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
  • 44th Annual Gross Review Course

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

  • 2017 Current Lab Animal Science Seminar / Pathology of Lab Animals Course

    Recognize and interpret conditions which may affect experimental results or alter the health of laboratory animals.

  • Annual Diagnostic Pathology Symposium: Diagnostic Renal Pathology

    Learn about glomerular pathology, glomerular ultrastructure, and pathology of tubulointerstitial disease.

  • Annual Zoo & Wildlife Pathology Workshop

    The theme of this year is fungal diseases.

  • 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.

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: 166797
Title: Pathology of Zoo Animals

Length: 03:00:00
Author: Dr. Bruce Rideout, DVM, DACVP, Ph.D
Description: This 3-hour lecture on the pathology of zoo animals covers the common and not-so common diseases of a wide range of reptilian, amphibian, avian, and mammalian zoo species.

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

New today on Noah, and in Science Daily....from the collection of Jim Carpenter at Angell Memorial. Tissue from a dog.

This is marked valvular endocardiosis (fibromyxomatous degeneration and deformation of the atrioventricular valves) in a dog. This lesion has been around forever, but there is new and exciting work going on with it...

From the July 14th edition of Science Daily:
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New today on Noah - from the collection of Jim Carpenter of Angell Memorial Animal Hospital. Tissue from a dog.

Looking at this Chihuahua - the dome-shaped head, blank stare and protruding tongue - it's easy to come up with "hydrocephalus and open fontanelles." The cranial and parietal bones won't fuse over an enlarged cerebrum.

But did you know that that breed characteristic for a chihuahua is an "apple-shaped" skull, and many have an open central fontanelle - called a "morela" by chihuahua breeders - which cause no problems over a lifetime?

While many vets just look at an oddly shaped head in this breed and say "Obviously it has hydrocephalus", it really takes a neuro exam and a CT scan to make sure. Poking it on top of the head doesn't do it, and it's probably good to know what the chihuahua breeders know.
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NEW today on Noah: From the AFIP Archive.

Tissue from a chicken.

This is diffuse granulomatous and necrotizing nephritis with extensive urate deposition, or renal gout as a condition name.

Gout can be primary, as a result of elevated levels of protein (which is broken down into uric acid and excreted), but in chickens, most of the cases we see are secondary to the kidney's inability to excrete it. Dehydration is a major cause in poultry, as even the best houses have a number of poor doers who can't get to the waterers - old birds, sick birds, crippled birds, or birds that get stuck somewhere. These account for the low background (1%) of birds with gout almost all producers see.

Let's not forget that you can also see gout with any form of renal disease that causes tubular necrosis - this interferes with excretion too - nephrotropic avian coronavirus, amyloid in some exotics like flamingoes, etc.

Enjoy this new picture (at least to Noah) - taken almost 60 years ago. Think of all of the great pathologists that have trained on this image - and now you are one of them!
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