Bat rabies--a Gordian knot?

Area of Science:

• Veterinary Virology
• Wildlife Disease Ecology
• Pathogen Reservoir Dynamics

Background:

• Classical rabies is well-understood, but knowledge gaps persist regarding lyssaviruses, particularly in bats.
• European bat lyssaviruses (EBLVs) 1 and 2 present complex host associations and disease dynamics.
• Bats are significant reservoirs for viral pathogens, with unique immunological factors potentially influencing disease transmission.

Purpose of the Study:

• To explore the unresolved questions surrounding European bat lyssavirus epidemiology and pathogenesis.
• To highlight challenges in bat rabies surveillance, including the lack of validated serological methods for bat sera.
• To discuss the role of bat biology, especially immune responses, in viral pathogen reservoir potential.

Main Methods:

• Review of existing experimental studies and field observations on EBLV-1 and EBLV-2.
• Analysis of current serological survey limitations for bat rabies surveillance.
• Discussion of bat-specific immunological factors relevant to viral persistence.

Main Results:

• Conflicting hypotheses exist regarding EBLV virulence and bat susceptibility.
• Current serological tools for classical rabies are often inadequate for bat rabies surveillance.
• The specific clustering of EBLV-1 and EBLV-2 cases with particular bat species requires further investigation.

Conclusions:

• Bat rabies presents a complex challenge, likened to the Gordian knot, with many aspects yet to be fully understood.
• Further research is needed to clarify EBLV host associations, virulence, and effective surveillance strategies.
• Understanding unique bat immunology is crucial for comprehending their role as viral reservoirs.