Local CrewDigital Empathy2024-10-10T11:32:51+00:00

Simply The Best

For you and your pet.

Our Local Crew

Erica Queen, DVM, DACVIM

Internal Medicine

Polina Vishkautsan, DVM, DACVIM

Internal Medicine

William FitzPatrick, DVM, DACVIM

Oncology

Mohammed H. Ibrahim BVSC, DVM

Surgery

Deb Morey, DVM, DACVECC

Emergency & Critical Care Specialist

Peggy McMahon, DVM, DACVECC

Emergency & Critical Care Specialist

April Durtschi, DVM, DACVIM

Cardiology

Nicole Ulhaq, DVM

Emergency

Richard Strasser, DVM

Emergency

Jasmine Choi, DVM

Emergency

Travis Vasconcellos, DVM

Emergency

Stella Chu, DVM, CVA, CCRT

Emergency

Monica Zamora, DVM

Emergency

Courtney Malone, DVM

Emergency

Erica Queen, DVM, DACVIM

Internal Medicine

The U.C. Davis School of Veterinary Medicine is regarded as one of the top three veterinary schools in the world. As a graduate of this distinguished university Dr. Queen was honored as a resident by faculty for her clinical and teaching contributions in 2009. She also received the Small Animal Resident award from the senior students for her contributions to their education in clinical rotation in 2010. Her knowledge and expertise in Small Animal Internal Medicine are equaled only by her generosity to and compassion for all things big and small.

Education

Small Animal Internal Medicine Residency, University of California, Davis, Veterinary Medical Teaching Hospital, July 2010.
DVM, Small Animal Medicine, University of California, Davis, School of Veterinary Medicine, June 2006.
Bachelor of Science, Biological Sciences, University of California, Davis, March 2002.

Areas of Interest
Small animal internal medicine with particular emphasis in the areas of infectious disease, endocrinology, respiratory disease, and hepatic disease.

Research Publications

Jan S. Suchodolski , Mary L. Foster, Muhammad U. Sohail, Christian Leutenegger, Erica V. Queen, Jörg M. Steiner, Stanley L. Marks. The Fecal Microbiome in Cats with Diarrhea. Published: May 19, 2015 DOI: 10.1371/journal.pone.0127378
Johnson, LR, Queen, E, Vernau, W, Sykes, JE, Byrne, B; Microbiologic and cytologic assessment of bronchoalveolar lavage fluid from dogs with lower respiratory tract infection: 105 cases (2001-2011). Journal of Veterinary Internal Medicine.
Queen, EV, Marks, L, Farver, TB. Prevalence of selected bacterial and parastic agents in feces from diarrheic and healthy control cats from Northern California. Journal of Veterinary Internal Medicine. 26 (2012): 54-60.
Queen, EV, Vaughan, MA, Johnson, LR. Brochnoscopic debulking of tracheal carcinoma in 3 cats using a wire snare. Journal of Veterinary Internal Medicine. 24 (2010): 990-993.
Foley, JE, Queen, E, Sacks, B, Foley, P; GIS-facilitated spatial epidemiology of tick-borne diseases in coyotes (Canis latrans) in northern and coastal California. Comparative Immunology, Microbiology & Infectious Diseases. 28 (2005): 197-212.
Center for Comparative Medicine- NIH Summer Research Fellow, 2003: Cytokine Profiling of Northern California Rodent Species.
UC Davis Department of Nutrition: Adipocyte culture to investigate metabolism and hormone production; research relevant to obesity and diabetes mellitus.

Honors & Awards

Dr. Charles E. Cornelius Memorial Scholarship, May 2003
Theodora Peigh Outstanding Achievement Scholarship, May 2004
Salsbury Scholarship for Academic Achievement, May 2005
Phi Zeta Honor Society Member, May 2006
Merck Veterinary Manual Achievement Award, May 2006
Feline Medicine Service Award, May 2006
Chocolate Chip Oliver Scholarship for Small Animal Clinical Proficiency, May 2006
Dr. Jacob Traum Award for Superior Interest and Accomplishment in Microbiology or a Related Subject Area, May 2006
Lagniappe Smith Memorial Award (for clinical and teaching contributions as a resident) 2009
Small Animal Resident Award – awarded by the veterinary class of 2010

Professional Affiliations

American Veterinary Medical Association, 2002-present
California Veterinary Medical Association, 2002-present
American Association of Feline Practitioners, 2004-2006

Polina Vishkautsan, DVM, DACVIM

Internal Medicine

Polina Vishkautsan, DVM, ACVIM, is a board-certified internal medicine specialist at MarQueen Veterinary Specialty Group – Upland, California location.

