[Quality control of antibiotics used in Senegal]. / Contrôle de la qualité de quelques molécules antibiotiques utilisées au Sénégal.

To slow the spread of bacterial resistance and promote safety in the use of medicines, development of quality control tools is indispensable. The purpose of this study was to evaluate the quality of several antibiotic agents used in Senegal and to assess the utility of the mini laboratory as a quality control tool. The mini laboratory and all materials necessary for this study were provided by the German Pharma Health Fund. A total of 34 antibiotic samples were submitted to a battery of tests including physical and visual inspection, disintegration, and thin layer chromatography designed for identification and semiquantitative evaluation. Non-conformities detected by physical and visual inspection were found mainly in products from the illicit sector (80%) but some non-conformities were also found in products from licit private sector (20%). Based on thin layer chromatography findings, non-conformities in product identity and dosage involved mainly erythromycin (45%) followed by amoxicillin and ciprofloxacin (22% each). Again this type of non-conformity was most frequent in products from the illicit sector (45%) but it was also observed in products from the private and public sectors (33% and 22% respectively). These findings show that follow-up is necessary to ensure the quality of medicines, especially antibiotics. In this study the mini laboratory was a highly useful quality control tool.

Controle de la qualite de quelques molecules antibiotiques utilisees au Senegal

Pour ralentir la propagation de la resistance bacterienne et promouvoir un usage securise des medicaments; il s'avere necessaire de developper des outils de controle et de gestion de leur qualite. Notre travail a pour objectifs d'evaluer la qualite de quelques molecules antibiotiques utilisees au Senegal et de demontrer la pertinence de l'utilisation du mini laboratoire comme outil de controle de cette qualite. Le mini-laboratoire de la German Pharma Health Fund fournit l'ensemble du materiel necessaire a l'etude.Au total; 34 echantillons d'antibiotiques ont ete soumis a une batterie de tests comportant l'inspection physique et visuelle des echantillons; le test de desagregation et la chromatographie sur couche mince pour l'identification et l'appreciation semi quantitative. Sur l'ensemble des non-conformites a l'inspection physique et visuelle; 80proviennent du secteur illicite (non officiel) et 20du secteur prive (officiel). Les non-conformites a l'identification et au dosage concernent l'erythromycine; suivie de l'amoxicilline et de la ciprofloxacine pour 22des cas chacune. Le secteur illicite est egalement le plus touche par ce type de non conformite (45); les secteurs prive et public ne sont pas non plus epargnes avec respectivement 33 et 22des echantillons non-conformes. Il est ainsi important d'assurer un suivi de la qualite desmedicaments en particulier des plus sensibles comme les antibiotiques. En cela ce mini-laboratoire peut etre d'un grand apport

[Study of the contents in fat, in protein and in vitamin D of powdered milk varieties sold in Dakar]. / Etude des teneurs en matiere grasse, proteines et vitamine D de varietes de lait en poudre vendu a Dakar.

INTRODUCTION: The powdered milk is a much appreciated food in Senegal. However no particular control is realized by authorities on the various marks of milk imported before their marketing. In the concern to protect the health of the consumers, but especially in front of the very big variety of the sources of supply in this product we determined the contents in fat, in protein and in vitamin D main variety show of marketed powdered milk Dakar. MATERIAL AND METHODS: Chemical methods were operated to determine the fat contents and in proteins. The liquid chromatography in high performance was used to identify and measure the vitamin D. RESULTS: The obtained results profits showed that all the studied samples of milk had contents in fat included between 25 and 31 g %, those in proteins were included between 23 and 25 g %. As regards the dosage of the vitamin D, a single sample had content weaker than that mentioned on the packaging by the manufacturer. CONCLUSION: The results of this study allowed to notice most of the variety varieties of powdered milk marketed in Dakar were in accordance with the standards established for this food and are consequently good quality.

[Control of the quality of antiretroviral medicines used in Senegal]. / Controle de la qualite des medicaments antiretroviraux utilises au Senegal.

INTRODUCTION: Success of any program to fight AIDS passes through out quality of antiretroviral medicines. The control and follow-up of the quality of these medicines constitute essential levers to guarantee quality. Our study aims to evaluate the quality of antiretroviral medicines used in Senegal by means of a mini laboratory from the German Pharmaceutical Health Fund. MATERIALS AND METHODS: The mini laboratory provides technical arsenal necessary for the analysis. To sum up, 43 samples of antiretroviral medicines have been submitted to three types of simple, quick and reliable tests which are physical and visual inspection, disintegration and thin layer chromatography. RESULTS: The obtained results give at physical and visual inspection, 9.3% of samples which are not similar. 30 samples out of 32 have a good disintegration time. About 11.6% of samples are not similar to thin layer chromatography. CONCLUSION: The control of the quality of antiretroviral medicines is necessary if we consider the number of no conform cases which are relatively important. The mini laboratory can constitute an interesting tool for technical control facilities in developing countries that suffer from a real lack of materials.

[Quality of butter sold in Dakar (Sénégal)]. / Etude de la qualité des beurres vendus a Dakar (Sénégal).

Among foods that are introduced in Senegal, butter takes a significant place particularly at home where it is frequently eaten. Nevertheless, Senegalese authorities don't carry out any quality control under those different types (mark) of butter. In consequence, to find butter without quality or characteristics of authentic butter may be high. The aim of this work is to analyse quality of main varieties of butter in Dakar market. Chemical methods were used to determine the characteristic of butter samples and gas chromatography was made to authentify their fatty acid profile. Our results have shown that most of analysed sample respected the standards of quality. In fact the composition of fatty acid and characteristic factors of authentic butter were certified by this study.

