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Pedro Paulo V. P. Diniz, DVM, PhD

Assistant Professor Small Animal Internal Medicine

College of Veterinary Medicine

E-Mail: diniz@westernu.edu

Phone: (909) 706-3840| Fax: (909) 706-3756
Join year: September 2009


Curriculum Vitae available at: http://goo.gl/JzugX7 (PDF file)

Postdoc in Microbiology, Intracellular Pathogens Research Lab, North Carolina State University, Raleigh, NC, 2009. Mentor: Edward B. Breitschwerdt, DVM, DACVIM

PhD, Clinical Sciences, Sao Paulo State University, College of Veterinary Medicine and Animal Sciences (UNESP – FMVZ), Botucatu, SP, Brazil, 2006. Mentors: Denise S. Schwartz, DVM, MS, PhD and Helio Autran de Morais, DVM, MS, PhD, DACVIM (Internal Medicine, Cardiology)

Residency  in Small Animal Internal Medicine, Sao Paulo State University, College of Agriculture and Veterinary Medicine (UNESP – FCAV), Jaboticabal, SP, Brazil, 2002. Mentor: Aparecido A. Camacho, DVM, MS, PhD.

DVM, Sao Paulo State University, College of Agriculture and Veterinary Medicine (UNESP – FCAV), Jaboticabal, SP, Brazil, 1999.

Education Experience

Veterinary CardiologyNational School of Veterinary (ENVA), Veterinary Cardiology Service, Maison Alfort, Paris, France. Advisor: Dr. Jean-Louis Pouchelon, DVM, PhD, Dipl. ECVIM Cardiology, 1999.


  1. Financial Conflict of Interest Training Program. Western University of Health Sciences, Pomona, CA. 2013
  2. Protecting Human Research Participants. National Institute of Health (NIH), Office of Extramural Research, on-line training. 2011.
  3. Lab Safety. National Institutes of Health (NIH), Division of Occupational Health and Safety. 2010.
  4. Biological Material Shipping. North Carolina State University, Environmental Health & Safety Center, Raleigh, NC. 2007.
  5. Bloodborne Pathogen Exposure Control. North Carolina State University, Environmental Health & Safety Center, Raleigh, NC. 2005.

Professional Experience

Research Associate, Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, NCSU, Raleigh, NC. May – August 2009.

Teaching Experience

Dr. Diniz has performed numerous lectures about tick-borne diseases, molecular methods of diagnosis, and veterinary cardiology in the USA and in Brazil. He currently collaborates with the University of Sao Paulo, Brazil, in a long distance course about design of clinical studies and statistical analysis.  


  • CVM 7510 – CORE Small Animal Internal Medicine
  • CVM 7011 – Small Animal-Mixed Practice II
  • CVM 5120 – Veterinary Basic and Medical Sciences
  • CVM 6120 – Veterinary Basic and Medical Sciences
  • CVM 5160 – Veterinary Clinical Sciences and Skills
  • CVM 6160 – Veterinary Clinical Sciences and Skills
  • CVM 5130 – Molecular and Cellular Biology
  • CVM 6130 – Molecular and Cellular Biology
  • CVM 6140 – Veterinary Issues


Life is a constant problem-based learning experience: learning how to drive; how to use a smart phone; how to raise your kids… These are simple examples of constant challenges to our learning abilities. Veterinary education is also a great challenge, especially in the 21st century. Making learning an engaging and unique experience in the context of our current society is what inspires and motivates me. My enthusiasm is fed and nurtured by the excitement, passion, and extreme dedication of my students. My joy is to see students reaching a truly “Aha!” moment by discovering and combining different pieces of information when I guide them. As a life-long learner, my goal is to expand veterinary education by exploring and merging established and new didactic techniques. Veterinary medicine is a natural PBL experience, where there are no two equal cases. Good veterinarians are defined by their ability to make multiple connections between areas of knowledge, to provide optimal patient care, to have great communicating skills, and to be life-long learners. The skills provided by student-centered learning combine these desired abilities in harmony. Since I joined the WU-CVM I have witnessed the blossom of not only great veterinarians, but also great thinkers and citizens. I strive to participate in this collaborative effort as my contribution to the society and to future generations.

