Increased risk of Marburg virus transmission
Location: Queen Elizabeth National Park, Uganda
Risk level: 🔴 High (localized exposure in a high biological risk environment)
A recent study published in Current Biology has documented a high level of interaction between humans, wildlife, and Egyptian fruit bats (Rousettus aegyptiacus) in the well-known Python Cave, a site previously associated with Marburg virus outbreaks.
Over a four-month period, camera traps recorded:
- More than 200 people (tourists, students, and visitors)
- Interaction with at least 10 animal species
- Continuous presence of bats, recognized reservoirs of the virus
Despite health warnings and measures implemented since 2011, direct human exposure remains frequent, often without any protective measures.
Epidemiological risk
The cave represents a high-risk zoonotic ecosystem, characterized by:
- High density of bats carrying the Marburg virus
- Presence of potential intermediate hosts, including:
- African leopard
- Spotted hyena
- Blue monkey
- Crowned eagle
- Nile monitor lizard
These species may act as indirect vectors, expanding potential transmission pathways.
Key data
- Up to 43% of historical Marburg outbreaks are associated with cave visits
- Documented cases in tourists following exposure in this cave (2007–2008), including at least one fatality
- Bat migration between caves → risk of regional spread
Recommendations
For travelers:
❌ Avoid visiting caves with bat colonies
❌ Do not approach within 30 meters of cave entrances
✅ Use respiratory protection if exposure is unavoidable
✅ Avoid contact with wildlife or contaminated surfaces
For authorities:
- Strengthen signage and access control
- Implement active surveillance in high-risk tourist areas
- Promote health education for visitors and guides
Python Cave represents an active epidemiological hotspot where key drivers of zoonotic disease emergence converge. Ongoing human exposure, combined with the ecological complexity of the site, maintains a significant risk of Marburg virus transmission.
