites in the residual foci of low malaria transmission «hotspots¼ in Central and Western Senegal]. / Identification des gîtes larvaires d'anophèles dans les foyers résiduels de faible transmission du paludisme « hotspots ¼ au centre-ouest du Sénégal.

Malaria incidence has markedly declined in the Mbour, Fatick, Niakhar and Bambey districts (central and western Senegal) thanks to a scaling up of effective control measures namely LLINs (Long Lasting Insecticide Treated Net), ACTs (Artesunate Combination Therapy) and promoting care seeking. However malaria cases are now maintained by foci of transmission called hotspots. We evaluate the role of anopheles breeding sites in the identification of malaria hotspots in the health districts of Mbour, Fatick, Niakhar and Bambey. Surveys of breeding sites were made in 6 hotspot villages and 4 non-hotspot villages. A sample was taken in each water point with mosquito larvae by dipping method and the collected specimens were identified to the genus level. Additional parameters as name of the village and breeding sites, type of collection, original water turbidity, presence of vegetation, proximity to dwellings, geographic coordinates, sizes were also collected. Sixty-two water collections were surveyed and monitored between 2013 and 2014. Temporary natural breeding sites were predominant regardless of the epidemiological status of the village. Among the 31 breeding sites located within 500 meters of dwellings in hotspots villages, 70% carried Anopheles larvae during the rainy season while 43% of the 21 breeding sites located at similar distances in non-hotspot villages carried Anopheles larvae during the same period (P = 0.042). At the end of the rainy season, the trend is the same with 27% of positive breeding sites in hotspots and 14% in non-hotspots villages. The breeding sites encountered in hotspots villages are mostly small to medium size and are more productive by Anopheles larvae than those found in non-hotspot area. This study showed that the high frequency of smallest and productive breeding sites around and inside the villages can create conditions of residual transmission.

[Descriptive study of traffic injuries in the health district of Diema]. / Accidents de la circulation routiere dans le district sanitaire de Diema.

BACKGROUND: Road traffic accidents are major causes of mortality and morbidity. Therefore, we proposed to do a descriptive study of these accidents in the Diéma Referral Health Center during our study period. MATERIAL AND METHODS: This is a descriptive cross-sectional study, which took place in the health district of Diema (Kayes region) from February to July, 2010. It concerned patients victim of road traffic accidents and admitted to the Diema referral health center. Patient information was collected from medical records using a customized questionnaire. Data analysis was done using the SPSS 12.0 software. Quantitative variables were expressed as mean and standard deviation and categorical variables by proportions. RESULTS: A total of 143 patients were admitted. The prevalence of accidents was 8.66%. The mean age of patients was 31.5 ± 12.2 years. The male sex was the most affected 72%. Automobiles were most involved 67.1%. The frequency of these accidents was higher in March at 30.1%. The injuries were the most common lesions with 86.1% of cases and the head was the most affected with 48.3%. Half of these accidents occurred between 8 o'clock and 12 o'clock. We observed 4.9% of deaths. CONCLUSION: Traffic accidents remain true public health problems today because of the serious consequences they generate. To reduce this problem, it is necessary to have well adapted roads and ensure a rigorous application of the rules of the road.

