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Characterization of Bleeding and Laboratory Phenotype in Hemophilia A Carriers: A Cross-Sectional Study in Benin

Open Journal of Blood Diseases 2023年第4期13卷 148-159页

作者： Tatiana Baglo Agbodandé Alban Zohoun Abdel Aziz Ouabi edwige Araba Bienvenu Houssou Romaric Massi Charlotte Orou Guiwa Ludovic Anani dorothée kindé gazard Awa Oumar Touré Fall Hematology Laboratory National Teaching Hospital Hubert KoutoukouMaga of Cotonou Cotonou Benin Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin Hematology Laboratory of The Aristide le Dantec Hospital Dakar Senegal Pharmacy and Odontostomatology Faculty of Medicine Cheikh Anta Diop University of Dakar Dakar Senegal

Background: In Africa, hemophilia is underdiagnosed and carriers have long been considered free from bleeding symptoms. However, recent research has begun to reveal hemostatic abnormalities and bleeding manifestations in carriers of hemophilia A, particularly due to excessive inactivation of normal X chromosomes. Objective: To describe the bleeding symptoms and hemostatic abnormalities in carriers of hemophilia A (HA) in Benin. Methods: This study was conducted as a prospective cross-sectional investigation between April 2021 to March 2022. The study population consisted of identified through pedigrees of persons with hemophilia A being treated in various hospitals in Benin. Data were collected through interviews conducted by trained physician and each carrier underwent a biological workup. Results: A total of 71 hemophilia A carriers were included and 38 of whom were obligatory carriers. Thirty-one carriers (43.7%) reported abnormal bleeding symptoms. Menorrhagia has (71%) being the most important manifestation, followed by bleeding during or after childbirth (45.2%). Among the 71 carriers, 45 were of reproductive age. Of whom 22 (48.8%) had a Higham score exceeding 100. Activated partial thromboplastin time was prolonged in 7 carriers (9.9%). The mean activity factor VIII:C (FVIII:C) levels were 68.8 ± 34.9 IU/dL. The average FVIII:C level in obligatory carriers was 56.9% and among potential carriers, the average FVIII:C level was higher at 80.4%. However twelve female carriers (16.9%) had FVIII:C levels e FVIII:C/FvWAg ratio was below 0.7 in 73.2% of female drivers. Obligatory carriers (p = 0.00003) and FVIII;C/FvWAg ratio = 0.003) were statistically associated with abnormal bleeding symptoms, while blood group O (p = 0.0002) and FVIII/FvWAg ratio = 0.0016) were associated with a higher risk of menorrhagia. Conclusion: In Benin, carriers of haemophilia A present bleeding symptoms and haemostatic abnormalities. Further studies on a larger number of carrie

关键词： Carrriers of Hemophilia A Bleeding Symptoms APTT Factor VIII FVIII:C/FvW:Ag ratio

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Quality Control of Selected Antimalarials Sold in the Illicit Market: An Investigation Conducted in Porto-Novo City (Republic of Benin)

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Advances in Bioscience and Biotechnology 2015年第10期6卷 637-644页

作者： Farid Baba-Moussa Jacob Bonou Hélène Ahouandjinou Tamègnon Victorien Dougnon Lisette Kpavode Nawal Raimi Aurore Ogouyemi-Hounto Idrissou Abdoulaye Fatiou Toukourou Frédéric Loko dorothée kindé-gazard Flore Gangbo Lamine Baba-Moussa National laboratory Control of Quality of Medicines and edible Medical Ministry of Health Cotonou Benin Laboratory of Microbiology and Food Technology Faculty of Sciences and Techniques University of Abomey-Calavi Institute of Applied Biomedical Sciences Champ de Foire Cotonou Benin Research Laboratory in Applied Biology Polytechnic School of Abomey-Calavi University of Abomey-Calavi Cotonou Benin Parasitology and Mycology Laboratory Faculty of Health Sciences University of Abomey-Calavi Cotonou Benin Biochemistry Laboratory Faculty of Health Sciences CNHU-HKM Cotonou Benin Cytogenetics and Human Biology Laboratory ISBA-Champ de Foire Cotonou Benin Laboratory of Biology and Molecular Typing in Microbiology Faculty of Sciences and Techniques University of Abomey-Calavi Cotonou Benin

