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1.
Artigo em Inglês | MEDLINE | ID: mdl-37476660

RESUMO

Background: The tobacco epidemic is one of the biggest public health threats the world has ever faced. Shisha use has recently been gaining increased popularity in many developed and developing countries. Objectives: To determine the prevalence of shisha use among students in Ouagadougou, Burkina Faso, and associated knowledge, smoking practices and beliefs about health effects. Methods: A total of 443 students were selected for this cross-sectional study, using a stratified sampling method. Data on shisha use, knowledge about shisha, shisha smoking practices, and factors associated with use of shisha were collected via a questionnaire. The association between the independent variables and shisha use was assessed using a χ² test (p<0.05). Binary logistic regression analysis was used to determine variables that were independently associated with shisha smoking. Results: Of the 421 respondents, 162 (38.5%) indicated that they had smoked shisha; 14.0% were regular smokers. We found that 183 students (43.5%) had poor knowledge about the health effects of shisha. The main reasons for shisha smoking were being in the company of friends who were users (57.4%), the pleasant flavour and fragrance of shisha (25.9%), and fashion (22.2%). Ninety-nine shisha smokers (61.1%) also consumed alcohol. Factors associated with shisha smoking included age <20 years (p<0.001), gender (p=0.034), and educational level of the respondent's father (p=0.0001) and mother (p=0.0004). Conclusion: We found a relatively high prevalence of shisha smoking among the students, and that 43.5% of them had poor knowledge about its effects on health. Developing surveillance, intervention and regulatory/policy frameworks specific to shisha has become a public health priority. Study synopsis: What the study adds. The study provides additional data from resource-poor settings such as Burkia Faso, where there is an overall high prevalence of Sisha smoking, and also among students who are poorly informed about the health effects of smoking. Implications of the findings. The data informs advocacy and intervention strategies to combat smoking and decrease overall tobacco use in an African setting.

2.
Rev Mal Respir ; 40(9-10): 725-731, 2023.
Artigo em Francês | MEDLINE | ID: mdl-37866979

RESUMO

INTRODUCTION: General anaesthesia and surgery increase morbidity and mortality in patients with obstructive sleep apnea hypopnea syndrome (OSAHS) who are not known to have OSAHS and therefore not treated before surgery. The objective of this study is to evaluate the risk of OSAHS using the STOP-BANG questionnaire (SBQ) in patients undergoing general anaesthesia in Burkina Faso. MATERIAL AND METHOD: This is a cross-sectional study concerning patients having received pre-anaesthetic consultation from 1st July 2020 to 30th June 2021. Risk of OSAHS is considered "medium to high" when the risk of obstructive sleep apnea is medium or high on SBQ. RESULTS: Our population consisted in 599 persons. A medium to high risk of OSAHS was found in 11.18%. The ASA score and the Mallampati scale were independently associated with moderate to high risk of OSAHS (P<0.001; P<0.001). ASA score of I and Mallampati class of I decreased the risk of OSAHS by 17 and 45% respectively (P=0.012; P=0.031). CONCLUSION: The risk of OSAHS in this population is comparable to that of the general population. Confirmation of OSAHS by ventilatory polygraphy or polysomnography would help to achieve further precision.


Assuntos
Apneia Obstrutiva do Sono , Humanos , Burkina Faso/epidemiologia , Estudos Transversais , Apneia Obstrutiva do Sono/complicações , Apneia Obstrutiva do Sono/diagnóstico , Apneia Obstrutiva do Sono/epidemiologia , Polissonografia , Síndrome , Anestesia Geral/efeitos adversos
3.
Rev Mal Respir ; 40(5): 382-390, 2023 May.
Artigo em Francês | MEDLINE | ID: mdl-37062632

RESUMO

INTRODUCTION: Chronic respiratory diseases, particularly asthma and Chronic Obstructive Pulmonary Disease (COPD), pose a significant threat to public health. This study aims to determine the accessibility and affordability of means of diagnosis and treatment. METHODS: This was a cross-sectional study covering the period from August to December 2021 in Ouagadougou, Burkina Faso. This study involved 107 health centers and 135 pharmacies. The World Health Organization/Health Action International definition was used as a benchmark for accessibility to medicines. RESULTS: Out of 107 health centers, 29 (27.1%) had a spirometer. The average cost of spirometry represented 19.88 days of salary for a patient paid at the minimum wage. The most widely available drugs were salbutamol in a pressurized metered dose inhaler (pMDI) (88.1%) and prednisone 20mg tablet (87.4%). No disease-modifying drug was available in public pharmacies. Affordable drugs were salbutamol 4mg tablet and aminophylline 100mg tablet. CONCLUSION: The means of diagnosis and treatment of asthma and COPD are insufficiently available, especially in the public sector, which is characterized by a nearly total absence of basic treatment.