Research Grant

  1. California Department of Public Health. "Detection of Rickettsia species in cat flea populations recovered from stray or feral cats in typhus endemic and non-endemic areas of California". Co-Principal Investigator, 2013-2014. 2,000 (in-kind contribution).
  2. UC Davis Intramural Grant. "Susceptibility of newborn kittens to various Bartonella henselae strains". Center for Companion Animal Health. Co- Investigator. Initial funding: $15,000 for 2013-2014. Renewed on July 2014: $13,550for 2014-2015.
  3. Winn Feline Foundation. "Host immune response of feline kidney cells to pathogenic and non-pathogenic feline coronavirus strains; developing biomarkers for FIP." Co-principal investigator (with Dr. Yvonne Drechsler). $30,000.
  4. Boehringer Ingelheim Vetmedica. "Prevalence of leptospiruria and antibodies against Leptospira spp. in sick dogs in Southern California". Principal Investigator, 2012 - 2013. $27,960.
  5. College of Veterinary Medicine Intramural Grant. "Bartonella in dogs from Peru". Principal investigator, 2011-2012. $5,000.
  6. Western University of Health Sciences Intramural Grant. “Pharmacokinetics of N-Acetylcysteine in Healthy Cats”. Co-principal investigator (with Dr. Jennifer Buur), 2010-2011. $19,000.
  7. Morris Animal Foundation. “Identifying Genetic Determinants Differentiating Feline Coronavirus and Peritonitis Virus Pathotypes”. Co-investigator (with Dr. Yvonne Drechsler), 2010-2012. $108,000.  
  8. Winn Feline Foundation. “Molecular prevalence and viral load of replicating feline coronavirus in the bloodstream of healthy shelter cats in Southern California”. Principal investigator, 2010-2011. $10,000.
  9. Waltham Foundation. “Bartonella spp. bacteremia in canine blood donors”. Co-principal investigator (with Dr. Edward B. Breitschwerdt), 2009-2011. $15,000.
  10. Johns Hopkins University. “Epidemiology of Bartonella sp in Brazilian blood donors and domestic animals”. Co-investigator (with Dr. Diana Scorpio), 2009-2011. $50,000.


2014 Nominated for membership in The Teaching Academy of the Consortium of West Region Colleges of Veterinary Medicine

2013 Awarded the Zoetis Award for Veterinary Research Excellence

2012 Nominated Pfizer Animal Health Distinguished Veterinary Teacher Award

2011 Nominated Pfizer Animal Health Distinguished Veterinary Teacher Award

2010 Nominated Pfizer Animal Award for Research Excellence

2007 Recipient of American Society for RickettsiologyTravel Award


2012 – Present Phi Zeta Veterinary Honor Society

2009 – Present Member of the California Veterinary Medical Association

2009 – Present Member of the International Society for Companion Animal Infectious Diseases

2008 – Present Infectious Disease Special Interest Group. American College of Veterinary Medicine

2006 – Present Member of American Society of Rickettsiology

2002 – Present Vice-leader of Brazilian Research Group of Veterinary Cardiology, CNPq.


  • Chair of the Research Committee. WesternU. 2014  - Present.
  • Member of the Instructional Resources Committee. WesternU - CVM. 2014-Present.
  • Member of the CVM Interprofessional Education Task Force, WesternU CVM, 2014 – Present.


Updated list of citations available at: goo.gl/vkvg7J


Book chapters    

  1. Diniz PPVP. Canine Bartonellosis. In: Bonagura JD (Ed). Kirk’s Current Veterinary Therapy. XV edition, Elsevier, p.1261-1267, 2013.
  2. Diniz PPVP, EB Breitschwerdt. Canine Granulocytotropic Anaplasmosis (A. phagocytophilum Infection). Infectious Diseases of the Dog and Cat, edited by Craig Greene. Saunders, 4th edition, Elsevier, p.244-254, 2011.
  3. Diniz PPVP, AJ Birkenheuer. Canine Granulocytic Anaplasmosis. In: Etienne Côté (Ed). Clinical Veterinary Advisor, 2 ed, Elsevier, p.66-68, 2011.
  4. Diniz, PPVP, AJ Birkenheuer. Canine Monocytic Ehrlichiosis. In: Etienne Côté (Ed). Clinical Veterinary Advisor, 2 ed, Elsevier, p.334-336, 2011.