Malaria is a parasitic disease caused by the bite of female Anopheles mosquito and particularly affects the tropical areas of the world. According to national statistics it is the leading cause of consultations and hospitalizations. Nowadays, despite the surveillance systems for efficient malaria control and access to generic drugs, Benin is witnessing an increased development of illicit drug markets with a large part of the population going towards such markets. However, this is not without adverse impact on the health of individuals, as well as, the economic status of the country. Therefore, the situation needs to be seriously considered by policy makers at various levels, health professionals but also the entire international community in order to thwart this *** the aforementioned situation, the current study was undertaken aiming to perform a quality control of selected antimalarial drugs of the illegal market in Porto-Novo city. Therefore, 40 antimalarial batches were randomly collected in the illicit drug market and submitted to analytical tests such as: macroscopic examination (a visual and critical examination);mass uniformity test;disintegration test;identification test and active ingredients’ content measurement. At the end of the study, the percentages of non-compliance is 97.5%, 5%, 15% and 27.5%, respectively for the content uniformity tests, disintegration, identification and assay. Over-all, 42.5% of noncompliance was recorded. The findings of this study prove that street vended drugs offer no guarantee of good quality and pose a threat to the health of populations. Also, the rate of non-compliance denotes a flaw in the security of the drug distribution system.

关键词： Antimalarial Counterfeit Medicine Quality Control Illicit Market

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Prevalence of Association of Glucose-6-Phosphate Dehydrogenase Deficiency and Sickle Cell Disease at the National Teaching Hospital of Cotonou in Benin

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Open Journal of Blood Diseases 2023年第3期13卷 93-101页

作者： Alban Zohoun Tatiana Baglo-Agbodande Thierry Adje Bienvenu Houssou Romaric Massi Gnon Gourou Orou Guiwa Justin Dèhoumon Josiane Mehou Ludovic Anani Anne Vovor dorothée kinde-gazard Laboratoire d’Hématologie Clinique Universitaire des Maladies du Sang CNHU-HKM Cotonou Benin Faculté des Sciences de la Santé de Cotonou Université d’Abomey Calavi Cotonou Benin Faculté des Sciences de la Santé Université de Lomé Lomé Togo

Background: Glucose-6-phosphate dehydrogenase (G6PD) deficiency and sickle cell disease are common genetic defects of red blood cells that lead to hemolytic anemia. The prevalence of G6PD deficiency in sickle cell patients is unknown in Benin. Objective: This study aimed to determine the prevalence of G6PD deficiency in sickle cell patients at the CNHU-HKM of Cotonou. Methods: This prospective study was conducted from April to November 2022 at the blood-related diseases teaching clinic and included sickle cell patients in the stationary phase. G6PD determination was performed using the enzymatic method on a Mindray BS 200 machine following the Herz method. Hematological parameters were determined using the XT 4000i analyzer and supplemented by a blood smear stained with May Grunwald Giemsa. Data were analyzed using epi Info 3.5.4 software. Results: One hundred and sixty-four sickle cell patients (80 SS homozygotes and 84 SC heterozygotes) in the intercritical phase, with a mean age of 26.30 ± 10.76 years, were included. The prevalence of G6PD deficiency was 9.1% (15 cases found in 7 SS patients and 8 SC patients). In G6PD-deficient patients, the mean concentration of the enzyme was lower in Hb SC heterozygotes than in Hb SS homozygotes: 3.56 IU/g Hb versus 4.98 IU/g Hb. The mean reticulocyte count was 231.43 G/L in the deficient group, compared to 216.32 G/L in the non-deficient group. Conclusion: The preliminary results of our study reveal a high prevalence of G6PD deficiency in sickle cell patients. The impact of this association on hematologic and biological parameters should be evaluated for better management of sickle cell disease.

关键词： Sickle Cell Disease G6PD Deficiency Prevalence Hemogram

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evaluation of the Anti-Salivary IgG Response Specific to Anopheles Vectors of Malaria in Children under Five Seen in Health Care Settings in Areas of Low and High Insecticide Resistance in Southern Benin

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Advances in Infectious Diseases 2023年第2期13卷 269-282页

