African Society for Toxicological Sciences
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Friday, December 15 2017 @ 01:23 AM EST
2014-2016 ASTS Executive Committee Members


Bernard K. Gadagbui, MSc, PhD, ERT, DABT

Global Outreach Manager
Senior Toxicologist, UK/EU Registered
Toxicology Excellence for Risk Assessment (TERA) Center
Department of Environmental Health
University of Cincinnati College of Medicine
160 Panzeca Way | Cincinnati, OH 45267-0056
Email: and
Ph: 513-558-7943
Sakina Eltom, D.V.M, Ph.D.

Tel/Fax:(615) 327 7313

Hilary Afeseh, Ph.D.
General Secretary

Custodio V Muianga, Ph.D., MPH
Publicity Secretary


Michael Dourson, Ph.D., DABT, ATS


Toxicology Excellence for Risk Assessment

Department of Envitonmental Health

University of Cincinnati College of Medicine

160 Panzeca Way | Cincinnati, OH 45267-0056

Ph: 513-558-7949

Sanmi Areola, Ph.D.

Metro Public Health Department
Nashville, TN
Abdel-Razak M Kadry, DVM, PhD, DABT



President: Bernard K. Gadagbui, M.Sc. Ph.D., DABT, ERT and
Tel.: (513) 542-7475 ext 27
Fax: (513) 542-7587

Bernard Gadagbui holds a Ph. D. in Environmental Health and Toxicology, a M. Sc. in Biochemistry from the University of Bergen, Norway, and B. Sc. (Hons.) in Biochemistry with Chemistry from the University of Ghana. Dr. Gadagbui joined the staff at the Toxicology Excellence for Risk Assessment (TERA) in 2004 as a toxicologist after a combined 8-year toxicologist position at the University of Florida and the Bureau of Pesticides of the Florida Department of Agriculture and Consumer Services (FDACS). He has a wealth of research and teaching experience in environmental toxicology, experience in evaluating human health risks posed by chemicals including pesticides and in developing health-related toxicity values for chemicals, and is familiar with state and federal pesticide regulations. Dr. Gadagbui is interested, among others, in the use of mode of action and mechanisms of toxicity of occupational and environmental toxicants and carcinogens in risk assessment.

Dr. Gadagbui is a founding member of ASTS and was the first Publicity Secretary, a position he held for several years. Prior to becoming the Vice President, he has always been active and most often contribute to the smooth running of ASTS from behind the scenes. He was also instrumental in recruiting Dr. Michael Dourson, President of TERA, as one of the advisors of ASTS.

Dr. Gadagbui has also been active in toxicology societies where he has held or currently holds leadership positions. These include: Toxicologists of African Origin (TAO), a Specialty Interest Group of the Society of Toxicology (SOT) (first President, 2008-2009); Ohio Valley SOT (OVSOT) (Councilor), and Ohio Chapter of the Society for Risk Analysis (OSRA) (Secretary).

Dr. Gadagbui has received numerous awards for his work. Most recently, he led a project that received honorable mention in 2010 for the Alice Hamilton award for top risk assessment work at NIOSH. He also led a team of TERA scientists that won the 2010 Risk Reduction Achievement Award from the Alliance for Chemical Safety, a regional professional organization with a mission to promote public understanding and involvement in chemical risk management.

Dr. Gadagbui believes in the noble goal of ASTS to be a leader in promoting the acquisition and utilization of knowledge of toxicological sciences relevant to Africa, transferring this knowledge to the African continent and fellow Africans, and bringing together African and non-African toxicological scientists to dialogue and effectively strategize on how to move toxicological sciences forward on the continent. He pledges to continue the programs instituted and initiatives started by the past Executive Committees, expand membership, vigorously pursue formation of regional or country chapters on the continent, identify and seek solutions to the challenges and needs for our continent, engage scientists, opinion leaders, and stakeholders in environmental and health issues on the continent, and seek necessary funds for all our activities in North America and in Africa. Dr. Gadagbui believes that there is the need to become more visible to the national and international communities and to continue to build a more viable organization. He pledges to work with the Executive Committee to effectively promote the Society.

Treasurer: Sakina Eltom, Ph.D.

Tel/Fax: 615-327-5713


Dr. Sakina Eltom is an Associate Professor at the department of Cancer Biology, Meharry Medical College. She received her Master’s and doctorate degrees in Pharmacology/Toxicology from Cornell University, Ithaca, NY in 1986 and 1990, respectively.

