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Faculty Profiles

Todd Bell M.D.

Todd E. Bell, MD

Dr. Bell received undergraduate degrees from Oklahoma State University and an MD degree from the University of Arkansas School of Medicine. Dr. Bell completed his combined residency training in internal medicine and pediatrics at Duke University Medicinal Center where he served as chief resident. Dr. Bell was recognized with the 2004 Golden Apple Teaching Award for the best resident teacher at Duke University Medical Center. At the University of Arkansas he was awarded the Tom Dugan Award for Outstanding Senior in Pediatrics. He joined the faculty at Texas tech in 2006.

Dr. Bell is a member of the American Academy of Pediatrics, the American College of Physicians, the Society of Hospital Medicine, the Infectious Disease Society of America and the International Society for Influenza and Respiratory Viruses. In addition to his research and teaching efforts, Dr. Bell serves as Local Health Authority for the Amarillo Bi-City-County Health District. Dr. Bell's research interests include MRSA epidemiology, influenza, community health, inpatient care and resident and medical student education. He is board certified in internal medicine and pediatrics.

Thomas Hale, Ph.D.

Thomas W. Hale, PhD

Dr. Hale obtained a BS in Pharmacy from Southwestern Oklahoma State University and a  Ph.D. in Pharmacology and Toxicology from the University of Kansas. He is currently a Professor with the Department of Pediatrics and Assistant Research Dean for the Texas Tech University Health Sciences Center in Amarillo.

Dr. Hale is an experienced clinical pharmacologist with many years of lecturing in all areas of pharmacology and therapeutics. His research interests include the use of medications in breastfeeding women, an area where is he is considered an international expert. He has authored four textbooks on this subject.

Michael Melkus, Ph.D

Michael Melkus, PhD

Dr. Melkus received his Bachelor of Science degree in Cell and Molecular Biology and a Master of Microbiolgy degree from Texas Tech University.  He then earned a Ph.D. in Immunology at the University of Texas Southwestern Medical Center at Dallas. His work focused on developing a human immune system in a mouse model to study human tropic infectious diseases, such as HIV. He completed a postdoctoral fellowship developing a Chronic Myeloid Leukemia mouse model using embryonic stem cells at Paul Brousse Hospital, Villejuif, France. Currently, Dr. Melkus is a Research Assistant Professor in the Department of Pediatrics and a member of the Regional Center for Tropical Medicine and Infectious Disease. His research interests include hematopoiesis, immunity to infectious diseases and vaccinology.

Afzal Siddiqui, Ph.D.

Afzal A. Siddiqui, M.Phil., PhD

Dr. Siddiqui received his PhD degree from the University of Western Ontario, London, Canada. He has served as Chief of Parasite Immunology at the East Tennessee State University School of Medicine and has been a Research Health Scientist in the Department of Veterans Affairs. He was a Senior Research Fellow at the Harvard School of Public Health and a Researcher in the Helminthic Disease Branch of the Centers for Disease Control and Prevention. Currently, Dr. Siddiqui is a Professor of Microbiology & Immunology; Internal Medicine and Pathology. He also serves as Vice Chair of Research in Internal Medicine.

Dr. Siddiqui's research emphasis is on vaccine discovery, development and testing for human parasite Schistosoma mansoni, as well as, Strongyloides stercoralis hyperinfection. His research program is funded through the National Institutes of Health and Bill and Melinda Gates Foundation.