Pathobiology Graduate Program Faculty


  • Distinguished Professor of Molecular Immunology


Areas of Expertise:
  • Host resistance to infection
  • Immune-mediated diseases: multiple sclerosis, and inflammatory bowel disease
  • T cells
  • Gastrointestinal microbiota; Gnotobiotics
  • Vitamins A & D regulation of immune function
  • Edible mushrooms
  • Selenium
Regulation of the immune system by vitamin D
  • Professor of Molecular Toxicology and Carcinogenesis
  • Associate Chair, Molecular Cellular and Integrative Biosciences Graduate Program


Molecular mechanisms of tumor progression
  • Professor of Immunology
  • Immunology and Infectious Disease Undergraduate Advisor


Areas of Expertise:
  • Regulation of innate immunity, hematopoiesis and cellular transformation by receptor tyrosine kinases.
Immune signaling mediated by receptor tyrosine kinases
  • Director, Animal Diagnostic Laboratory
  • Professor, Veterinary and Biomedical Sciences


Areas of Expertise:
  • Diagnostic Microbiology
  • Veterinary Public Health
  • Food Safety
  • Epidemiology
  • New and Emerging Infectious Diseases
Understanding the molecular epidemiology of foodborne pathogens.
  • Clinical Professor
  • Veterinary Microbiologist
  • Section Head, Microbiology Section, Animal Diagnostic Laboratory (ADL)


Areas of Expertise:
  • Pathogenesis of bacterial diseases and emergence of antimicrobial resistance in bacteria.
Bacterial pathogenesis and emergence of antibiotic resistance
  • Professor, Veterinary and Biomedical Sciences
  • Director, Animal Resource Program


Areas of Expertise:
  • comparative medicine
  • animal models
  • infectious disease and biocontainment
  • rodent pathology
  • animal behavior
  • laboratory animal resource management
  • veterinary medicine
Identification and characterization of bacterial virulence factors involved in colonization of the host and mucosal immune responses
  • Professor of Veterinary and Biomedical Sciences
  • H. Thomas and Dorothy Willits Hallowell Chair
  • Fellow, Academy of Toxicological Sciences


Areas of Expertise:
  • Molecular Toxicology
  • Nuclear Receptors
  • Gene Regulation
Molecular biology of mammalian biotransformation
  • Associate Professor of Molecular Toxicology
  • Associate Professor of Biochemistry & Molecular Biology


Areas of Expertise:
  • Metabolomics
  • Microbiome
  • Drug Metabolism
  • Metabolism
  • Environmental Contaminants
  • Professor of Veterinary and Biomedical Sciences


Areas of Expertise:
  • Hematology
  • Erythropoiesis
  • Anemia Research
  • Leukemia
Genetic and biochemical analysis of cell signaling during hematopoiesis
  • Interim Department Head
  • John T. and Paige S. Smith Professor in Agricultural Sciences


Areas of Expertise:
  • microbiome
  • aryl hydrocarbon receptor
  • dioxin
  • drug metabolism
  • toxicology
  • transcriptional regulation
Dioxin-mediated signal transduction; physiological role of the Ah receptor
  • Distinguished Professor of Molecular Toxicology & Carcinogenesis
  • Deputy Director, The Penn State Cancer Institute


Areas of Expertise:
  • Molecular toxicology and carcinogenesis
  • Nuclear receptors
  • Peroxisome proliferator-activated receptors
  • Cancer
  • Lipid metabolism
Biological roles of peroxisome-activated receptors in toxicology, carcinogenesis, and homeostasis
  • Professor of Immunology and Molecular Toxicology
  • Co-Leader, Mechanisms of Carcinogenesis Program, Penn State Cancer Institute


Areas of Expertise:
  • Micronutrient Selenium, Selenoproteins, and Redox Homeostasis
  • Macrophage Biology
  • Pathways of Inflammation and Resolution (wound healing)
  • Cancer (Leukemia) and Leukemia Stem Cells
  • Redox Regulation of Erythropoiesis During Inflammation
  • The Role of Selenoproteins in Gut Inflammation
  • Bioactive Lipid Mediators- Prostaglandins & Leukotrienes
Regulation of immune function by oxidative stress and antioxidants including selenium
  • Professor of Molecular Virology
  • Director, Pathobiology Graduate Program


Areas of Expertise:
  • Virology
  • Infectious Disease
  • Viral Budding
  • Cellular Trafficking
  • Virus-like Particles
  • Zoonoses
Assembly and budding of paramyxovirus particles.
  • Clinical Assistant Professor
  • Avian Pathologist and Outreach Veterinarian


Areas of Expertise:
  • - Avian reoviruses pathogenensis and immune response.
  • - Poultry/Veterinary diagnostic pathology.
  • - Experimental animal models development and lesion scoring.
  • - Diagnostic technology development.
  • - Sequencing technologies/Next generation sequencing.
  • - Vaccine development and evaluation trials.
  • Extension Veterinarian
  • Professor of Veterinary Science


Areas of Expertise:
  • Ruminant nutrition
  • Dairy herd health
  • Metabolic disease
  • Reproduction
  • Nutrition reproduction interactions
  • Small ruminants
  • Llamas and Alpacas
Mineral and vitamin metabolism in pregnant animals; nutritional monitoring
  • Professor of Molecular Toxicology
  • Molecular Toxicology Undergraduate Advisor


Areas of Expertise:
  • Toxicology
  • Nuclear receptors
  • Molecular Nutrition
  • Drug Discovery
  • Entrepreneurship and Innovation
Mechanisms of action of hypolipidemic drugs and peroxisome proliferators
  • Professor of Immunology


Areas of Expertise:
  • Immunology
  • Development and function of skin-resident lymphocytes
  • Skin inflammatory disease and infections
  • Intestinal inflammation
Development and function of gamma-delta T cells