Her Masters research examined the interactive role of dioxin and thyroid hormones in regulating drug metabolizing enzymes in rats and her doctoral work focused on the regulation of neonatal ontogeny of drug metabolizing enzymes in goats. She was a postdoctoral fellow at McArdle laboratory for Cancer Research from 1990-1991, working with Alan Poland on the regulation of dioxin receptor. After a short venture working in an IPO Biotechnology Company in Upstate NY (Paracelsian, Inc.), she returned to academia and did a second postdoctoral training in Molecular Toxicology at the University of Wisconsin Environmental Toxicology Center, Madison Wisconsin from 1994-1996, working with Colin Jefcoate on the regulation of CYP1B1. She was then appointed as an Assistant Scientist in the Department of Pharmacology, University of Wisconsin, Madison, working on the role of Polyaromatic hydrocarbons (PAH) in breast carcinogenesis in Colin Jefcoate's lab. In 2000, Dr. Eltom joined Meharry Medical College as an Assistant Professor where her research interests continued on the role of PAH in breast cancer (mainly in African and African American women).

She has served on several review panels at the NIH, DOD and Philip Morris External Research Program. Dr. Eltom is author of 26 Publications including peer-reviewed articles and is on the Committee on Diversity (2006-2010) of ASPET, and on the Advisory Committee for organizing the National Meetings of the Directors of Graduate Studies in Pharmacology. She has been a member of the SOT since 2004.

General Secretary: Hilary Afeseh, Ph.D.



Hilary Afeseh Ngwa holds a PhD in Toxicology from the laboratory of Dr. Anumantha G Kanthasamy at Iowa State University of Science and Technology. His research interest is in the area of neurotoxicology, focused on understanding what role environmental exposure to metals in their inorganic and nanoparticle forms, particularly manganese and vanadium, plays in the etiopathogenesis of Parkinson's disease. He uses in vitro, ex vivo and in vivo tools in his research. He received a Masters of Applied Science in Toxicology degree from the Royal Melbourne Institute of Technology (RMIT), Melbourne, Australia in 2006 as an IUTOX/NIEHS scholar for developing countries. His Master's thesis research focused on the adverse reactions from ten traditional African pharmacopoeia treatments locally used in Buea, Cameroon. He is an alumnus of the Risk Assessment Summer School organized by the International Union of Toxicologists. Hilary's undergraduate degree was in Environmental Science with a minor in Botany.

He has served in the Graduate and Professional Student Senate and as a graduate student mentor in the interdepartmental toxicology program at Iowa State. He has been a student member of SOT for the past 4years presenting his research at the annual SOT meeting during each of those years. He is also a member of the Toxicologists of African Origin where he has been graduate student representative and the Nanotoxicology specialty section of SOT.

Publicity Secretary: Custodio V Muianga, Ph.D., MPH



Dr. Custodio V. Muianga is a highly motivated environmental and occupational health and safety professional with fifteen years of experience. He has demonstrated expertise in developing and managing successful initiatives leading to improved human health and environmental quality by emphasizing productivity, efficient public health practice, public interaction, research, and teaching.

Dr. Muianga's future plans are to utilize management ability, leadership, technical, scientific and communication skills to advance a career in improving global public environmental health and policy with focus in the prevention of human exposures to airborne, waterborne, and food borne contaminants, and risk assessment/risk management strategies for environmental contaminants in communities and workplaces. He works and communicates well in three languages (English, Portuguese, Xichangana) with people from diverse backgrounds.

Dr. Muianga holds a PhD in Environmental Health with focus on Environmental and Occupational Hygiene from the University of Cincinnati, a Master of Public Health Degree in Environmental Health Sciences (with dual specialties: Industrial Hygiene and Hazardous Substances) from University of Michigan (2005) and Bachelor of Sciences in Chemistry from Eduardo Mondlane University (UEM), Mozambique (1998). He is currently an Environmental and Occupational Health Research Scientist and Consultant with UEM. He is also a postdoctoral trainee with the U.S. EPA Office of Research and Development/ National Center for Environmental Assessment, Cincinnati, Ohio where he conducts human health risk assessment and development of toxicity values for environmental contaminants for the Superfund Program.