Dr. Polina obtained her DVM degree in 2001 from the Koret Veterinary School at the Hebrew University of Jerusalem. With a desire to continue her growth and practice some of the best veterinary medicine, she moved to New York to attend the prestigious Cornell Veterinary School of Medicine, where she passed her boards and qualifications to become a veterinarian in the United States.

After a rigorous internship at a 24-hour veterinary emergency and specialty clinic in Wisconsin, she completed a Small Animal Internal Medicine residency at the Angell Animal Medical Center in Boston.

Dr. Polina has since worked at several emergency and specialty hospitals in both Arizona and California. In 2014, she pursued a two-year Fellowship in Small Animal Infectious Diseases at the University of California, Davis, Veterinary Medical Teaching Hospital – rated as one of the best veterinary teaching hospitals in the world. During her fellowship, Dr. Vishkautsan subspecialized in treating both common and rare infectious diseases of dogs and cats and completed a research project on the use of anti-fungal drugs in cats.

Polina enjoys traveling the world in her spare time, pursuing exotic locals for bird photography with her partner Henry. Polina loves to hike, in particular, the Sonora Desert to explore the hidden gems of the beautiful state of Arizona.

Areas of Special Interest

2016- Present: Internal Medicine Specialist – MarQueen Veterinary Specialty Group (current)
2014 – 2016: Fellowship in Small Animal Infectious Diseases, University of California, Davis, CA
2010-2014 Internal Medicine Specialist, Atascadero Pet Center, Atascadero, CA
2010-2012 Internal Medicine Specialist, Sonora Veterinary Specialty, Phoenix, AZ
2008-2010 Internal Medicine Specialist, Arizona Emergency and Referral Center, Mesa, AZ
2006-2007: Internal Medicine Staff Doctor, Angell Animal Medical Center, Boston, MA
2004-2006: Residency in Small Animal Internal Medicine, Angell Animal Medical Center, Boston, MA
2003-2004: Rotating Emergency and Critical Care internship at Animal and Emergency Center, Glendale WI
2001-2002: ECFVG – Cornell University, Ithaca, NY
1997-2001: Doctor of Veterinary Medicine Degree, Koret Veterinary School, The Hebrew University of Jerusalem, Israel
1994-1997: Bachelor of Science, Summa Cum Laude, Major: Animal Sciences, The Faculty of Agriculture, The Hebrew University of Jerusalem, Israel

William FitzPatrick, DVM, DACVIM

Oncology

MarQueen Veterinary Specialty Group includes oncology and is headed by our board-certified veterinary oncologist, William FitzPatrick DVM DACVIM (oncology). Dr. FitzPatrick has been a veterinary small animal veterinary oncologist in the Inland Empire for over a decade, serving Upland, Rancho Cucamonga, Claremont, La Verne, Chino Hills, and surrounding cities in and around San Bernardino and Los Angeles counties. Since childhood, William has had a love for dogs and cats, which eventually led him to work as a veterinary assistant at a veterinary practice during high school in Albuquerque, New Mexico.

Dr. FitzPatrick has an impressive educational background that begins with a Bachelor’s Degree of Science in both Biology and Spanish in his home state at the University of New Mexico. While Willam was at it, he obtained a Masters in Toxicology from UNM College of Pharmacy. This experience led him to study cancer and pharmacologic drug studies in both humans and animals. This collaborative oncology experience would set Dr. FitzPatrick on his journey into becoming a veterinarian and, ultimately, a veterinary oncologist for dogs and cats.