Assuntos
Asma , Doença Pulmonar Obstrutiva Crônica , Humanos , Burkina Faso/epidemiologia , Estudos Transversais , Asma/diagnóstico , Asma/tratamento farmacológico , Asma/epidemiologia , Doença Pulmonar Obstrutiva Crônica/diagnóstico , Doença Pulmonar Obstrutiva Crônica/tratamento farmacológico , Doença Pulmonar Obstrutiva Crônica/epidemiologia , Albuterol/uso terapêutico , Custos e Análise de Custo , Acessibilidade aos Serviços de Saúde
4.
New Microbes New Infect ; 42: 100907, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34188939

RESUMO

Noma or cancrum oris is a multi-bacterial and opportunistic infection that destroys soft tissue, as well as muscle and bone, and can be fatal. We present a rare case of Noma in a 32-year-old Malian woman, from whom we isolated an Escherichia coli extended-spectrum beta-lactamase.

5.
J Nematol ; 41(2): 120-7, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22661784

RESUMO

A comprehensive survey of the plant parasitic nematodes associated with cowpea (Vigna unguiculata) production fields was carried out in the three primary agro-climatic zones of Burkina Faso in West Africa. Across the three zones, a total of 109 samples were collected from the farms of 32 villages to provide a representative coverage of the cowpea production areas. Samples of rhizosphere soil and samples of roots from actively growing cowpea plants were collected during mid- to late-season. Twelve plant-parasitic nematode genera were identified, of which six appeared to have significant parasitic potential on cowpea based on their frequency and abundance. These included Helicotylenchus, Meloidogyne, Pratylenchus, Scutellonema, Telotylenchus, and Tylenchorhynchus. Criconemella and Rotylenchulus also had significant levels of abundance and frequency, respectively. Of the primary genera, Meloidogyne, Pratylenchus, and Scutellonema contained species which are known or suspected to cause losses of cowpea yield in other parts of the world. According to the prevalence and distribution of these genera in Burkina Faso, their potential for damage to cowpea increased from the dry Sahelian semi-desert zone in the north (annual rainfall < 600 mm/year), through the north-central Soudanian zone (annual rainfall of 600-800 mm/year), to the wet Soudanian zone (annual rainfall ≥ 1000 mm) in the more humid south-western region of the country. This distribution trend was particularly apparent for the endoparasitic nematode Meloidogyne and the migratory endoparasite Pratylenchus.

6.
Bull Soc Pathol Exot ; 102(1): 36-40, 2009 Feb.
Artigo em Francês | MEDLINE | ID: mdl-19343919

RESUMO

To investigate the sector of food sold in the streets of Bobo-Dioulasso and identify relevant information for action, a survey on knowledge and practices of street food vendors and consumers was conducted in June 2005. Data have been collected in 928 street food selling posts. Structured questionnaires were used to collect data from 874 street vendors and 2474 consumers. Street food sites are concentrated in places where administration and trade activities are usually running. The street food seller is a married and illiterate woman of 32 years old. Cereals (48.5%), meat (33.9%), milk (9.6%) and fruits (4.4%) are the basic consumables. The street food consumer is a non married man, 27 years old working in profit-making activity. Consumers use many criteria to choose the place to eat, at times or permanently. The street food sector represents a source of income and induces change in household eating habits. Street food in Bobo-Dioulasso needs to be better organised, by using an holistic approach that involves all the actors.


Assuntos
Alimentos/normas , Adulto , Animais , Burkina Faso , Ingestão de Alimentos , Grão Comestível/normas , Escolaridade , Comportamento Alimentar , Feminino , Manipulação de Alimentos/normas , Humanos , Higiene/normas , Carne/normas , Leite/normas , Adulto Jovem
7.
Phytother Res ; 22(4): 550-1, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-17926335

RESUMO

'Saye', a traditional medicine used in Burkina Faso, which consists of extracts of Cochlospermum planchonii (rhizome), Cassia alata (leaf) and Phyllanthus amarus (whole plant), showed a significant effect against Plasmodium falciparum and Plasmodium berghei parasites grown in vivo (IC(50) = 80.11 +/- 3.40 microg/mL; ED(50) = 112.78 +/- 32.32 mg/kg). In vitro the activity was lower.