During the last eight years, Dr. Muianga led and participated in several environmental and occupational health projects (research, practice and teaching) in Michigan and Ohio in the US; Mozambique in Africa and Europe. Prior activities included working as occupational and environmental health researcher at UEM with Resource Center linking the academy with the government, private sector and non-governmental organizations in Mozambique; also, worked as a Chemical Analyst & Quality Control/Quality Assurance Expert at the National Laboratory for Drugs Quality Control, Ministry of Health, Mozambique for five years. Highlights of these activities include the following: Application, analysis, transfer, innovation and adaptation of environmental and occupational management systems, quality control/Assurance standards, clean production technologies, chemical risk assessment/risk management strategies from developed countries (Germany, Netherlands, Italy, Great Britain, and United States) to developing countries (Mozambique and surrounding countries) or between developing countries (China, India and Brazil to Mozambique). Dr. Muianga has authored various technical reports, peer reviewed papers/journals in Mozambique, US and other parts of the world and is a member of professional organizations including AIHA, NEHA, SOT, ASTS, ICOH, AMOSAPU.

Michael Dourson, Ph.D., DABT, ATS

Advisor - Toxicology Excellence for Risk Assessment (TERA) Center
Toxicology Excellence for Risk Assessment

Department of Envitonmental Health

University of Cincinnati College of Medicine

160 Panzeca Way | Cincinnati, OH 45267-0056

Ph: 513-558-7949


Ph: 513-558-7949

Ph.D., Toxicology, University of Cincinnati (1980)
Diplomate, American Board of Toxicology (1985, 1990, 1995, 2000, 2005)
Fellow, Academy of Toxicological Sciences (2006)

Mike Dourson directs Toxicology Excellence for Risk Assessment (TERA), a nonprofit corporation with a mission to protect public health. TERA develops partnerships among government, industry and other interested groups to address risk assessments of high visibility, such as formaldehyde, perchlorate, chloroform, and soluble nickel, and cooperative ventures such as the Voluntary Children's Chemical Exposure Program (VCCEP), the International Toxicity Estimates for Risk (ITER) database available at the National Library of Medicine’s ToxNet, and the Alliance for Risk Assessment (ARA).

Prior to TERA, Mike worked 15 years for EPA, holding several leadership roles and winning 4 bronze medals for joint efforts on specific key projects, such as the creation of EPA's Integrated Risk Information System (IRIS). In 2003, Mike was selected for the Society of Toxicology's Arnold J. Lehman award for major contributions that improve the scientific basis of risk assessment.

Mike has co-published more than 100 papers on risk assessment methods, use of animal and human data in the assessment of risk, or assessments for specific chemicals. He has also co-authored well over 100 government risk assessment documents, made over 100 invited presentations, and chaired over 100 sessions at scientific meetings and independent peer reviews.

He has been elected to multiple officer positions in the American Board of Toxicology, the Society of Toxicology (SOT), and the Society for Risk Analysis. He is also a media resource specialist in risk assessment for the SOT, member on the editorial board of two journals, and vice chair of the NSF International Health Advisory Board.


Sanmi Areola, Ph.D.

Metro Public Health Department
Nashville, TN 37203


Sanmi Areola, Ph.D., is a toxicologist with Metro Nashville/Davidson County Public Health Department, Tennessee, where he is involved in the development of policies and procedures for domestic preparedness relating to accidental or deliberate release of chemical, biological, radiological, or explosive devices, environmental assessments, pest management, public health assessment, and environmental and public health tracking. He also serves as the director of the Indoor Environment Program in the department.

Dr. Areola received his Ph.D. in Environmental Toxicology from Texas Southern University, Houston, Texas. Prior to his current position, his academic and scholarly work focused on investigating the impact and mechanisms of action of environmental toxicants on man and wildlife. Specifically, his expertise is in studying the mechanisms of action of neuroactive pollutants at environmentally relevant levels such as those related to lead induced behavioral impairments in children using in vivo microdialysis, tetrodes, and schedule-controlled operant conditioning. Before joining Metro Public Health Department, Dr. Areola was a postdoctoral fellow with the Neuroscience Division at Baylor College of Medicine, Houston, Texas, where he worked on projects involving the elucidation of dopaminergic mechanisms of nicotine and cocaine addiction, a neuronal pathway that is also implicated in lead-induced learning and memory impairments and antisocial behaviors in children.

He is currently involved in developing a proactive community assessment and intervention program to reduce the expression of asthma in the community by reducing exposure to indoor pollutants and identifying risk factors in the community. He is routinely involved in public education/outreach activities and has been featured in several local media addressing environmental public health issues of concern in the community.