[Mango leaves (Manguifera indica, Anacardiacea) used as biomarker of pollution by pp'Dichlorodiphenyltrichloroethane (pp'DDT)]. / Utilisation des feuilles de manguier (Manguifera indica, Anacardiacea) comme bioindicateur de pollution par le pp'Dichlorodiphényltri-Chloroéthane (pp'DDT).

Dichlorodiphenyltrichloroethane (DDT), organochlorine pesticide, byanother way cumulative pesticide is banned in mostdeveloped countries. Whatever, it is still used in many countries in the Third World. This work consist to check whether this chemical compound is still used in Senegal. The biomarker of pollution by this pesticide for this research was mango leaves (mango tree is widespread in Senegal) open to accumulate halogenated hydrocarbons. Leaves sample were taken in many sites in the centerline of Dakar-Thiès (Senegal), then analysed by gas chromatography. The results allowed to note the presence of DDT and its metabolites [(dichlorodiphenyltrichloroethylen (DDE), (dichlorodiphenyltrichloroethane (DDD)] in most of samples. The comparison of DDT content in relation to those of the principal metabolite allowed to make the difference according to sample sites, an old contamination of an utilisation more or less recent of this pesticide. From those results, we can conclude that DDT, typical pesticide by its big persistence is still used in some spherical zones in this country, in particular in farming gardening zones.

[Aflatoxin contamination level in artisanal and industrial peanut butter food in Dakar (Senegal)]. / Niveaux de contamination par les aflatoxines des pâtes d'arachide alimentaires de préparation artisanale et industrielle de Dakar (Senegal).

Aflatoxins are mycotoxins produced by some strains of fungus (Aspergillus) which develop in peanut seeds. Peanut oil and past are very used up in Senegal, then the aflatoxin poisoning risk is very actual. The aim of this study was to determinate the aflatoxin level in artisanal and industrial peanut pastry food from Dakar (Sénégal). High Performance Liquid Chromatography (HPLC) analysis of the different samples showed that the most contaminated by aflatoxins are artisanal pastry sold in different market of Dakar (Sénégal). Indeed, 40% of these samples contained mean values of aflatoxin B1 (the most dangerous) widely over allowable EEC specifications (5ppb). Furthermore, most of industrial and domestic peanut pastry were cleaned and could be consumed without risk.

[Aflatoxins in food: tests of decontamination of peanut cakes by ionizing treatment]. / Aflatoxines dans les aliments: essais de décontamination des tourteaux d'arachide par traitement ionisant.

The efficacy of ionising treatment for decontaminating peanut cakes was tested. The influence of cakes water content and the effect of ionisation dose rate were studied. The results obtained after a reverse phase liquid chromatographic determination of B1, B2, G1 and G2 aflatoxins have revealed an important contamination of the peanut cakes (up to 1000 ppb of total aflatoxin's contents). After ionising treatment at 25 kGy, the aflatoxins degradation in peanut cake's was less important in dried samples (about 5-10% at 0.55 water activity: aw) than in the humid ones (40-60% degradation at 0.95 water activity). At this dose, any indicative difference of the degradation rate of aflatoxins, with regard to the ionising process was observed. The efficacy of ionising treatment for decontaminating peanut cakes could probably be improved, however the economic interest of such process as alternative of the treatment with ammonia is questionable.

[Pesticide bioaccumulation: measurement and levels of organochlorine residues in products of vegetable origin]. / Bioaccumulation des pesticides: recherche et dosage de résidus d'organochlorés dans les produits d'origine végétale.

Because of their lipophilic properties and their persistence, organochlorine pesticides residues can be accumulated in human body by consuming regularly plants products. This study consisted of the monitoring of the contamination level of pesticides residues from various plants products, in order to assess the long- term intoxication risk to which Senegalese consumer is exposed ant identify throughout these plants some indicators of atmospheric pollution. The chromatographic analysis of medicinal plants, fruits and vegetables extracts showed that they could be contaminated by organochlorine residues. About ten of these pesticides residues were found confirming that the analysed plants were really contaminated. The residues level in medicinal plants (from 0.1 to 45 micrograms/kg) were widely below the maximum allowed concentrations and were also lower than those in fruits and vegetables (from 0.1 microgram/kg to 460 micrograms/kg). Heptachlorine residues contents of tomatoes and citrus fruits were higher than FAO/WHO norms, so that, a regular monitoring of the plants products is recommended for better protection of consumers.

[Measurement and levels of aflatoxins in small-scale pressed peanut oil prepared in the Diourbel and Kaolack regions of Senegal]. / Recherche et dosage des aflatoxines dans l'huile de pression artisanale préparée dans les regions de Diourbel et Kaolack (Sénégal).

Aflatoxins are mycotoxins produced by some strains of fungus (Aspergillus) which develops in peanuts seeds. Peanuts oil and past are very used up in Senegal, then the aflatoxins poisoning risk are very actual. This study relates to the determination of contamination levels by aflatoxins from peanut oil food prepared by small scale production in areas of Kaolack and Diourbel. High Performance Liquid Chromatography (HPLC) analysis of the different samples showed that 80% of them were contaminated in the areas of Kaolack and Diourbel. Aflatoxin B1, B2, G1 and G2 has been detected with a profile of contamination almost identical in the both areas. Aflatoxin B1 was prevalent and has been found in over 85% of samples. Mean contents of this mycotoxin (the most dangerous toxin) is about 40 ppb, value widely superior to allowable specifications.