Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology | Phone: 847-367-4359 | Fax: 847-247-1869
  • 2017 Northeast Veterinary Pathology Conference

    Featuring case presentations by anatomic and clinical pathology trainees and pathologists, and a guest lecture by Dr. Linden Craig of the University of Tennessee.

  • 2017 Descriptive Pathology Course

    Meet course lecturers, get individual feedback, and mingle with other trainees from around the world!

  • 44th Annual Gross Review Course

    Learn all about gross lesions in domestic, laboratory, and exotic animals.

  • Argentinean Division Seminar

    Dr. Donal O'Toole (second from left) is demonstrating lesions, and Dr. Melissa Macias (second from right) is translating into Spanish at the 10th seminar of the Argentinean Division of the Foundation.

  • Chilean Seminar

    Participants of the 4th Chilean Seminar of the Foundation on the campus of the University of Chile in Santiago de Chile in August 2016.

  • European Symposium

    The European Symposium of the Foundation was held in Bologna, Italy, in September 2016.

  • Northeast Day Seminar

    Janssen R&D (J&J Pharmaceuticals) and the Davis-Thompson sponsored and hosted the Northeast Day Seminar at Spring House, Pennsylvania in September 2016.

  • Zoo Pathology Workshop

    Drs. Bruce Rideout (Co-moderator), Kevin Keel (Keynote speaker), and Dalen Agnew (Co-moderator) at the 2016 Davis-Thompson/AAZV Zoo Pathology Workshop at the AAZV meeting in Atlanta, Georgia.

Most Requested Publications

We are currently having problems with our bookstore, and we are sorry for the inconvenience. Please call the Main Office at 847-367-4359 to place all orders, and they will be shipped immediately. This problem should be resolved within the month.

CE Portal

Course ID: 166024
Title: Fundamentals of Ultrastructure

Length: 02:00:00
Author: Dr. David Fritz, DVM, DACVP (retired)
Description: This 2-hour lecture on the fundamentals of ultrastucture covers the following: a) basic cellular anatomy, b) morphologic changes in degenerating cells, c) microanatomy of cell types in various organ systems, and d) ultrastructure of infectious organisms, and e) ultrastructure of various neoplasms. Dr. Fritz takes a very practical approach to this material, simplifying complex concepts and making ultrastructural description and analysis familiar for pathologists who have not ventured often into this realm.

Noah's Arkive

The Foundation is proud to make Noah's Arkive, a searchable collection of veterinary pathology images, available online at no cost. Special thanks to the University of Georgia for transferring the database and image collection to the Foundation!

Random Image:

CL Davis Diagnostic Exercises

The main goal of these Diagnostic Exercises is to provide interesting cases, focusing on the gross pathological lesions and associated histopathologic or cytologic findings. This material can be of great use for veterinary students, in-training pathologists, and ACVP diplomates alike.

There will be one contribution per month of the year; anyone may contribute. To do so, please contact Dr. Vinicius Carreira at to identify a convenient date for your submission and to receive templates to be used. Spots will be filled out on a first-come first-served basis.

Exercise Thumbnail Answer
Click here for case history Click here for case synopsis

Twitter Feed - @cldavis_vetpath

Facebook Feed - Davis/Thompson Group

Here is a great but unused case from the 2010 WSC submitted by Dr. Nikolaou Georgios at the University of Liverpool (our loss).

A 9-year-old Lipizzaner gelding was presented at the teaching hospital with intermittent ataxia, hindlimb weakness, and on radiological examination a soft tissue opacity cranial to the tuber sacrale, with lysis of L5/6. A biopsy from the mass was submitted and the animal was humanely euthanized after the diagnosis of soft tissue sarcoma was made and was subject to post-mortem examination due to the poor prognosis.

I think the histo images should provide enough information for a good diagnosis here.
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I love going through old kodachromes. From the collection of Bob McCully. This one goes way back, probably to his early days at Onderstepoort. It's black and white, so I won't add it to Noah's, but I couldn't just let it go. Pathogenesis? ... See moreSee less

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Images from an unused 2011 WSC submission from Dr. Vincent Hsaio of The University of IllinoisCollege of Veterinary Medicine. This is from a 5-year-old spayed female DSH.

The cat went missing on 07/08/2011 and was found outside of the house on 07/14/2011. The owner immediately brought her to the Teaching Hospital for emergency and critical care services. The cat was presented with hyperthermia, dehydration, excessive salivation, lymphadenopathy and pancytopenia. Ulcers were noted on the tongue and hard palate.
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Summer is almost upon us, and with summer brings great courses from the Davis-Thompson Foundation.

If you are training for certification in laboratory animal medicine or pathology, the Foundation’s annual Pathology of Laboratory Animals, now in its 61st year, and its companion course focusing on lab animal medicine topics, the Current Lab Animal Science Seminar, now in its 24th year, is a MUST - and if you are already well-established in these specialties, then you’ll want to come by to stay abreast of the most recent developments.

And what a great place to hold a course - the city of Brotherly Love - Philly in the summertime. Catch the lectures, and spend wonderful evenings walking the shaded avenues around the University of Pennsylvania, visiting the wonderful historical sites, museums, and galleries, or watching the Phillies in your off hours.

Registration is available at

And I will see you there! (Along with my son Drew, who is looking forward to touring Philly with his dad.)

Happy summer!
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