作者： Tokponnon T. Filémon Ossè Razaki Noukpo Herbert Legba Thibaut Koukpo Zinsou Come Oke Mariam Fassinou Arsène Akakpo evelyne Fassinou Hector Padonou Gil Germain Remoue Franck kinde-gazard dorothée Akogbeto Martin ecole Polytechnique d’Abomey-Calavi Université d’Abomey-Calavi Abomey-Calavi Bénin Centre de Recherche entomologique de Cotonou (CReC) Cotonou Benin Ministry of Health Cotonou Benin Centre Béninois de la Recherche Scientifique et de l’Innovation (CBRSI) Cotonou Bénin ecole de Gestion et d’exploitation des Systèmes d’elevage Université Nationale d’Agriculture Kétou Benin National Malaria Control Programme Cotonou Benin Faculté des Sciences de la Santé de l’Université d’Abomey Calavi Cotonou Benin Institut de Recherche pour le Développement (IRD) Montpellier France

The widespread use of long-lasting insecticidal nets (LLINs) is a major intervention method for malaria control. While coverage of LLINs has increased, there is a need for information on the operational effectiveness of nets deployed in the field in the context of malaria vector resistance to insecticides used for impregnation. The development of specific anti-malarial biomarkers to assess exposure to mosquito bites is an important development in evaluations. The aim of this study was to characterize the human IgG antibody response to Anopheles gSG6-P1 saliva, a salivary peptide antigen previously shown to be a relevant biomarker of human exposure to Anopheles bites, in order to assess the LLINs under field conditions in areas of low and high vector resistance to insecticides. We analyzed data from 240 randomly selected children ( 0.05). Furthermore, the same finding was observed for antibody expression in children whether or not they used LLINs on the day before the survey (p = 0.7724). Similarly, gender and especially age, major factors of variation in the adaptive immune response, did not have a significant effect on IgG expression.

关键词： Case-Controls LLINs Malaria Morbidity Pyrethroids Resistance Antibodies Bite exposure Biomarkers Benin

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evaluation at the Level of Health Facilities, of the Protective efficacy of LLINs in Children under 5 Years Old from Localities of Low and High Resistance of Vectors to Pyrethroid Insecticides in Benin in West Africa

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Advances in Infectious Diseases 2022年第1期12卷 57-73页

作者： Tokponnon Tatchémè Filémon Ossè Razaki Arthur Sovi Wakpo Abel Hounto Ogouyémi Aurore Sissinto Yolande Adechoubou Alioun Houansou Télesphore Oke Mariam kinde-gazard dorothée Massougbodji Achille Akogbeto Martin Centre de Recherche entomologique de Cotonou (CReC) Cotonou Benin Ministry of Health Cotonou Benin Centre Béninois de le Recherche Scientifique et de l’Innovation Cotonou Benin ecole Polytechnique d’Abomey-Calavi Université d’Abomey-Calavi Abomey-Calavi Bénin ecole de Gestion et d’exploitation des systèmes d’élevage Université Nationale d’Agriculture Kétou Benin Faculté des Sciences de la Santé de l’Université d’Abomey Calavi Cotonou Benin National Malaria Control Programme Cotonou Benin World Health Organization Cotonou Benin

Context: The resistance to pyrethroids in malaria vectors continues to grow in Africa and could therefore compromise or reduce substantially the effectiveness of LLINs in preventing malaria. It is therefore of paramount importance to evaluate the protective efficacy of LLINs in children sleeping in areas of vector resistance to insecticides in order to draw lessons for future interventions. This study assesses the effect of the use of LLINs on malaria morbidity in clusters of low and high resistance of vectors to pyrethroids. Methods: This is a cross-sectional case-control study with one control for one case that was conducted in the communes of Kétou, Ifangni, Kétou, and Pobè in the Plateau department of southern Benin. The use of LLINs and malaria morbidity was measured and compared in children from clusters of low and high vector resistance to insecticides. In each commune, 30 cases and 30 controls were recruited for a total of 240 children under 5 years of age from villages with low and high insecticide resistance. Results: According to the localities of origin of the children, of all parents of children surveyed, 169 (70.4%) asserted the children slept under an LLIN the day before they arrived at the health center. This rate represents 70.8% (85 children) among the cases and 70.0% (84 children) among the controls without significant difference (p = 0.8). The use of LLINs the day before the survey, the frequency of their use during the two weeks preceding the day of the survey, their availability at the household level, the use of other tools for protection against mosquito bites are the same in the two groups of children (cases and controls) (p > 0.05) as well in low and high resistance villages. On the other hand, the parasite prevalence, the splenomegaly and the geometric means of the parasite densities, are significantly higher in the cases than in the controls (p Conclusion: The evaluation of epidemiological indicators in children under five years old at th

关键词： Case-Controls LLINs Malaria Morbidity Pyrethroids Resistance Benin

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