Assuntos
Antimaláricos/farmacologia , Malária/prevenção & controle , Medicinas Tradicionais Africanas , Plasmodium berghei/efeitos dos fármacos , Plasmodium falciparum/efeitos dos fármacos , Animais , Antimaláricos/isolamento & purificação , Burkina Faso , Malária/parasitologia , Malária Falciparum/parasitologia , Malária Falciparum/prevenção & controle , Camundongos , Plantas Medicinais/química
8.
S. Afr. respir. j ; 29(1): 6-11, 2023. tables
Artigo em Inglês | AIM | ID: biblio-1437395

RESUMO

Background.The tobacco epidemic is one of the biggest public health threats the world has ever faced. Shisha use has recently been gaining increased popularity in many developed and developing countries.Objective. To determine the prevalence of shisha use among students in Ouagadougou, Burkina Faso, and associated knowledge, smoking practices and beliefs about health effects.Method. A total of 443 students were selected for this cross-sectional study, using a stratified sampling method. Data on shisha use, knowledge about shisha, shisha smoking practices, and factors associated with use of shisha were collected via a questionnaire. The association between the independent variables and shisha use was assessed using a χ2 test (p<0.05). Binary logistic regression analysis was used to determine variables that were independently associated with shisha smoking.Results.Of the 421 respondents, 162 (38.5%) indicated that they had smoked shisha; 14.0% were regular smokers. We found that 183 students (43.5%) had poor knowledge about the health effects of shisha. The main reasons for shisha smoking were being in the company of friends who were users (57.4%), the pleasant flavour and fragrance of shisha (25.9%), and fashion (22.2%). Ninety-nine shisha smokers (61.1%) also consumed alcohol. Factors associated with shisha smoking included age <20 years (p<0.001), gender (p=0.034), and educational level of the respondent's father (p=0.0001) and mother (p=0.0004).Conclusion. We found a relatively high prevalence of shisha smoking among the students, and that 43.5% of them had poor knowledge about its effects on health. Developing surveillance, intervention and regulatory/policy frameworks specific to shisha has become a public health priority.


Assuntos
Humanos , Masculino , Feminino , Estudantes , Nicotiana , Tabagismo , Fumar , Prática de Saúde Pública , Estudos Transversais , Cachimbos de Água , Cultura
9.
Clin Pharmacol Ther ; 82(2): 197-203, 2007 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-17361129

RESUMO

Metabolism of the antimalarial drug amodiaquine (AQ) into its primary metabolite, N-desethylamodiaquine, is mediated by CYP2C8. We studied the frequency of CYP2C8 variants in 275 malaria-infected patients in Burkina Faso, the metabolism of AQ by CYP2C8 variants, and the impact of other drugs on AQ metabolism. The allele frequencies of CYP2C8*2 and CYP2C8*3 were 0.155 and 0.003, respectively. No evidence was seen for influence of CYP2C8 genotype on AQ efficacy or toxicity, but sample size limited these assessments. The variant most common in Africans, CYP2C8(*)2, showed defective metabolism of AQ (threefold higher K(m) and sixfold lower intrinsic clearance), and CYP2C8(*)3 had markedly decreased activity. Considering drugs likely to be coadministered with AQ, the antiretroviral drugs efavirenz, saquinavir, lopinavir, and tipranavir were potent CYP2C8 inhibitors at clinically relevant concentrations. Variable CYP2C8 activity owing to genetic variation and drug interactions may have important clinical implications for the efficacy and toxicity of AQ.


