Dr. Souleymane Diallo is a microbiologist, researcher, and Assistant Professor in the Department of Biology, Faculty of Sciences, at the University of Kindia, Republic of Guinea. He holds a PhD in Applied Medical Biology (Microbiology) and serves as Scientific Secretary of the Laboratory for Applied Research in Natural Sciences (LARASCINA) at the University of Kindia.

His research focuses on microbiology, infectious diseases, public health, epidemiology, environmental health, zoonoses, and microbiological risk assessment. His research activities include the investigation of bacterial and viral pathogens, infectious disease transmission, waterborne infections, and community-level health risks. His recent work has addressed hepatitis B virus epidemiology and screening, syphilis prevalence, bacteriological contamination of freshwater and bathing waters, and the circulation of pathogenic microorganisms including Vibrio species in Guinea.

Through his academic teaching, laboratory research, and scientific collaborations, Dr. Diallo contributes to strengthening infectious-disease research, disease surveillance, microbiological investigation, and public-health knowledge in Guinea. His expertise provides valuable perspectives on emerging infectious diseases, pathogen transmission, laboratory-based surveillance, environmental sources of infection, and prevention strategies, particularly in the context of global and regional public health.

HBSAG SCREENING IN BLOOD DONORS IN THE KINDIA REGION (REPUBLIC OF GUINEA)                                                                                                                                                    

                                                       Hepatitis B is a global public health problem. The objective of this study is to highlight the risk of HBV transmission during blood transfusion. The immunoenzymatic ELISA technique is used to analyze our data. Needle bags, transfusers, Hepatitis B, C and A test sera, hemocue, DTA tubes and others are used. A total of 5086 blood donors on which our study focused, produced 574 positive tests for HBsAg, i.e. 11.29%. Among the (5) five prefectures in the study area, that of Kindia gave the highest number of positive cases (321 or 6.31%). Then come respectively those of Coyah (190 cases or 3.74%), Télimélé (31 cases or 0.61%), Forécariah (28 cases or 0.55%) and Dubréka (4 cases or 0.08). The male sex is the most affected with 351 positive cases or 6.90%, the female sex follows with 223 positive cases or 4.39%. The age group from 23 to 27 years old is the most affected with 133 positive cases or 2.62%. It appears from this study that hepatitis B is a major public health problem in the Republic of Guinea.                                                                                                                                                                                                                                                                                                                                                                                                                 Keywords : HBV, HBsAg, ELISA, transfusion and donors.