Dogs Needed For Dwarfism Study
A study into chondrodysplasia (dwarfism) in Chesapeake Bay Retrievers is underway at the University of California at Davis Veterinary Medical Teaching Hospital. The study was begun after a litter of seven puppies was whelped; five of which showed some form of dwarfism.
A search has begun to locate other dogs medically diagnosed with dwarfism. Pedigree analysis of the known affected dogs shows some common ancestry among them. However, most of the general population of Chesapeakes also shares common ancestry with these affected dogs; therefore pedigree analysis alone is not sufficient to eliminate the gene from the population. It is hoped that a genetic marker or mutation test can be developed to detect carriers. This study is privately funded, so no ACC funds are needed; however, the researchers are looking for affected dogs in order to help with development of a gene test. Anyone with an affected dog can contact:
Dr. John Switzer formerly coordinated the effort to obtain dogs for this research. A blood sample and copy of the pedigree from affected dogs are what is needed right now. The DNA swab-testing kits are free.
Below are excerpts from a preliminary report sent by Dr. Switzer.
Dr. Switzers brief also included a detailed radiographic description by Paul W Poulos, DVM, PhD, Diplomate of the American College of Veterinary Radiologists. This description is very useful for veterinarians who may wish to do radiographic workups on dwarfism in Chesapeakes or other breeds prone to this form of dwarfism. A copy of Dr. Switzers complete brief is available from Lisa Van Loo.
Please contact Dr. Amy Young directly with information about affected dwarves. Spread the word to non-ACC members, we need as many affected dogs as possible for this research effort.