[Yellow fever in Venezuela]

Area of Science:

• Epidemiology
• Veterinary Medicine
• Public Health

Background:

• Yellow fever, a viral hemorrhagic disease, has historically affected Venezuela, with the last urban case in 1918.
• Recent investigations (2003) identified 318 suspected wild yellow fever cases, confirming 31 cases with a 58% mortality rate, primarily in Zulia and Tachira states.
• An epizootic in monkeys with high mortality preceded the human cases, indicating a potential sylvatic cycle reemergence.

Discussion:

• The reemergence of wild yellow fever in Venezuela is analyzed, considering factors such as population displacement, challenging access to remote areas, and the presence of indigenous communities (Bari, Yuepa, Wayúu).
• Border conflicts and high population mobility may facilitate the spread of the yellow fever virus between endemic and susceptible regions.
• The high mortality rate observed in confirmed cases underscores the severity of the current outbreak and the potential for rapid disease progression.

Key Insights:

• Wild yellow fever has resurged in Venezuela, affecting Zulia and Tachira states.
• A significant number of investigated cases showed a high mortality rate.
• Epizootics in monkey populations served as an early warning sign for potential human transmission.

Outlook:

• Continued surveillance of both human and animal populations is crucial for early detection and response.
• Public health strategies should address the specific vulnerabilities associated with displaced populations and indigenous communities.
• Understanding the ecological and social drivers of reemergence is vital for long-term prevention efforts.