Assuntos
Amodiaquina/metabolismo , Hidrocarboneto de Aril Hidroxilases/metabolismo , Malária Falciparum/tratamento farmacológico , Polimorfismo Genético , Alcinos , Amodiaquina/análogos & derivados , Amodiaquina/farmacologia , Antimaláricos/metabolismo , Antimaláricos/farmacologia , Hidrocarboneto de Aril Hidroxilases/genética , Benzoxazinas/metabolismo , Benzoxazinas/farmacologia , Burkina Faso , Cromatografia Líquida de Alta Pressão , Ciclopropanos , Citocromo P-450 CYP2C8 , Relação Dose-Resposta a Droga , Interações Medicamentosas , Inibidores Enzimáticos/metabolismo , Inibidores Enzimáticos/farmacologia , Genótipo , Inibidores da Protease de HIV/metabolismo , Inibidores da Protease de HIV/farmacologia , Humanos , Lopinavir , Malária Falciparum/genética , Malária Falciparum/metabolismo , Modelos Biológicos , Piridinas/metabolismo , Piridinas/farmacologia , Pirimidinonas/metabolismo , Pirimidinonas/farmacologia , Pironas/metabolismo , Pironas/farmacologia , Inibidores da Transcriptase Reversa/metabolismo , Inibidores da Transcriptase Reversa/farmacologia , Saquinavir/metabolismo , Saquinavir/farmacologia , Espectrofotometria Ultravioleta , Sulfonamidas , Resultado do Tratamento , Trimetoprima/metabolismo , Trimetoprima/farmacologia
10.
Sante ; 17(2): 79-86, 2007.
Artigo em Francês | MEDLINE | ID: mdl-17962155

RESUMO

BACKGROUND: Improvement in management systems for tuberculosis (TB) care is urgently needed in West Africa. In 2003, an experimental action research network began there, involving care providers, health system managers, and TB programme managers. Each project in all 6 countries used a "patient-centered" approach to improve tuberculosis case management. METHODS: The research teams included care providers, district medical officers, anthropologists and TB programme managers. Each research team conducted its project for a one-year period and then assessed its results. The specific problems identified were low TB detection rates (Burkina Faso, Côte d'Ivoire and Niger) and poor compliance among patients receiving treatment, including their ensuing loss to follow-up (Benin, Mali and Senegal). Investigators concluded that these weaknesses were due to the lack of access to care (geographical, financial and cultural), the complexity of the care system and the low quality of care. Solutions for all 6 countries aimed at improving access to high-quality care. RESULTS: One year after the experiment began, results varied from one country to another. In general, all participants understood the need to collaborate beyond national health systems because the problems from all 6 countries were quite similar. The research process led to better sharing of work between care providers and sometimes between care providers and TB patients. It provided participants with new concepts and a constant opportunity to implement them. These repeated meetings, however, keep care providers away from their offices. CONCLUSION: The research would have improved case management and care more effectively had the teams taken into account the psychological and sociological need of TB patients. A new regional dynamic has begun and must be pursued to help improve health care systems.


Assuntos
Qualidade da Assistência à Saúde/normas , Tuberculose/terapia , África Ocidental , Pesquisa Biomédica , Humanos
11.
Int J Tuberc Lung Dis ; 10(1): 93-8, 2006 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-16466044

RESUMO

SETTING: In West Africa, national tuberculosis programmes (NTPs) face many problems due to the low performance of health care delivery systems and patients' social and cultural environment. OBJECTIVE: To improve the case management of TB in Burkina Faso. DESIGN: Using the operational research process as a tool, TB case management was decentralised from the district hospital to eight primary health care centres in 2003. RESULTS: Twelve months after decentralisation, the quality of case detection remained satisfactory. The delay between the identification of TB suspects with chronic cough and the confirmation of TB was reduced from 13 to 6 days. The detection rate of TB suspects during the study (30%) was twice as high as for 2001 and 2002 (15%). However, the detection rate for smear-positive TB cases decreased from 32.3% in 2001 and 2002 to 6.5% during the year of the study. CONCLUSION: Sufficient time and commitment are essential to obtain a case management system that is decentralised and effective. Efforts therefore need to continue to obtain more information and better results.


Assuntos
Administração de Caso/organização & administração , Centros Comunitários de Saúde , Tuberculose Pulmonar/tratamento farmacológico , Burkina Faso , Acessibilidade aos Serviços de Saúde , Hospitais de Distrito , Humanos , Cooperação do Paciente , Tuberculose Pulmonar/diagnóstico
12.
Bull Soc Pathol Exot ; 99(3): 161-5, 2006 Jul.
Artigo em Francês | MEDLINE | ID: mdl-16983817