INTRODUCTION: Les accidents de la circulation routière constituent des causes importantes de mortalité et de morbidité. De ce fait, nous nous sommes proposé de faire une étude descriptive de ces accidents au Centre de santé de référence de Diéma durant notre période d'étude. MATÉRIELS ET MÉTHODES: Il s'agit d'une étude transversale descriptive qui s'est déroulée dans le district sanitaire de Diéma (région de Kayes) durant la période de Février à Juillet 2010. Elle a concerné les patients victimes d'accidents de la circulation routière et reçus au centre de santé de référence de Diéma. Les informations sur les patients ont été recueillies à partir des dossiers médicaux à l'aide d'un questionnaire établi à cet effet. L'analyse des données essentiellement descriptive a été faite à l'aide du logiciel SPSS version 12.0. Les variables quantitatives ont été exprimées par la moyenne et l'écart type et les variables qualitatives par les proportions. RÉSULTATS: Au total, 143 patients ont été enregistrés. La prévalence des accidents était de 8,66%. L'âge moyen des patients était de 31,5 ± 12,2 ans. Le sexe masculin a été le plus atteint 72%. Les automobiles seules ont été les plus en cause 67,13% .La fréquence de ces accidents était plus élevée au mois de Mars avec 30,1% .Les blessures ont été les lésions les plus retrouvées avec 86,12% et la tête a été la plus touchée avec 48,32% .La moitié de ces accidents s'est produite entre 8heures et 12 heures .On a observé 4,9% de décès. CONCLUSION: Les accidents de la circulation demeurent de véritables problèmes de santé publique de nos jours du fait des graves conséquences qu'ils engendrent. Pour diminuer ce fléau, il est donc nécessaire d'avoir des routes bien adaptées et veiller à une application rigoureuse du code de la route.

[Acceptability of indoor residual spraying in the Central-Western of Senegal]. / Étude de l'acceptabilité de l'aspersion intradomiciliaire d'insecticide à effet rémanent dans le centre-ouest du Sénégal.

The recent decline of malaria transmission in central-western of Senegal after a scaling up of control measures gives an open window for interventions toward malaria elimination. As a consequence, malaria transmission is now occurring as hotspots. The aim of the project is to evaluate whether target control measures combining indoor residual spraying (IRS) with chemoprophylaxis can virtually eliminate malaria in hotspots. Targeted villages located in four (4) health districts (Mbour, Fatick, Niakhar and Bambey) were sprayed in august 2013 with Actellic® 300 CS (Pirimiphosmethyl). Our objective in this study is to evaluate the acceptability of IRS in the population. IRS is a very complex intervention that requires strong adhesion of populations. After its implementation, 370 households have been interviewed. The results of this survey showed good acceptability of IRS using Actellic® 300 CS, with 97.8% of beneficiaries who declared that IRS is good and even excellent for the community. Despite inconveniences that may arise during intervention, including the preparation of structures to be treated, 98% of respondents were not disturbed in their daily activities. 98.6% of responders declared that sprayers were working with professionalism and almost all households (99.7%) are willing to accept IRS next year. The survey revealed a good acceptability of indoor residual spraying in hot spots located in central-western of Senegal; spraying with Actellic® 300 CS did not cause a problem to the targeted populations. Finally, there is great satisfaction in the population due a huge reduction of mosquito nuisances.

[Qualitative fungal composition of services at risk of nosocomial infections at Aristide Le Dantec Hospital (Dakar)]. / Composition qualitative de la flore fongique de l'environnement de 07 services à risque d'infections fongiques au CHU Aristide Le Dantec (Dakar).

INTRODUCTION: In hospitals, the quality control of the air is a key element. Indeed airborne fungi constitute a real danger for patients hospitalized in wards at risk of nosocomial infections especially when they are immunocompromised. OBJECTIVES: The objective was to determine the qualitative fungal flora composition of wards at risk of nosocomial infections at Le Dantec teaching hospital. MATERIALS AND METHODS: Between April and May 2013, 73 samples were collected from 45 compartments within seven services at risk of nosocomial infection at Aristide Le Dantec teaching Hospital (Dakar). Samples were made once by sedimentation method and the percentage of positive cultures was 100%. The most represented species were Cladosporium spp. (91.1%), Aspergillus spp. (86.6%), Penicillium spp. 71.1% and Candida spp. (57.7%). Candida albicans and Aspergillus fumigatus were isolated respectively at 15.5% and 11.1%. Wards have been classified according to the number of species isolated; 11 species in pediatric oncology, 10 species in pediatric surgery/neonatal and intensive care, nine species for oncology, eight species in general surgery and dermatology, and four species in internal medicine. CONCLUSION: This study shows that fungi causing nosocomial infections are present in hospital and their monitoring should be included in the program of Nosocomial Infections Prevention Committees (CLIN).

