Ebola Virus Maintenance: If Not (Only) Bats, What Else?

Area of Science:

• Veterinary Epidemiology
• Ecology
• Virology

Background:

• Ebolavirus natural reservoirs and maintenance mechanisms in African forest ecosystems are not fully understood.
• While bats are implicated, the primary bat-maintenance hypothesis lacks definitive confirmation.
• Alternative hypotheses involving non-bat hosts or mixed communities warrant further investigation due to high biodiversity.

Purpose of the Study:

• To review potential hosts and transmission pathways leading to bat exposure and infection with ebolaviruses.
• To identify plausible alternative maintenance hosts and transmission routes, considering bat ecology.
• To provide protocols for prioritizing and investigating these alternative hypotheses.

Main Methods:

• Literature review focusing on bat ecology (roosting, habitat, flight).
• Analysis of potential transmission pathways from other species to bats.
• Evaluation of hypotheses based on known ebolavirus epidemiology and bat-virus interactions.

Main Results:

• Despite bats transmitting pathogens widely, limited hosts and pathways facilitate ebolavirus transmission *to* bats.
• Potential alternative maintenance hosts for ebolaviruses are likely among these limited pathways.
• Bat ecology significantly narrows down the list of potential alternative maintenance hosts.

Conclusions:

• Understanding ebolavirus natural history is crucial for public health.
• Investigating alternative maintenance host hypotheses can complement current research on bats.
• Identifying the complete epidemiological cycle is essential for effective control strategies.