RESUMO

The therapeutic efficacy of chloroquine (CQ) and sulfadoxine-pyrimethamine (SP) was determined over a 4 year period (1998-2001) in Bobo Dioulasso, Burkina Faso, with an analysis of the risk factors associated to treatment failures to the 2 drugs. In total, 2008 children (6 months-15 years old) attending in 4 health centres (1 urban and 3 rural) were included in the study. Children were alternatively allocated to either CQ or SP The WHO 14-days in vivo field test was carried out. PCV was measured at day 0 and 14. CQ treatment failure was 24.4% (229/940), most of them being late failures. Between 1998 and 2001 a significant increase in CQ treatment failure (p < 0.001) was observed. SP showed a good efficacy with a total treatment failure of 4.4% (33/749). However; a significant increase of resistance to this drug (p=0.001) was also observed between 1998 and 2001. Among children with anaemia at day 0.85% (23/27) were no more anaemic by day 14 in the SP group, while in the CQ group the proportion was lower; 69% (27/39). However the difference between the two drugs was not significant (p > 0.1). Univariate analysis showed that the site, the age of children, the time of recruitment and the parasitaemia were significantly associated with CQ treatment failure. In the multivariate analysis these 4 variables remain significantly and independently associated with the risk of CQ treatment failure. After adjusting for the effect of the 3 other factors, the risk of treatment failure was reduced by half in rural area compared to urban area as well as in children of 5-15 years of age compared to those under 5. The risk of treatment failure was significantly increased in 2000-2001 (OR = 1.66, p < 0.05) as compared to the 2 previous years (1998-1999). It was also twice higher in children with parasitaemia > or = 16,000/microl than in those having a lower parasitaemia. For SP we have not observed such connexions with the univariate and multivariate analysis.


Assuntos
Antimaláricos/farmacologia , Cloroquina/farmacologia , Plasmodium falciparum/efeitos dos fármacos , Pirimetamina/farmacologia , Sulfadoxina/farmacologia , Adolescente , Animais , Burkina Faso , Criança , Pré-Escolar , Combinação de Medicamentos , Humanos , Lactente , Testes de Sensibilidade Parasitária , Fatores de Risco , Falha de Tratamento
13.
Pak J Biol Sci ; 19(4): 171-178, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-29022993

RESUMO

OBJECTIVE: Cassia alata L. (Fabaceae), one of the three plants contained in Saye, a polyherbal antimalarial remedy was assessed for its antimalarial potential and safety in mice. METHODOLOGY: Organic extracts were prepared from the leaves and tested on the D 10 chloroquine-sensitive strain of Plasmodium falciparum using the parasite lactate dehydrogenase assay. The 4 days suppressive test using Plasmodium berghei in mice was used to evaluate the in vivo antiplasmodial activity of the extracts. Animals were treated by oral route, once a day with 50, 100, 250 and 400 mg kg -1 b.wt., of the extracts. The acute toxicity of the extracts was assessed in mice according to Thompson and Weil method. The lethal effects of the extracts on animal's body weight, tissues, biochemical and haematological parameters were determined at 823.5, 1235.5, 1853 and 2779.5 mg kg -1 b.wt., respectively. RESULTS: The dichloromethane/methane (1:1, v/v) extract of Cassia alata was the most active against Plasmodium falciparum. The mean percent suppression of parasitemia in mice was equal to 22.5, 41.8 and 45.2% at 50, 250 and 400 mg kg -1 b.wt., respectively. No death and no clinically significant changes were recorded in mice. The maximum non-lethal dose was more than 16875 mg kg -1 in animals. No significant changes were observed in body weight, tissues morphology, biochemical and hematological parameters at doses above or equal to 2779.5 mg kg -1 b.wt. CONCLUSION: The dichloromethane/methanol leaf extract of Cassia alata had a good to moderate in vitro and in vivo antiplasmodial activity and was found to have low toxicity at high doses in tested animals.


Assuntos
Antimaláricos/farmacologia , Cassia/química , Malária Falciparum/tratamento farmacológico , Extratos Vegetais/farmacologia , Folhas de Planta/química , Plasmodium falciparum/efeitos dos fármacos , Animais , Antimaláricos/isolamento & purificação , Antimaláricos/toxicidade , Modelos Animais de Doenças , Feminino , L-Lactato Desidrogenase/metabolismo , Dose Letal Mediana , Malária Falciparum/sangue , Malária Falciparum/parasitologia , Masculino , Dose Máxima Tolerável , Metanol/química , Cloreto de Metileno/química , Camundongos , Testes de Sensibilidade Parasitária , Fitoterapia , Extratos Vegetais/isolamento & purificação , Extratos Vegetais/toxicidade , Plantas Medicinais , Plasmodium falciparum/enzimologia , Plasmodium falciparum/crescimento & desenvolvimento , Proteínas de Protozoários/metabolismo , Solventes/química
14.
Am J Trop Med Hyg ; 50(6): 699-704, 1994 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-8024062