William left New Mexico for Fort Collins, CO, after being accepted into the prestigious Colorado State University School of Veterinary Medicine, where he obtained his degree in veterinary medicine. Dr. FitzPatrick then completed a one-year internship at the New Haven Central Veterinary Hospital in Connecticut. Dr. FitzPatrick first worked as a general practice DVM in routine care, emergency medicine, and surgery. He practiced for five years as a family veterinarian to establish a strong foundation before he embarked on his dream to become a veterinary oncologist.

After completing a three-year veterinary oncology residency program at Michigan State University, Dr. William FitzPatrick DVM passed his veterinary oncology board exam to become Dr. William FitzPatrick DVM DACVIM (oncology) and official dream achiever. Over the next three years, William practiced as a veterinary oncologist at veterinary specialty hospitals in Maryland and Massachusetts before moving his family to California, where he and his wife discovered they once both lived in the same city but had yet to meet. This mutual love of California would eventually bring Dr. FitzPatrick to MarQueen Veterinary Specialty and Emergency – Upland.

As mentioned, Dr. FitzPatrick has a Bachelor’s Degree in Spanish and is fluent in the Spanish language (spoken and written), which helps with our Spanish-speaking community. In addition, growing up in the western part of the United States, William has an affection for Mexico and South America. He has even traveled to Ecuador and the Galapagos Islands, where he experienced the diverse and unique species of plants and animals.

We would be remiss if we did not point out that Dr. FitzPatrick loves all sports, Football in particular, and is a fan of the Buffalo Bills, not because of his first name but because it is his mother’s hometown. Bill wants to point out that he cheers on both the Buffalo Bills and Baltimore Ravens when they play one another – a win-win! During these games, Dr. Fitzgerald is often joined by his dog, Maya, and cat, Lilly.

Dr. FitzPatrick is a member of the American College of Veterinary Internal Medicine and the American Veterinary Medical Association. He is also a member of the Veterinary Cancer Society and a past member of the Rocky Mountain Society of Toxicology. Since his residency program, he has been actively involved in teaching veterinary students and interns, clinical research, and various cancer trials.

MarQueen Veterinary Emergency and Specialty would like to share a few thoughts from past clients about our veterinary oncologist Dr. William FitzPatrick:

Dr. FitzPatrick is the best! Kind. Soft spoken and very caring for my Chow Chow
Dr. FitzPatrick took time to explain all our options and made sure we could make informed decisions. He got us scheduled with the surgeon ASAP. Great experience in trying circumstances.
Dr. FitzPatrick was so supportive and he took the time to explain everything to us and the possible outcome. Barney has been in remission for years and enjoys his new life in Arizona.
Dr. FitzPatrick was so knowledgeable and spent at least an hour outlining my dogs condition and all of our options. I’m so very impressed with the thorough and kind care here.
Dr. FitzPatrick spent a lot of time speaking to us, giving us a detailed overview of chemotherapy and possible outcomes. … an estimate of what the cost would be so that we knew what to expect and could budget for her treatments. Bucky met with Dr. FitzPatrick every two weeks, and then monthly for her treatments. At every appointment, the doctor gave us progress reports and always called to give the results of Bucky’s blood tests. He always called her my “kid” and was so sweet with her.
My dog was diagnosed with Lymphoma at the start of 2022. My vet had referred me to Dr. FitzPatrick, an oncologist. He squeezed me and my baby in the next day and even started treatment the first day of his appointment. The dr. It was amazing, answering any and all of my questions and educating me on all my options for treatment.

Mohammed H. Ibrahim BVSC, DVM

Surgery

Dr. Ibrahim started his veterinary career in Egypt, where he developed a love for all animals as a child. The more his career developed, Dr. Ibrahim realized his interest and ability to perform surgery at a high level of success. In 2018 he decided to pursue his passion and take the required steps to become a board-certified surgeon. After four years, Dr. Ibrahim successfully completed a surgical internship and his surgery residency. He is now eligible to sit for his board exams. Everyone at MarQueen Veterinary Specialty Group is committed to the best in veterinary care while in pursuit of the highest honors in veterinary medicine.

Mohammed loves to ride horses and his Ducati motorcycle to relax and enjoy his time.