Recombinant inbred line differential identifies race-specific resistance to phytophthora root rot in Capsicum annuum.

A differential series is the normal method for identification of races within a plant pathogen and a host interaction. A host differential is extremely useful for phytopathological as well as breeding purposes. A set of recombinant inbred lines (RILs) were developed and characterized for race differentiation of Phytophthora root rot caused by Phytophthora capsici. The highly resistant Capsicum annuum accession Criollo de Morelos-334 was hybridized to a susceptible cultivar, Early Jalapeno, to generate the RIL population. The host differential characterized 17 isolates of P. capsici into 13 races. The establishment of a stable host differential for the P. capsici and C. annuum interaction will assist researchers in understanding the complex inheritance of resistance to Phytophthora root rot and to develop resistant cultivars.

[Morbidity and mortality in the pediatric service at Gabriel Toure's University Hospital in Mali]. / Morbidite et Mortalite dans le Service de Pediatrie du Chu Gabriel Toure au Mali.

The aim of this work was to study morbidity and mortality before implementing the setting up of the pediatric service of Bamako. Involved in the study were all the children hospitalized during 12 months that is a total of 2000 cases among which 57.3% boys and 42.8% girls. Our study indicated that only 25% of children (509/2000) were referred. The most encountered pathologies were : malaria 898 (44.9%), ARI 528 (26.4%), diarrhea 224 (11.2%), malnutrition 269 (13.4%) and anemia 239 (11.9%). Mortality rate in hospital was 7.1 % and the main causes of deaths were : malaria (23.9% of death cases), diarrhea (20.4%) and malnutrition (31.7%). Thus we have recorded 8.3% of deaths for a period of resort beyond 3 days, compare to 3.3 % for a resort of less than 24 hours. (x² = 8.10, p= 0.017 ). The pediatric service operated as a center for first contact. In the framework of the establishment of this project, organizational efforts should allow to receive only referred cases.

[Burkholderia cepacia isolation and characterization from hospital infections]. / Isolement et caractérisation de Burkholderia cepacia à l'origine d'infections hospitalières.

The evolution of reanimation and functional exploration techniques has led to and explosion of nosocomial infections. They are prevailing in Intensive Care and Neonatal Units. This study deals with B. cepacia strains isolated in 1996 in a pediatric hospital of the Dakar University Hospital Center, following the installation of tracheo-bronchial exhausters which are used for obstruction removal among children. The 44 B. cepacia strains examined come from 42 blood cultures done among 29 boys and 13 girls aged between 5 days and 7 years, and from 2 exhausters. After identification by API20 NE (bio Merieux), a standard antibiogram, a 3 characters biotyping (O.N.P.G., esculin, nitrate reductase) and a study of the polymorphism of the DNA enzymatic restriction profile obtained by an pulsed field electrophoresis are performed on the isolates. The contamination come from the exhausters. All the strains produce an orange-colored yellow pigment. Only an O.N.P.G. (+), nitrate reductase (+) biotype was identified. The antibiotic susceptibility profile is almost pathognomonic for the 44 tested strains: sensitivity (100%) to ceftriaxone, to ceftazidime, to aztreonam: to contrimoxazole (96%) and to chloramphenicol (91%). Search for widen spectrum beta-lactamses and antibiotics resistance plasmids was negative. However, those strains that are multiples resistant, discharge others 8.1. isofocal point beta-lactamases. The R.F.L.P. study demonstrated a unique profile. The B. cepacia transmission is the result of the installation of medical reanimation equipment that are not well taken care of. The nosocomial infections ascertained so far are ordinary bacteremias. Strain's phenotypical and genotypical identification shows the presence of only one clone. To overcome there nosocomial infections, hygienic measures have to be reinforced.