Selected Research Articles

  1. Yancey CB, Hegarty BC, Qurollo BA, Levy MG, Birkenheuer AJ, Weber DJ, Diniz PPVP, Breitschwerdt EB. Regional seroreactivity and vector-borne disease co-exposures in dogs in the United States from 2004 – 2010: utility of canine surveillance. Vector-Borne and Zoonotic Diseases, 14(10):724-732, 2014. (Full text)
  2. Diniz PPVP, Morton BA, Tngrian M, Kachani M, et al. Infection of domestic dogs in Peru by zoonotic Bartonella Species: a cross-sectional prevalence study of 219 asymptomatic dogs. PLoS Neglected Tropical Diseases, Sep 5;7(9):e2393, 2013. (Abstract) (Full text).
  3. Morton B, Diniz PPVP. Detection of Bartonella quintana from human and feline whole blood by single-tube PCR without DNA extraction. Microbiology Discovery, 1, 7, 2013. (Full text).
  4. Vera CP, PPVP Diniz, Pultorak EL, Maggi RG, Breitschwerdt EB. An unmatched case controlled study of clinicopathologic abnormalities in dogs with Bartonella infection. Comparative Immunology, Microbiology & Infectious Diseases, 36(5):481-7, 2013. (Abstract) (Full text).
  5. Buur J, Diniz PPVP, Roderick K, KuKanich B, Tegzes J. Pharmacokinetics of N-Acetylcysteine after oral and intravenous administration to healthy cats. American Journal of Veterinary Research, 74(2):290-293, 2013. (Abstract) (Full text)
  6. Chomel BB, McMillan-Cole AC, Kasten RW, Stuckey MJ, Sato S, Maruyama S, Diniz PPVP,  Breitschwerdt EB. Candidatus Bartonella merieuxii, a potential new zoonotic Bartonella species in canids from Iraq. PLoS Neglected Tropical Diseases, 2012 Sep;6(9):e1843, 1-9. (Abstract) (Full text)
  7. Braga MDOS, Diniz PPVP, André MR, de Bortoli CP, Machado RZ. Molecular characterization of Bartonella species in cats from São Luís, state of Maranhão, Northeastern Brazil. Mem Inst Oswaldo Cruz. 2012 Sep;107(6):772-7. (Abstract) (Full text)
  8. Di Cicco MF, Downey ME, Beeler E, Marr H, Cyrog P, Kidd L, Diniz PPVP, Cohn LA, Birkenheuer AJ.  Re-emergence of Babesia conradae and effective treatment of infected dogs with atovaquone and azithromycin. Veterinary Parasitology, 2012 Jun 8;187(1-2):23-7. (Abstract) (Full text)
  9. Ayllón T, PPVP Diniz, EB Breitschwerdt, A Villaescusa, F Rodríguez-Franco, A Sainz. Vector-borne diseases in client-owned and stray cats from Madrid, Spain. Vector Borne and Zoonotic Diseases Journal, 2012 Feb;12(2):143-50. (Abstract) (Full text)
  10. Drechsler Y, A Alcaraz, FJ Bossong, EW Collisson, PPVP Diniz. Feline coronavirus in multi-cat environments. Veterinary Clinics of North America Small Animal Practice, Nov;41(6):1133-69, 2011. (Abstract) (Full text)
  11. Diniz PPVP, BS Schulz, K Hartmann, EB Breitschwerdt. Candidatus Neoehrlichia mikurensis infection in a dog from Germany. Journal of Clinical Microbiology, 2011 49(5)"2059-2062, 2011 (Abstract) (Full text)
  12. Vieira RFC, AW Biondo, AMS Guimarães, AP Santos, RP Santos, LH Dutra, PPVP Diniz, et al. Ehrlichiosis in Brazil. Brazilian Journal of Veterinary Parasitology, 20(1):1-12, 2011. (Abstract) (Full text)
  13. Pérez C, RG Maggi, PPVP Diniz, EB Breitschwerdt. Molecular and serological diagnosis of Bartonella infection in 61 dogs from the USA. Journal of Veterinary Internal Medicine, Jul-Aug;25(4):805-10, 2011. (Abstract) (Full text)
  14. Ebert M, EB Breitschwerdt, PPVP Diniz, M Beall, R Chandrashekar, B Stillman. Typical and atypical manifestations of Anaplasma phagocytophilum infection in dogs. Journal of American Animal Hospital Association, Nov;47(6):e86-94, 2011. (Abstract) (Full text)