RESUMO

To understand the evolution of drug-resistant forms of malaria in time and in space, we carried out an analysis of the results of a series of passive and active surveys conducted in Burkina Faso between 1982 and 1991. A total of 607 tests for resistance to chloroquine and mefloquine were carried out in vitro and 3,679 tests for resistance to chloroquine, quinine, and sulfadoxine-pyrimethamine were performed in vivo. The surveys principally involved the two main cities of Burkina Faso, Ouagadougou and Bobo-Dioulasso. However, another 10 locations representing the three different zones of malaria transmission were also studied. The first cases of Plasmodium falciparum resistant to chloroquine in vitro were reported in 1983, but it was only in 1988 that in vivo resistance appeared. The first cases of in vitro resistance to mefloquine were noted in 1987 while chloroquine sensitivity at a high rate (15.8%), which decreased during the following years. The prevalence of resistance to chloroquine increased in parallel to this decrease in sensitivity to an overall peak of 41% in vitro and 16% in vivo in 1990. These rates then decreased to 3% and 6%, respectively, in 1991. This pattern of decreasing resistance was broadly similar in all sites except for the town of Bobo-Dioulasso, where the level of resistance remained stable at approximately 14% from 1988 to 1991. Only two cases of resistance in vivo to sulfadoxine-pyrimethamine were noted.(ABSTRACT TRUNCATED AT 250 WORDS)


Assuntos
Antimaláricos/farmacologia , Malária Falciparum/parasitologia , Plasmodium falciparum/efeitos dos fármacos , Adolescente , Animais , Antimaláricos/uso terapêutico , Burkina Faso/epidemiologia , Criança , Cloroquina/farmacologia , Cloroquina/uso terapêutico , Resistência a Medicamentos , Humanos , Estudos Longitudinais , Malária Falciparum/tratamento farmacológico , Malária Falciparum/epidemiologia , Mefloquina/farmacologia , Prevalência , Pirimetamina/farmacologia , Pirimetamina/uso terapêutico , Quinina/farmacologia , Quinina/uso terapêutico , Estudos Retrospectivos , Sulfadoxina/farmacologia , Sulfadoxina/uso terapêutico
15.
Trans R Soc Trop Med Hyg ; 97(6): 713-6, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-16117970

RESUMO

In Anopheles gambiae, as in most species of mosquitoes, mating is initiated in flight. The males aggregate in aerial swarms and conspecific females individually fly to these swarms where they mate with males. In this study, we investigated the swarming behaviour of A. gambiae and conducted 2 surveys in the rice field area of the Vallée du Kou in Burkina Faso in 1999 and 2002. A high number of anopheline mosquitoes were observed in this area and both molecular M and S forms of A. gambiae were found in sympatry. Swarms formed a few minutes after sunset in different places and no obvious markers were associated with their occurrence. However, swarms occurred close to cow herds generally in open flat areas, 2-3 m above the ground. Overall, 2829 anopheline mosquitoes were collected from 21 swarms composed primarily of males. A few specimens of Culex quinquefasciatus were collected from 3 swarms. Although both molecular M and S forms were found in sympatry in the village, swarms were composed almost exclusively of the molecular M form. This suggests that there are alternative swarming habits for both molecular M and S forms of A. gambiae in nature.


Assuntos
Anopheles/fisiologia , Comportamento Sexual Animal/fisiologia , África Ocidental , Animais , Anopheles/classificação , Feminino , Masculino
16.
Parassitologia ; 45(1): 27-31, 2003 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15270541

RESUMO

Antifolate resistance isolates of Plasmodium falciparum in the blood of 56 patients was investigated by using PCR technology. DNA was extracted with three different methods from parasite lysate by phenol-chloroform, or from whole blood and from blood collected onto dry filter paper, by chelex-100. The expected 727-bp PCR product was obtained in all samples extracted by chelex-100, while three samples prepared by phenol-chloroform failed to show any amplified product. The crucial point mutation within the dhfr gene leading to pyrimethamine and cycloguanil resistance is localised in an Alul recognition site. Thus, the 727-bp PCR product was submitted to endonuclease digestion. Fifty out of the 56 blood samples analysed yielded the two expected restriction fragments and an undigested 727-bp band. These 50 samples likely represent mixed infection as also confirmed the specific mutation PCR. The six undigested samples amplify a 339-bp fragment using a nested PCR-specific for pyrimethamine resistance mutation. Our results show that, the rapid DNA extraction from blood using chelex-100 and the PCR endonuclease assay can be efficiently used for accurate chemosensitivity analysis in the field.