Doctor Of Veterinary Medicine (DVM)

Educational Commission for Foreign Veterinary Graduates (ECFVG) North America Veterinary license (NAVLE)
Bachelor of Veterinary Medical Science (BVSc) 2011 – Egypt

Surgical Training And Experience

Small Animal Surgical Residency: Summit Veterinary Referral Center (SVRC), Washington, June 2019 – June 2022
Small Animal Surgical Internship: Animal Surgical Center of Michigan (ASCM), Michigan, May 2018 – June 2019
Internship: Veterinary Specialty Group (VSG), California, 2016 – 2018
Small Animal Surgical Externships:
- VMTH, University of California, Davis, California, October 2015
- VMTH, University of California, Davis, California September 2011

Employment Experience

MarQueen Veterinary Emergency & Specialty Group, Roseville, California: Assistant surgeon, on-call Emergency surgeon, July 2016 – April 2018
Franklin Ranch Pet Hospital in Elk Grove, California: Associate veterinarian, November 2012 – April 2018
Mobile Veterinary Surgical Services (MVSS), California: Assistant Surgeon, 2015 – 2016
Modern Veterinary Clinic, Cairo, Egypt
Advance Care Veterinary Clinic, Cairo, Egypt: Volunteer Veterinarian

Research

Chief of Staff, Senior Associate Veterinarian November 2001 – March 2011.
- Veterinary Serum and Vaccine Research Institute, Cairo, Egypt
Researcher in Veterinary Virology 2001-2002
Increased arthroscopic window of the elbow craniolateral joint recess with paw supination in dogs. Daniel AD, Mohammed HI
Arterial Supply to the Scrotum: A Cadaveric Angiographic Study. Manuscript in progress
Mohammed HI, Daniel AD, Bryden J. Stanley Manuscript published.
- Identification of cutaneous arteries of the perineal and caudal thigh region: a cadaveric study in 12 cats.
Courtney VA., Daniel AD, Mohammed HI.
- Pre-master Research in Veterinary Virology. Manuscript published

State DVM Licensure

Washington State Veterinary License Active since 2019
Michigan State Veterinary License Active since 2018
California State Veterinary License Active since 2012

Professional Training And Continuing Education

QUADAM Online Course
Common Soft Tissue Surgical Procedures in the Dog and Cat 2013
- AO North America Course
Advanced Techniques in Small Animal Fracture Management 2013
- AO North America Course
Principles in Small Animal Fracture Management 2015
- AO North America Course
Masters Course on Advanced Osteotomy in Small Animal 2015
- ARTHREX Vet System course
Canine Stifle Stabilization for the General Practitioner 2016
- IMEX Veterinary Course
23rd Complete Course in ESF (Linear and Hybrid ESF) 2016
- IMEX Veterinary Course
American College of Veterinary Surgeons surgery Summit ACVS surgery Summit lectures
Advanced TPLO Course
Kyon Course
Zurich Cementless Total Hip Replacement Basic Course
Mini Total Hip Replacement
Cupless Partial Hip Replacement
Biomedtrix Course
I-loc Intra medullary Fixator Workshop 2017
- ARTHREX Vet System course
Canine Hind limb Arthroscopy and Stabilization for the Advanced Surgeon 2018
- Colorado State University, College of Veterinary Medicine, and Biomedical Sciences
Multi-Purpose Rigid Endoscopy
Introduction to Small Animal Laparoscopy
Laparoscopic Ovariectomy Course
Advanced Minimally Invasive Surgical Laparoscopy
Biomedtrix Course
Universal Hip Replacement Workshop
CFX Micro & Nano Hip Replacement Workshop
Colorado State University, College of Veterinary Medicine, and Biomedical Sciences 2019:
Advanced Small animal laparoscopy; Advanced Small animal Thoracoscopy
VA3 Education Foundation
Junior Veterinary Residents Course; Joint Surgery 2019
- VA3 Education Foundation
Senior Veterinary Residents Course; Arthroscopy and Joint Surgery 2020
- American College of Veterinary Surgeons
Portosystemic Shunts in Dogs and Cats webinar 2020
- AO North American
Introduction to Minimally Invasive Surgery in Small Animals webinar 2020
- Summit Veterinary Referral Center
Small animal Anesthesia 2021
- American College of Veterinary Surgeons
ACVS Small Animal Residents’ Workshop 2021-2022
- Neurosurgery training at Viticus Center, Oquendo Campus
Introduction to Spinal Surgery 2022
Biomedtrix Course 2022
I-loc Intra medullary Fixator Workshop Universal Hip Replacement Workshop 2022