  15. O’Connor TP, Saucier J, Daniluk D, Stillman BA, Krah R, Rikihisa Y, Xiong Q, Yabsley MJ, Adams DS, Diniz PPVP. et al. Development of peptide- and recombinant protein-based assays for detection of Ehrlichia ewingii antibodies in experimentally and naturally-infected dogs. American Journal of Veterinary Research, 71(10): 1195-1200, 2010. (Abstract)
  16. Otranto D, de Caprariis D, Lia RP, Tarallo V, Lorusso V, Testini G,  Dantas-Torres F, Latrofa S., Diniz PPVP et al. Prevention of endemic canine vector-borne diseases using imidacloprid 10% and permethrin 50% in young dogs: A longitudinal field study. Veterinary Parasitology, 172(3-4):323-32, 2010. (Abstract)
  17. Otranto D, Testini G, Dantas-Torres F, Latrofa M, Diniz PPVP, et al. Diagnosis of canine vector-borne diseases in young dogs: a longitudinal study. Journal of Clinical Microbiology, 48(9):3316–3324, 2010. (Abstract) (Full text)
  18. Perez C, Hummel J, Keene B, Maggi R, Diniz PPVP, Breitschwerdt E. Successful treatment of Bartonella henselae endocarditis in a cat. Journal of Feline Medicine & Surgery, 12:483-6,  2010. (Abstract)
  19. Diniz PPVP, MJ Beall, K Omark, R Chandrashekar, D Daniluk, KE CYR, JF Koterski, RG Robbins, P Lalo, BC Hegarty, EB Breitschwerdt. High prevalence of tick-borne pathogens in dogs from an Indian reservation in Northeastern Arizona. Vector Borne and Zoonotic Diseases Journal, 10(2):117-123, 2010. (Abstract)
  20. Mylonakis M, Kritsepi-Konstantinou M, Dumler J, Diniz PPVP, Day M, Siarkou V, et al. Severe hepatitis associated with acute Ehrlichia canis infection in a dog. Journal of Veterinary Internal Medicine, 24(3):633-8, 2010. (Abstract)
  21. Gaunt S, Beall M, Stillman B, Lorentzen L, Diniz PPVP, Chandrashekar R, et al. Experimental infection and co-infection of dogs with Anaplasma platys and Ehrlichia canis: hematologic, serologic and molecular findings. Parasites & Vectors, 3(1):33, 2010. (Abstract) (Full text)
  22. Barber R, Li Q, Diniz PPVP, Porter B, Breitschwerdt EB, Claiborne M, et al. Evaluation of Brain Tissue or Cerebrospinal Fluid with Broadly Reactive Polymerase Chain Reaction for Ehrlichia, Anaplasma, Spotted Fever Group Rickettsia, Bartonella, and Borrelia species in Canine Neurological Diseases (109 Cases). Journal of Veterinary Internal Medicine, 24(2):372-8, 2010. (Abstract)
  23. Sontakke S, MB Cadenas, RG Maggi, PPVP Diniz, EB Breitschwerdt. Clinical and Microbiological Applications of Broad Range 16S rRNA PCR. Journal of Microbiological Methods, 76(3):217-225, 2009. (Abstract)
  24. Hegarty BC, PPVP Diniz, JM Bradley, L Lorentzen, EB Breitschwerdt. Clinical relevance of annual screening using a commercial ELISA (Snap® 3Dx®) for canine ehrlichiosis. Journal of the American Animal Hospital Association, 45(3):118-124, 2009. (Abstract)
  25. Diniz PPVP, M Wood, RG Maggi, et al. Co-isolation of Bartonella henselae and Bartonella vinsonii subsp. berkhoffii from blood, joint and subcutaneous seroma fluids from two naturally infected dogs. Veterinary Microbiology, 138(3-4):368–372, 2009. (Abstract)
  26. Diniz PPVP, SA Billeter, D. Otranto, et al. Molecular documentation of Bartonella spp. infection in dogs from Greece and Italy. Journal of Clinical Microbiology, 47(5):1565-1567, 2009. (Abstract) (Full text)
  27. Cockwill KR, SM Taylor, ECR Snead, R Dickinson, K Cosford, S Malek, PPVP Diniz. Granulocytic anaplasmosis in three dogs from Saskatoon. The Canadian Veterinary Journal, 50(8):835-840, 2009. (Abstract) (Full text)