Assuntos
Antimaláricos/farmacologia , Análise Mutacional de DNA/métodos , DNA de Protozoário/genética , Resistência a Medicamentos/genética , Antagonistas do Ácido Fólico/farmacologia , Plasmodium falciparum/efeitos dos fármacos , Proteínas de Protozoários/genética , Tetra-Hidrofolato Desidrogenase/genética , Substituição de Aminoácidos , Animais , Antimaláricos/uso terapêutico , DNA de Protozoário/sangue , Antagonistas do Ácido Fólico/uso terapêutico , Humanos , Malária Falciparum/tratamento farmacológico , Malária Falciparum/parasitologia , Mutação de Sentido Incorreto , Parasitemia/tratamento farmacológico , Parasitemia/parasitologia , Plasmodium falciparum/genética , Mutação Puntual , Reação em Cadeia da Polimerase/métodos , Polimorfismo de Fragmento de Restrição , Proguanil/farmacologia , Pirimetamina/farmacologia
17.
J Am Mosq Control Assoc ; 20(2): 195-6, 2004 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-15264630

RESUMO

The leu-phe kdr mutation was detected in a specimen of Anopheles arabiensis during an extensive survey of pyrethroid resistance in An. gambiae s.l. in Burkina Faso. The detection of this mutation in An. arabiensis, which had so far been observed only in An. gambiae s.s., is important at both epidemiologic and fundamental levels. It can be useful to understand the history of this gene throughout the range of An. gambiae complex.


Assuntos
Anopheles/genética , Resistência a Inseticidas/genética , Animais , Burkina Faso , Mutação/genética
18.
Bull Soc Pathol Exot ; 94(2 Pt 2): 188-91, 2001 Jul.
Artigo em Francês | MEDLINE | ID: mdl-16579075

RESUMO

Plasmodium falciparum in vitro susceptibility to chloroquine, quinine, mefloquine and halofantrine was investigated in patients living in Bobo-Dioulasso (Burkina Faso, West Africa). Our study was carried out from July to November 1997 at the Malaria Chemoresistance Reference Centre, Centre MurazIOCCGE. Inclusion criteria were: presence of a single infection by R falciparum with a parasite count > or =4000 infected red cells/mm3. The susceptibility to drugs was measured after an incubation period of 48 hours at 37 degrees C, under 5% CO2. (3H) Hypoxanthine was added to the medium to monitor parasite growth. 134 isolates of P. falciparum were tested against chloroquine; 24.6% (33/134) were resistant. We have also documented 11.2% (15/133) of resistant isolates to halofantrine. All the tested isolates were susceptible to quinine (n=135) and mefloquine (n=136). A significant positive correlation was found between the following IC50 values: chloroquine-quinine, quinine-mefloquine and mefloquine-halofantrine. Our study shows no significant increase of the prevalence of chloroquine-resistant strains of P. falciparum in our study area; as well as the persistence of resistance to halofantrine with regard to previous publications in the subject.


Assuntos
Antimaláricos/farmacologia , Plasmodium falciparum/efeitos dos fármacos , Adolescente , Animais , Burkina Faso , Criança , Pré-Escolar , Humanos , Lactente , Testes de Sensibilidade Parasitária , Plasmodium falciparum/isolamento & purificação
19.
Bull Soc Pathol Exot ; 83(2): 217-27, 1990.
Artigo em Francês | MEDLINE | ID: mdl-2119897

