The raccoon an emerging rabies host

Area of Science:

• Veterinary Medicine
• Epidemiology
• Wildlife Disease

Background:

• Enzootic rabies in raccoons was historically confined to Florida and Georgia.
• The enzootic raccoon rabies area expanded northward into Georgia during the 1960s.
• Raccoon populations living in close proximity to humans present unique public health challenges.

Purpose of the Study:

• To investigate a specific epizootic of raccoon rabies on an offshore island.
• To understand the dynamics of rabies transmission in a semi-domesticated raccoon population.
• To assess human exposure risks during a raccoon rabies outbreak.

Main Methods:

• Field investigation of a raccoon population on an island.
• Laboratory confirmation of rabies in trapped raccoons.
• Behavioral and virological assessment of infected raccoons.

Main Results:

• Forty-seven raccoons tested positive for rabies between January and May 1969.
• Approximately 10% of raccoons were positive during the epizootic peak.
• Rabid raccoons were often asymptomatic but had high salivary virus titers, leading to human exposure through close approach.

Conclusions:

• Close contact between humans and semi-domesticated raccoons can facilitate rabies transmission.
• Asymptomatic rabid raccoons pose a significant risk to human health.
• Raccoon rabies vaccination should be considered as a control method, potentially replacing population reduction.