  28. Cherry, N.A. PPVP Diniz, RG Maggi et al. Isolation or molecular detection of Bartonella henselae and Bartonella vinsonii subsp. berkhoffii from dogs with idiopathic cavitary effusions. Journal of Veterinary Internal Medicine, 23(1):186-189, 2009. (Abstract)
  29. Breitschwerdt E, R Maggi, M Cadenas, PPVP Diniz. A groundhog, a novel Bartonella sequence, and my father's death. Emerging infectious diseases, 15(12):2080, 2009. (Full text)
  30. Billeter SA, PPVP Diniz, JM Battisti, UG Munderloh, EB Breitschwerdt, M Levy. Invasion and replication of Bartonella species within a tick cell line. Experimental and Applied Acarology, 49(3):193-208, 2009. (Abstract)
  31. Diniz PPVP, HSA De Morais, EB Breitschwerdt, DS Schwartz. Serum cardiac troponin I concentration in dogs with ehrlichiosis. Journal of Veterinary Internal Medicine, 22(5):1136-1143, 2008. (Abstract)
  32. Petanides T, M Mylonakis, M Day, M Saridomichelakis, L Leontides, R Mischke, PPVP Diniz, EB Breitschwerdt, M Kritsepi, V Garipidou, C Koutinas, S Lekkas.  Factors associated with the occurrence of epistaxis in natural canine leishmaniosis (Leishmania infantum). Journal of Veterinary Internal Medicine, 22(4): 866-872, 2008. (Abstract)
  33. Beall MJ, R Chandrashekar, MD Eberts, KE Cyr, PPVP Diniz, C Mainville, BC Hegarty, JM Crawford, EB Breitschwerdt. Serological and molecular prevalence of Borrelia burgdorferi, Anaplasma phagocytophilum, and Ehrlichia species in dogs from Minnesota. Vector Borne and Zoonotic Diseases, 8(4)455-464, 2008. (Abstract)
  34. Kidd L, RG Maggi, PPVP Diniz, BC Hegarty, M Tucker, EB Breitschwerdt. Evaluation of conventional and real-time PCR assays for detection and differentiation of Spotted Fever Group Rickettsia in dog blood. Veterinary Microbiology, 129: 294–303, 2008. (Abstract)
  35. Ferreira Velho PEN, V. Pimentel, GMB Del Negro, PPVP Diniz, EB Breitschwerdt. Severe anemia, panserositis and cryptogenic hepatitis in a HIV patient infected with Bartonella henselae. Ultrastructural Pathology, 31:373–377, 2007. (Abstract)
  36. Eddlestone SM, PPVP Diniz, TM Neer, SD Gaunt, R Corstvet, D Cho, G Hosgood, BC Hegarty, EB Breitschwerdt. Doxycycline clearance of experimentally induced chronic Ehrlichia canis infection in dogs. Journal of Veterinary Internal Medicine, 21:1237-1242, 2007. (Abstract)
  37. Cadenas MB, RG Maggi, PPVP Diniz, KT Breitschwerdt, S Sontakke, EB Breitschwerdt. Identification of bacteria from clinical samples using Bartonella alpha-Proteobacteria growth medium. Journal of Microbiological Methods, 71(2):147–155, 2007. (Abstract)
  38. Diniz PPVP, DS Schwartz, HSA De Morais, EB Breitschwerdt. Surveillance for zoonotic vector-borne infections using sick dogs from southeastern Brazil. Journal of Vector Borne and Zoonotic Diseases, 7(4):689-698, 2007. (Abstract)
  39. Diniz PPVP, RG Maggi, DS Schwartz, MB Cadenas, JM Bradley, BC Hegarty, EB Breitschwerdt. Canine bartonellosis: serological and molecular prevalence in Brazil and evidence of co-infection with Bartonella henselae and Bartonella vinsonii subsp. berkhoffii. Veterinary Research, 38:697–710, 2007. (Abstract) (Full text)
  40. Diniz PPVP, DS Schwartz, RC Collicchio-Zuanaze. Cardiac trauma confirmed by cardiac markers in dogs: two case reports. Brazilian Journal of Veterinary and Animal Sciences, 59(1):85-89, 2007. (Abstract) (Full text)
  41. Diniz PPVP, MG Sousa, DG Gerardi, M Tinucci-Costa. Amphetamine poisoning in a dog: case report, literature review and veterinary medical perspectives. Veterinary and Human Toxicology, 45(6):315-317, 2003. (Abstract)