RESUMO

The vaccine (NANP)3-TT is a synthetic peptide of the circumsporozoite protein (CS) of Plasmodium falciparum coupled to tetanus toxoid (TT) as protein carrier and adsorbed to aluminium hydroxide as adjuvant. The objectives of the study were to assess the immunogenicity and the protective efficacy of the vaccine in an area where malaria is endemic. The study was conducted in a zone of irrigated rice cultivation known as the Vallée du Kou to the North of Bobo-Dioulasso. Malaria transmission is permanent in the Vallée with maxima in July and November. The study was conducted from June to December 1988. It was a controlled randomised, double blind, prospective vaccine trial. A total of 123 infants from 3 to 5 months of age were randomly assigned to three groups. Group I (controls) received three doses of TT alone, group II received two doses of TT and one of (NANP)3-TT and group III received three doses of (NANP)3-TT. These vaccines were administered simultaneously with the Enlarged Program of Immunisation (EPI) vaccines. The clinical parasitological and immunological status of the children was then monitored over a period of five months. No systemic reactions to the vaccine were observed in the infants either immediately after administration or during the follow-up. Minor local tumefactions were observed in only 3% of the children. The vaccine was found to be immunogenic with a peak IgG response at day 75, when 56% (group II) and 60% (group III) showed antibody titres of at least four times that seen at day 0. The response, however, was a short duration; by day 150 the average antibody titres were not significantly different between the three groups. The incidence and the level of parasiaemia and the incidence of clinical malaria were also not significantly different for each of the three groups during the period of the study. The association of (NANP)3 with tetanus toxoid was not shown to be immunologically inhibitive. The results, despite not showing a protective effect for the vaccine (NANP)3-TT, have shown its immunogenicity and therefore suggest that further development of this vaccine may be worthwhile.


Assuntos
Malária/prevenção & controle , Plasmodium/imunologia , Proteínas de Protozoários/uso terapêutico , Toxoide Tetânico/uso terapêutico , Vacinação , Animais , Apicomplexa/imunologia , Burkina Faso , Criança , Método Duplo-Cego , Humanos , Malária/parasitologia
20.
Bull Soc Pathol Exot ; 94(1): 52-5, 2001 Mar.
Artigo em Francês | MEDLINE | ID: mdl-11346985

RESUMO

Since 1996, there have been reports of cases of cutaneous leishmaniasis in the town of Ouagadougou. The incidence has been on the rise but precise figures are not known. The object of the present study has been, first, to record cases of cutaneous leishmaniasis having occurred in private and public health centres in Ouagadougou from 1996 to 1998 and, second, to determine the progression of the disease in space and time. We wished also to confirm clinical cases in 1998 by parasitological examination, identify different clinical forms of the disease and map out cases in the town. We carried out a retrospective study from 1996 to 1998 and a prospective study in 1998. All cases recorded in this period in visited health centres were included. A total of 1845 cases of cutaneous leishmaniasis was identified, 50.3% of whom concerned women. The age of patients varied between 1 and 79 years for 356 patients, with a mean age of 26.7 years. Cases increased between 1996 and 1998 (1996 = 61 cases, 1997 = 552 cases, 1998 = 1218 cases). The months of highest incidence were August (13%), September (15%) and October (17%). Peripheral districts (28, 30, 29, 16, 15) in south-eastern areas of the town were the worst touched with 87% of cases. On average, patients seek care after 2 months of progression of the disease. The ulcero-crusted form (68.2%) was the most frequent clinical form observed for 327 patients, but almost half of the cases had more than one site of infection, (43.5%). Over half of the patients presented fewer than 10 lesions with an average of 6. The most common locations were on uncovered parts of the body, notably the superior (53%) and inferior limbs (49%). The parasite could be tested for by smear on 52 patients only in 1998 and 53.8% of cases tested were positive. Leishmania major, which is very prevalent in West Africa was identified in one patient. The vectors and main reservoirs of the parasite were not studied. Case management was generally incomplete; the most commonly prescribed drugs were antibiotics (70% of patients), but self-medication was frequent. Our recommendations after this preliminary study are: undertake multidisciplinary studies on cutaneous leishmaniasis in Ouagadougou in order to understand the local aetiology (vectors responsible for transmission, rodent and domestic animals involved in the epidemiological chain, parasite species); identify all other areas in the country where the disease is highly prevalent provide health care staff with a decisional algorithm and protocol therapy carry out and active control programme for cutaneous leishmaniasis in Burkina Faso.


Assuntos
Leishmaniose Cutânea/epidemiologia , Adolescente , Adulto , Idoso , Animais , Burkina Faso , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Leishmania major/isolamento & purificação , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Cutânea/patologia , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Estações do Ano
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