G. V. Ling Urinary Stone Analysis Laboratory

Lab Personnel

Photo: Jodi L. Westropp

Jodi L. Westropp DVM, PhD, DACVIM

Dr. Westropp is the director of the G. V. Ling Urinary Stone Analysis Laboratory.  She did her undergraduate work at The Ohio State University and stayed at Ohio State to complete her veterinary degree in 1997.  She then moved NYC for a one year internship in small animal medicine and surgery at the Animal Medical Center and returned to Ohio for her internal medicine residency and PhD. She was board certified in veterinary medicine in 2001 and completed her PhD in 2004. She is currently an associate professor in the Department of 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.  For a list of current research projects related to small animal lower urinary tract diseases, please click here.

Photo: Dr. 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.

Photo: Ms. Annette Ruby

Ms. Annette Ruby BA

Ms. Ruby worked at the University of California Davis for 41 years, the first 8 years in the Microbiology Laboratory at the Veterinary Medical Teaching Hospital, and subsequently, after specialized training at Stanford Medical Center, she started the stone laboratory with Dr. G. V. Ling in 1981.  She was the laboratory manager, and until her retirement in 2009, she performed the crystallographic analyses on the specimens of urinary calculi submitted to the laboratory. She designed and participated in numerous research projects on the mineral composition of urinary calculi from animals and co-authored many peer reviewed manuscripts in this area.  She has recently been rehired on a part-time basis, and provides the lab with 29 years of expertise in the analysis of urinary calculi.

Photo: Ms. Dee Johnson

Ms. Dee Johnson BS

We have been very fortunate to have Ms. Dee Johnson at the University of California Davis for over 41 years; she has been working in the stone laboratory for the past 29.    She brings expertise in the fields of medical microbiology and is currently a staff research associate specializing in processing samples and microbiology.  She is responsible for performing the stone cultures and susceptibility testing and has contributed to numerous research projects and co-authored many peer reviewed manuscripts in this area.

Photo: Ms. Leah Weidinger

Ms. Leah Weidinger

Leah is a UCD undergraduate student who performs database entry, generates laboratory reports from the analysis data, logs in specimens, and performs digital imaging of specimens as needed.  After her graduation in June, 2010, she will continue to work at the stone laboratory and will participate in a research project related to urinary tract infections in cats and dogs.