Abdel-Razak M Kadry, DVM, PhD, DABT


Dr. Abdel-Razak M. Kadry is a senior advisor for Scientific Organizational Development and International Activities at the National Center for Environmental Assessment (NCEA) in the Office of Research and Development (ORD) the United States Environmental protection Agency. His experience in toxicology and risk assessment spans over thirty years and includes academic research, drug safety and efficacy, food safety and environmental risk assessment. For Five years Dr. Kadry worked as the Director of the Integrated Risk Information System (IRIS) at U.S. Environmental Protection Agency. Dr. Kadry joined EPA after serving as the Chief of the Technical Analysis and Evaluation Branch, Risk Assessment Division, Office of Public Health Sciences, Food Safety and Inspection Service, at the U.S. Department of Agriculture (USDA). In addition to his work at USDA, Dr. Kadry spent 12 years as a faculty at the University of Medicine and Dentistry of New Jersey, and has published a large volume of peer reviewed journal articles and book chapters. Dr. Kadry trained large number of graduate students, postdoctoral fellows and other professionals in the United States and several countries on the principles and applications of toxicological research and risk assessments. Dr. Kadry received his Doctor of Veterinary Medicine from Cairo University, Egypt and MS and Ph.D. degrees in toxicology from Zagazig University, Egypt. Certified by both the American Board of Toxicology, and the National Board of Veterinary Medicine, Dr. Kadry is an active member of the Society of Toxicology, Society of Risk Analysis and other professional organizations. He is the past president of the Association of Government Toxicologists.


Past Executive Committee Members and Advisors


Past President: Lilian G. Yengi
Yengi Consulting Service

Lilian Yengi is currently an Associate Director in the Drug Metabolism and Pharmacokinetics (DMPK) department at AstraZeneca Pharmaceuticals, where she heads a group of scientists responsible for conducting in vitro drug metabolism studies to support the discovery and development of anti-cancer and anti-infective drugs. Prior to that, she spent 10 years in the Drug Safety and Metabolism (DSM) department at Wyeth Pharmaceuticals (now part of Pfizer) where she led a team responsible for assay development and conducting in vitro studies to support multiple therapeutic areas. She represented Drug Safety and Metabolism on cross-functional teams, responsible for formulating and implementing DMPK strategies to support clinical development plans through phase 3. She has extensive hands-on experience and expertise in several in DMPK disciplines including drug-drug interactions (induction, inhibition), metabolic stability and reaction phenotyping, as well as pharmacogenomics and toxicogenomics. She has authored several documents for regulatory submissions and preparing responses to regulatory queries.

Lilian obtained a BSc in Biochemistry and Biology from Keele University (UK), a Masters degree in Clinical Biochemistry from Leeds University (UK) and a Ph.D. in Molecular Genetics from Staffordshire University (UK), with Professor RC Strange as adviser. As part of this program, she studied the influence of genetic polymorphisms in cytochrome P450s and GSTs on disease susceptibility, with a particular emphasis on cancer and inflammatory-mediated diseases. She was involved in the identification of novel polymorphisms that, in combination with environmental factors, increased susceptibility to certain cancers such as cervical and skin cancers. She then did a 2-year postgraduate fellowship with Professor Roland Wolf at the Biomedical Research Center, Dundee University (Scotland) where she was involved in setting up pharmacogenomics tools to study individual responses to drug therapy. She has several peer-reviewed publications and is a member of the International Society for the Study of Xenobiotics (ISSX) and the Society of Toxicology.


Edmond E. Creppy

Department of Toxicology and Applied Hygiene
University of Bordeaux 2
146 rue L'o Saignat
33076 Bordeaux (France)
Day Tel. (33)5 57 57 12 17 or (33)5 56 98 66 06
Fax (33)5 56 98 66 85. Evening Tel. (33)5 56 36 70 00 or (33)5 56 45 70 05

Peter Spencer, PhD

Oregon Health & Science University


Peter Spencer, PhD, FRCPath is Director and Senior Scientist of the Center for Research on Occupational and Environmental Toxicology, Interim Director of the Global Health Center, and Professor of Neurology, School of Medicine, Oregon Health & Science University, Portland, Oregon. Spencer received his doctoral degree from the University of London Faculty of Medicine (Pathology), underwent post-doctoral training at the Albert Einstein College of Medicine where, before moving to Oregon, he served as professor of Neuroscience, Neurology, and Pathology, and Director, Institute of Neurotoxicology. Spencer has published more than 375 papers and several books, received national and international awards, prizes and named lectureships in neuroscience, neurotoxicology and toxicology, and has been appointed as an honorary professor at several foreign universities. He is a founding member of, and longstanding Advisor to, the African Society for Toxicological Scientists.



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