Isolement et caracterisation de Burkholderia cepacia lors d'infections hospitalieres

"Le developpement des techniques de reanimation et d'explorations fonctionnelles a entraine une ""explosion des infections nosocomiales"". Cette etude porte sur les souches de Burkholderia cepacia isolees en 1996 dans un hopital pediatrique du CHU de Dakar; suite a l'installation d'aspirateurs tracheo-bronchiques servant au desencombrement des enfants. Les 44 souches de B.cepacia etudiees proviennent de 42 hemocultures pratiquees chez 29 garcons et 13 filles ages de 5 jours a 7 ans et de 2 aspirateurs. Les aspirateurs constituent la source de contamination. Toutes les souches produisent un pigment jaune-orange. Un seul biotype a ete identifie. Le profil de sensibilite aux antibiotiques est presque univoque pour les 44 souches testees. La transmission de B. cepacia resulte de l'installation d'appareil de reanimation medicale dont l'entretien pose probleme. Les infections nosocomiales constatees sont jusqu'ici des bacteriemies simples. L'identification phenotypique et genotypique des souches a montre la circulation d'un seul clone. Le renforcement des mesures d'hygiene est la meilleure solution a ces infections nosocomiales."

[Nosocomial Klebsiella pneumoniae infections at the Fann University Hospital Center, Dakar]. / Infections nosocomiales à Klebsiella pneumoniae au CHU de Fann, Dakar.

Twenty one (21) strains of Klebsiella pneumoniae are isolated from patients hospitalized since 48 hours for neurological affections, and from medical staff hands. Eighteen (18) other strains isolated from other clinics were studied for comparison. The identification used API20 E system (BioMérieux), and the susceptibility to antibiotics was tested by disc diffusion test (antibiogram). Production of extended-spectrum beta-lactamase was studied by synergy test method. Arbitrarily primed Polymerase Chain Reaction (AP-PCR) was used to compare the electrophoretic profiles of the strains. Nosocomial strains are more resistant than the other: 57.14% vs 16.67% (p = 0.02) and 28.57% among them are extended-spectrum beta-lactamase positive. Amikacin (87.5%) and Ciprofloxacin (100%) are the most efficient antibiotics, when Cotrimoxazole inhibits 31.25% of the strains. The electrophoretic profiles show an important diversity of strains and suggest an external contamination.

[Bacterial diversity during the cholera epidemic in Dakar, Senegal (1995-1996)]. / Diversité bactérienne au cours de l'épidémie de choléra à Dakar, Sénégal (1995-1996).

Vibrio cholerae O:1, serotype Ogawa and biotype El Tor (76.1%) was responsible of the outbreak of cholera in Dakar, Senegal (1995-1996). However, other bacteria were isolated, particularly Vibrio cholerae non O:1/non O:139, Vibrio fluvialis, Vibrio alginolyticus. Vibrio parahaemolyticus, Salmonella sp.p, Shigella sp.p (23.9%). The Vibrio cholerae O:1 strains are multiresistant to sulfonamide, cotrimoxazole and chloramphenicol. 97% were also resistant to O/129 compound. Fluoroquinolone and 3rd generation cephalosporins were the more efficient antibiotics (100%).

Infections nosocomiales a Klebsiella pneumoniae au CHU de Fann; Dakar

18 souches de Klebsiella pneumoniae ont ete isolees de malades hospitalises au CHU de Fann a Dakar pour affections neurologiques (par hemocultures et ECBU) et a partir de mains de personnels soignants. 18 souches isolees de malades provenant d'autres services ont servi de temoins. Toutes les souches ont ete testees a differents antibiotiques par la methode de diffusion en gelose et une lecture interpretative realisee. Les souches responsables d'infections nosocomiales se sont averees plus resistantes : 57;14 pour cent de phenotype de resistance contre 16;67 pour cent pour les temoins (p=0;02 pour cent). Les phenotypes notes sont : la production de penicillinase a tres haut niveau (28;57 pour cent) et la production de B-lactamase a spectre elargi (28;57 pour cent). L'amikacine (87;5 pour cent) et la Ciprofloxacine (100 pour cent) sont les antibiotiques les plus efficaces; tandis que le cotrimoxazole (31;25 pour cent) reste le moins actif sur les souches. Le profil electrophoretique des ADN bacteriens montre une grande diversite de souches; ce qui fait penser a une contamination par des sources externes