Guest post by W. Jean Dodds, DVM
Jeannie recently adopted a three-year-old cat from her local shelter. Determined to give her new friend a healthy life, she decided not to have him vaccinated every year. She’d heard that vaccine titers were a good alternative to annual boosters, so she found a veterinarian who offers this option and asked him for more information.
Compelling evidence implicates vaccines in triggering various immune-mediated and other chronic disorders (vaccinosis). In cats, for example, aggressive tumors called fibrosarcomas can occasionally arise at the site of vaccination. While some of these problems have been traced to contaminated or poorly attenuated batches of vaccine that revert to virulence, others apparently reflect a genetic predisposition in an animal to react adversely when given the single (monovalent) or multiple antigen “combo” (polyvalent) products routinely administered to animals. Certain susceptible breeds or families of animal appear to be at increased risk for severe and lingering adverse vaccine reactions.Continue Reading