Stan Marks, BVSc, PhD
Diplomate, American College of Veterinary Internal Medicine (internal medicine and oncology)
Diplomate American College of Veterinary Nutrition
Professor of Medicine
U.C. Davis
Dr. Marks is a veterinary gastroenterologist and nutritionist who runs the Companion Animal Gastrointestinal Laboratory. Dr. Marks graduated from the University of Pretoria, South Africa, in 1986 and completed an internship in small animal medicine and surgery at the University of Missouri, Columbia in 1987. He completed a small animal residency program at the University of Florida and an oncology residency program at the University of California, Davis. Stan earned his PhD in nutrition from the University of California, Davis. He is currently on staff at U.C. Davis.
His research group have been characterizing enteric bacteria (Clostridial species, Campylobacter, Salmonella) and protozoa (Giardia, Cryptosporidium, Tritrichomonas foetus) associated with diarrhea in dogs and cats, and evaluating diagnostic tests and therapeutic strategies to eradicate the organisms. His group has also studied antimicrobial susceptibilities of Clostridium isolates to commonly utilized antimicrobial drugs, and evaluated the incidence of antimicrobial resistance genes in canine Clostridium perfringens isolates. The GI laboratory is fully equipped for performing aerobic and anaerobic microbiology, parasitology examinations, DNA extraction and purification, PCR, gel electrophoresis, and immunoassays. The laboratory has several ongoing studies evaluating the protozoan, Tritrichomonas foetus, an important cause of bovine infertility and abortion, and a recently characterized cause of chronic diarrhea in cats.
Featured Seminars
Cabo San Lucas, Mexico
Managing common gastro-intestinal problems in practice
December 3 – 5, 2026
Napa, CA
Managing common gastro-intestinal problems
April 16 – 18, 2027
Hiking the Dolomites
July 3 – 11, 2027
Norway & above the Arctic Circle multi-sport adventure
August 31 – September 11, 2027
Providenciales, Turks & Caicos
Managing common gastrointestinal problems in practice today
December 2 – 4, 2027
Postcards from Our Trips
From close to home to destinations abroad, hear what veterinary professionals are saying about their IVS experience.
The speakers were excellent, as were the accommodations. I love coming to IVS Seminars.”
I enjoyed this conference VERY much! The speakers were engaging and superb. I had a surgery day this past Tuesday and have implemented several of their pearls of knowledge!”
The trip was just perfect! My husband and I loved every minute.”
Thank you for a great conference! This was my first IVS experience, and it was great. … I’m hoping to arrange a trip for my vet school friends (11 of us total) in the future.”
I enjoyed the seminar. IVS [is] still the best CE in my opinion. Great venue also.”
Thank you for putting on a fantastic program in Cabo!”
Thank you. I always enjoy the CE experience IVS provides.”
Good to Know Before You Go
Registration is simple. Browse upcoming seminars using the search on our homepage, then click through to the seminar page and complete registration online. You will receive an email confirmation once your registration is complete, and a separate email confirming your payment. Please keep both for your records. You can also call our office at 1-800-487-5650 to register by phone.
IVS holds group space at each seminar venue and handles hotel bookings on your behalf. You can book accommodations at the same time as your seminar registration or separately — whichever you prefer.
On your selected seminar’s page, click the Accommodations tab and scroll down to the Book Accommodations button. Please note: if you need a room outside the standard seminar dates, availability will need to be confirmed with the hotel. Hotel bookings made through our site are not automatic and require some processing time. Once confirmed, you will receive a hotel confirmation letter from IVS by email. All hotels require a credit card to guarantee your booking, and cut-off dates apply — early registration is always advised. Our team is available at 1-800-487-5650, Monday–Friday, 9am–5pm PST.
10% of the registration fee is non-refundable. If you cancel more than 30 days before the seminar start date, you may choose a refund of the remaining 90% or a Future Transfer Credit (FTC). If you cancel within 30 days, only a Future Transfer Credit is issued. The FTC can be applied to any future IVS seminar within 2 years of your cancellation date; it is forfeited if not used within that window. To cancel, you must contact our office and receive email confirmation of your cancellation before the seminar begins. Cancellations requested after the seminar has started, or without email confirmation on file, will forfeit the full registration fee. Please also note that cancellations will remove any Loyalty Program points earned from that registration.
IVS specializes in small group seminars — usually fewer than 80 people per seminar. Most veterinarians appreciate the smaller setting, as it allows for more interaction with speakers and other participants and gives everyone a chance to get their questions answered.
International Veterinary Seminars is an AAVSB RACE-approved provider of CE, which is accepted by all state boards throughout the US and Canada. We are provider #13 and are also an approved provider in New York State. Please contact your state board or our office with any questions. For more information, visit the AAVSB RACE program website.