26.09.2017 19:17:00

New Study Funded by Morris Animal Foundation Points to Unexpected Benefits of Rabies Vaccination in Dogs

DENVER, Sept. 26, 2017 /PRNewswire/ -- The rabies vaccine is extremely effective at preventing this fatal disease in dogs, but new research, funded by Morris Animal Foundation, shows the vaccine may have a positive impact on overall canine health as well, and is associated with a decrease in death from all causes.

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The unexpected finding could have implications for future design of rabies control programs as well as provide a model to study this same effect in humans. Dr. Darryn Knobel, Associate Professor of Epidemiology and Population Health at Ross University School of Veterinary Medicine, recently published his research results in the journal Vaccine.

The study showed that rabies vaccination reduced the risk of death from any cause by 56 percent in dogs 0 to 3 months of age. While all dogs had decreased mortality, the percentage decrease was highest in young dogs, with the effect diminishing over time. Dr. Knobel's study area incorporated an impoverished region of South Africa, where infectious diseases, including rabies, are an ever-present threat to both humans and dogs. The research team concluded that the decrease in mortality couldn't be explained by a reduction in deaths due to rabies alone.

"This led us to propose that rabies vaccine may have a non-specific protective effect in dogs, perhaps through boosting the immune system to provide enhanced defense against other, unrelated diseases," said Dr. Knobel. "A similar phenomenon has been observed in children, although it remains to be substantiated through more definitive trials."

Rabies remains a global health threat with tens of thousands of human deaths every year, mostly in Asia and Africa. Dogs are the main source of human rabies deaths, so rabies control programs are essential to both canine and human health.

Understanding the mechanisms responsible for the enhanced immunity could have broad implications not only for veterinary medicine but also for human medicine. Dr. Knobel hopes to continue his studies in collaboration with veterinary immunologists and infectious disease specialists, to study this effect further in dogs.

"Morris Animal Foundation is proud to support the work of Dr. Knobel in this critically important area of animal and human health," said John Reddington, DVM, PhD, President and CEO of Morris Animal Foundation. "This is a fatal disease shared by dogs and people, and the work we and Dr. Knobel have undertaken has the potential to save both human and canine lives by further exploring the findings of this study."

While great strides have been made in rabies prevention and treatment since 1983, the World Health Organization continues to include rabies on its neglected tropical disease roadmap. As a zoonotic disease (meaning it spreads from animals to people), rabies requires close cross-sectional coordination at the national regional and global levels. Raising awareness about rabies through World Rabies Day, Sept. 28, and other efforts is critical to successful disease management programs.

WHO, with its partners the Food and Agriculture Organization of United Nations (FAO), World Organisation for Animal Health (OIE), and the Global Alliance for Rabies Control, is developing an international action plan to reach zero human deaths from dog-transmitted rabies by 2030. The plan covers policy, human and animal interventions, awareness raising and advocacy, capacity building, and the respective resources needed for elimination of the disease in countries still suffering from rabies. Work such as Dr. Knobel's will have an impact on and inform the work of these organizations.

About Morris Animal Foundation

Established in 1948, Morris Animal Foundation is dedicated to improving and protecting the health of animals through scientific innovation, education and inspiration. Our investment in research has yielded life-saving vaccines, new treatments for critical diseases, superior screening tests, and advanced diagnostic tools. We respond to emerging animal health threats that endanger entire species, and make new discoveries in basic animal biology to support applied research. With every study we fund – more than 2,600 to date – we strive to advance the science of veterinary medicine, honoring the founding principles of Dr. Mark L. Morris Sr., and benefitting animals worldwide.

 

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SOURCE Morris Animal Foundation

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