April Durtschi, DVM, DACVIM

Cardiology

MarQueen Veterinary Specialty Group is proud to partner with board-certified cardiologist April Durtschi, DVM DACVIM (cardiology). Dr. Durtschi is so passionate about her practice, her patients, and her clients that she has opened her schedule to MarQueen Pet Emergency and Specialty and provides veterinary cardiology consults, echocardiograms for dogs and cats (veterinary cardiac ultrasound), and treatment for cardiac disease in dogs and cats to Upland, Rancho Cucamonga, La Verne, Claremont, San Dimas, and all areas of the Inland Empire. In other words, Dr. Durtschi provides cardiology care for dogs and cats in the area so clients can avoid the stress their dogs and cats would otherwise need to endure with travel.

With some of California’s best veterinary emergency and specialty care, MarQueen Veterinary ER and Specialty Group have raised the bar by including dog and cat cardiologist Dr. Aprial Durtschi. The impressive road in her education and clinical practice cannot be overstated.

A lifetime of love for dogs and cats, April Durtschi obtained her veterinary medical degree from the prestigious Colorado State University. April then went to New York City and completed a one-year internship at the equally prestigious Animal Medical Center in Manhattan. Dr. April Durtschi then moved across the country to experience and practice 24-hour veterinary care, where MarQueen Pet Emergency founded their original hospital in Sacramento, California. It was there that April decided to pursue a path in veterinary cardiology. As a base, Dr. Durtschi completed a fellowship in comparative cardiovascular science at the University of Missouri. With this solid base, Dr. April Durtschi completed her cardiology residency at the University of Tennessee and passed the rigorous process to become a board-certified veterinary cardiologist.

April Durtschi, DVM DACVIM (cardiology), practiced cardiology for dogs and cats in New York, Connecticut, and Washinton before returning to California. Dr. Durtschi is especially interested in the medical management of chronic heart disease and works hard to set individual treatments for each dog and cat of every family. What is best and what makes sense is the ultimate goal of Dr. Durtschi at MarQueen Pet Emergency and Specialty.

Dr. April Durtschi can meet with clients and their dogs and cats by appointment at MarQueen Veterinary Specialty Group, located at 1582 N. Benson Ave, Upland, CA, and can be contacted at 909-303-1700.

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Simply The Best

For you and your pet.

Our Local Crew

Erica Queen, DVM, DACVIM

Polina Vishkautsan, DVM, DACVIM

William FitzPatrick, DVM, DACVIM

Mohammed H. Ibrahim BVSC, DVM

Deb Morey, DVM, DACVECC

Peggy McMahon, DVM, DACVECC

April Durtschi, DVM, DACVIM

Nicole Ulhaq, DVM

Richard Strasser, DVM

Jasmine Choi, DVM

Travis Vasconcellos, DVM

Stella Chu, DVM, CVA, CCRT

Monica Zamora, DVM

Courtney Malone, DVM

Erica Queen, DVM, DACVIM

Internal Medicine

Polina Vishkautsan, DVM, DACVIM

Internal Medicine

William FitzPatrick, DVM, DACVIM

Oncology

Mohammed H. Ibrahim BVSC, DVM

Surgery

Deb Morey, DVM, DACVECC

Emergency & Critical Care Specialist

Peggy Mcmahon, DVM, DACVECC

Emergency & Critical Care Specialist

April Durtschi, DVM, DACVIM

Cardiology

Nicole Ulhaq, DVM

Emergency

Richard Strasser, DVM

Emergency

Jasmine Choi, DVM

Emergency

Travis Vasconcellos, DVM

Emergency

Stella Chu, DVM, CVA, CCRT

Emergency

Monica Zamora, DVM

Courtney Malone, DVM