New Bolton Center Kennett Square, PA
Emergencies & Appointments:
Ryan Hospital Philadelphia, PA

Diagnostic Laboratory Personnel

Meet our on-site specialized diagnosticians, including specialized and board-certified microbiologists, parasitologists, and board-certified anatomic and clinical pathologists of the Penn Vet Diagnostic Laboratory.

Anatomic Pathology
Dr. Charles Bradley, Penn Vet
Charles Bradley, VMD, DACVP
  • Assistant Professor, Anatomic Pathology
  • Head, Autopsy Service


  • Dermatopathology
  • Companion Animal Microbiomics

Dr. Molly Church, Penn VetMolly Church, VMD, PhD, DACVP
  • Assistant Professor, Anatomic Pathology
  • Manager, Histopathology Laboratory
  • Anatomic Pathology Residency Program Director


  • Neuropathology
  • Oncologic Pathology
Dr. Amy Durham, Penn Vet
Amy C. Durham, VMD, MS, DACVP
  • Professor, Anatomic Pathology
  • Assistant Dean for Education


  • Oncologic pathology 
  • WHO classification system for subtyping lymphomas in companion animals
  • Ocular pathology
Dr. Elizabeth Mauldin, Penn Vet
Elizabeth Mauldin, DVM, DACVP, DACVD
  • Professor, Dermatopathology
  • Academic Head of Penn Vet Laboratory of Pathology & Toxicology
  • Associate Chair, Department of Pathobiology


  • Board-certified in both anatomic pathology and clinical dermatology
  • Skin biopsy service
  • Dermatology clinician
 Katie Mulka

Katie Mulka, DVM, PhD, DACVP

Assistant Professor, Anatomic Pathology


  • Diagnostic Pathology

  • Comparative pathogenesis of viral disease

Dr. Enrico Radaelli, Penn Vet

Enrico Radaelli, DVM, PhD, DECVP

  • Associate Professor, Anatomic Pathology
  • Faculty Director, Comparative Pathology Core


  • Pathobiology of animal models
  • Phenotyping of genetically engineered mouse (GEM) models
  • Comparative pathology
Dr. Charles A. Assenmacher, Penn Vet

Charles-Antoine Assenmacher, DVM, MSc, DACVP

  • Assistant Professor, Comparative Pathology
  • Technical Director, Comparative Pathology Core

Dr. Hayley Amerman, Penn Vet
  • Hayley Amerman, DVM, DACVP
  • Anatomic Pathology Fellow
Clinical Pathology
Dr. Candice Chu, Penn Vet 

Candice Chu, DVM, PhD, DACVP

  • Assistant Professor of Clinical Pathology


  • Quality Control and Quality Assurance
  • Nephrology Research
  • Digital Cytology
 Dr. Martina Piviani, Penn Vet

Martina Piviani, DVM, SPCAA, MSc, DACVP (clinical pathology)

  • Associate Professor, Clinical Pathology
  • Section Chief, Clinical Pathology


  • Cytology and haematopathology;
  • Cytology-histology correlation;
  • Cell pellet immunohistochemistry for the diagnosis of mesothelioma
Dr. Koranda Walsh, Penn Vet Koranda Walsh, VMD, DACVIM, DACVP
  • Assistant Professor, Clinical Pathology


  • Diagnostic Cytopathology
  • Lymphoma Diagnostics
  • Educational Outreach
  • Workplace Communication
Dr. Stephen Cole. Penn Vet
  • Director of Microbiology Laboratory
  • Assistant Professor of Microbiology
  • email:


  • Microbiology


Dr. Dhruv Desai 
  • Dhruv Desai, DVM, MVSc, PhD
  • Resident, Clinical Microbiology 
Dr. Caroline Sobotyk de Oliveira
Caroline Sobotyk, DVM, MSc, PhD
  • Director, Clinical Parasitology Diagnostic Laboratory
  • Assistant Professor of Clinical Parasitology
Diagnostic Laboratories - Residents
Dr. Taylor Chan   
  • Taylor Chan, DVM
  • Resident, Anatomic Pathology
Dr. Nathan Fanzone 
  • Nathan Fanzone, VMD 
  • Resident, Anatomic Pathology
Dr. Giovanni Finesso
  • Giovanni Finesso, DVM
  • Resident, Anatomic Pathology
Dr. Joshua Hargrove   
  • Joshua Hargrove, DVM
  • Resident, Anatomic Pathology
Elinor Willis, VMD, Penn Vet
  • Elinor Willis, VMD, PhD
  • Resident, Anatomic Pathology

Contact Us

All laboratory sections are located within the Ryan Veterinary Hospital of the University of Pennsylvania.
3900 Delancey Street
Philadelphia, PA 19104