Lab Personnel

The Urinary Stone Analysis laboratory will be officially ending its urinary stone analysis service on July 31, 2020.  We will no longer be accepting any new submissions for analysis afteJULY 17, 2020.  Please make note of this date as we will not be able to return samples to you if they are received after this date. Click here for more information (pdf)

Jodi Westropp

Jodi L. Westropp DVM, PhD, DACVIM

Dr. Westropp obtained her DVM at The Ohio State University in 1997. She then moved New York City for a one year internship in small animal medicine and surgery at the Animal Medical Center and returned to Ohio State for her internal medicine residency and PhD training. She was board certified in the American College of Veterinary Internal Medicine in 2001 and completed her PhD in 2004. She is currently Professor in the department of Veterinary Medicine and Epidemiology at the University of California, Davis School of Veterinary Medicine. Her primary research focus is lower urinary tract disorders in dogs and cats. She is also the director of the Gerald V. Ling Urinary Stone Analysis Laboratory at UCD and the Director of The Veterinary Medical Continuing Education at UCD.  

For a list of current research projects related to small animal lower urinary tract diseases, please click here.


Ryoji Shiraki

Dr. Ryoji Shiraki PhD

We are pleased that Dr. Shiraki accepted the position of laboratory manager after Ms. Annette Ruby retired this past year.  Dr. Shiraki received his Ph.D. in geology from the University of Tokyo in 1987. Before he joined in the Stone Lab in 2008, he had worked in various research projects in geochemistry and related fields at the University of Tokyo, Pennsylvania State University, University of Wyoming, and University of California at Davis. He is proficient in many instrumental analytical techniques including X-ray diffractometry, infrared spectroscopy, scanning electron and optical microscopy, and electron probe microanalysis, all which are essential in stone analysis.  He is interested in studying the formation of urinary stones from both the mineralogical and chemical viewpoints.