Jonathan David Dear

Jonathan David Dear

Professor

Medicine & Epidemiology

Office
1 Garrod Dr., Davis, CA 95616

Licenses
Diplomate of the American College of Veterinary Internal Medicine - Small Animal Internal Medicine
Drug Enforcement Agency License
California Veterinary License #17095
USDA Accredited Veterinarian, Category I
Education
2003, BS, Emory University, Atlanta, Georgia
2007, DVM, University of Georgia, Athens, Georgia
2018, M.A.S., University of California, Davis, California
2016, Certificate, University of California Extension, Davis, California
2022, Universitas 21,
Active Research Grants
Principal Investigator, Babesia conradae epidemiology and hosts, (Principal Investigator), Judith McBean Foundation
Principal Investigator, Characterization of copper-associated hepatopathy in Labrador retrievers, (Principal Investigator), Center for Companion Animal Health
Co-Investigator, Effects of Treatment on Biomarker Change in Cats with Feline Interstitial Cystitis, Westropp, J (Principal Investigator), Center for Companion Animal Health
Co-Investigator, Comparison of tracheal wash and bronchoalveolar lavage in dogs & cats with lower respiratory disease, Hulsebosch SE (Principal Investigator), CCAH
Co-Investigator, Carbapenem-resistant Enterobacterales point prevalence survey, Tessa LeCuyer (Principal Investigator), CCAH
Most Recent Five Book Chapters
2023 Dear JD, Barrs VR: Chapter 211, Systemic Aspergillosis and Other Opportunistic Fungal Infections, Infectious Disease section, Ettinger S, Feldman E, Coté E, (ed), Ettinger’s Textbook of Veterinary Internal Medicine, 9th edition, . .
2023 Dear JD: Chapter 197, Systemic Protozoal Diseases, Infectious Disease section, Ettinger S, Feldman E, Coté E, (ed), Ettinger’s Textbook of Veterinary Internal Medicine, 9th edition, . .
2023 Barrs VR, Dear JD: Sino-Nasal and Sino-Orbital Aspergillosis, Infectious Disease Section, Ettinger S, Feldman E, Coté E, (ed), Ettinger’s Textbook of Veterinary Internal Medicine, 9th edition, . .
2023 Dear JD: Chapter 87, Arthrocentesis, Ettinger S, Feldman E, Coté E, (ed), Ettinger’s Textbook of Veterinary Internal Medicine, 9th edition, . .
2023 Dear JD: Chapter 32, Swollen Joints and Joint Pain, Ettinger S, Feldman E, Coté E, (ed), Ettinger’s Textbook of Veterinary Internal Medicine, 9th edition, . .
Research Focus
Small Animal Internal Medicine; Application of diagnostic laparoscopic and other minimally invasive procedures for veterinary patients, Investigation of emerging veterinary infectious diseases within the state of California, blood-borne, lower respiratory and urinary infections of dogs and cats.
Specialty Focus
My specialty focus is small animal internal medicine. My clinical focuses are on infectious, urinary and respiratory diseases of dogs and cats. I am interested in studying naturally occuring disease in these species as a model of disease for humans.
Ten Recent Publications

2025
Jankowski K, Siliezar KA, Knuchell J, Duenas-Ramirez A, Edwards JJ, Dear JD^
One Health Clinic Challenges and Evolution: Increasing Access to Care for People and Pets in a Rural Community in Northern California

2025
Sapienza HP, Westropp JL, Murphy BG, Wiederhold N, Cañete-Gibas C, Dear JD^
Talaromyces boninensis and T. pigmentosus infections in 2 dogs

2025
Ringhofer JR, Hirsch E, Michalak SR, Wiederhold N, Cañete-Gibas C, Dear JD^
Disseminated Scytalidium philadelphianum infection in a Belgian Malinois

2024
Segev G, Chen H, Dear JD, Martinez Lopez B, Pires J, Klumpp D, Schaeffer A, Westropp JL
Evaluation of the Efficacy of A Live E. coli Biotherapeutic Product (ASB E. coli 212) for Treatment of Recurrent Bacterial Cystitis in Dogs

2024
Story BD, Thomasy SM, Randolph MW, Vincek A, Martins B, Mills EP, Dear JD, Johnson EG, Jordan R, Goldschmidt S, Vapniarsky N
Clinical and Immunohistological Manifestations of Suspected Sjogren's Syndrome in a Dog

2024
Dear JD, Hulsebosch SE, Johnson LR
Recognition and Diagnosis of Underlying Disease Processes in Bacterial Pneumonia

2023
Leisewitz A, Mrljak V, Dear JD, Birkenheuer A
The Diverse Pathogenicity of Various Babesia Parasite Species That Infect Dogs

2023
Lee MA, Hulsebosch SE, Affolter VK, Dear JD, Knipe MF, Maggs DJ, Moore BA, Outerbridge CA, Marsilio S
Polyautoimmunity with Polymyositis, Uveitis, and Progressive Cutaneous Depigmentation in a Mixed Breed Dog: A Case Report

2023
Cohen EA, Moeller CM, Dear JD^
Hypoadrenocorticism in a dog following recovery from alpha-amanitin intoxication

2023
Beaudoin AL, Bollig ER, Burgess BA, Cohn LA, Cole SD, Dear JD, Fellman C, Frey E, Goggs R, Johnston A, Kreuder A, KuKanich KS, LeCuyer TE, Menard J, Reagan KL, Sykes JE, Veir JK, Viviano K, Wayne A, Granick JL
Prevalence of antibiotic use for dogs and cats in U.S. veterinary teaching hospitals, August 2020