Borrelial Diseases Across Eurasia

Area of Science:

• Veterinary Medicine
• Epidemiology
• Infectious Diseases

Background:

• Borrelioses, caused by Borrelia bacteria, are significant tick-borne diseases.
• The genus Borrelia comprises distinct groups (Lyme, Relapsing Fever, Echidna-Reptile) with varied vectors and hosts.
• Lyme borreliosis (LB) is prevalent in Europe and emerging in Asia, often underdiagnosed.

Purpose of the Study:

• To review the distribution, diversity, and epidemiology of tick-borne borrelioses in Eurasia.
• To analyze the ecological factors influencing disease spread, including tick vectors and hosts.
• To identify needs for improved surveillance and public health strategies.

Main Methods:

• Comprehensive literature review of Borrelia distribution and epidemiology.
• Analysis of ecological dynamics involving tick vectors (Ixodes spp., Ornithodoros spp.) and vertebrate reservoirs.
• Examination of factors like migratory birds and climate change in disease transmission.

Main Results:

• Borrelia species exhibit diverse geographic distributions and transmission cycles across Eurasia.
• Ixodes ticks are primary vectors for LB, while Ornithodoros ticks transmit relapsing fever Borrelia.
• Emerging species like Borrelia miyamotoi and Borrelia turcica are identified.

Conclusions:

• Harmonized surveillance systems are crucial for accurate borreliosis monitoring in Eurasia.
• Enhanced diagnostic tools are needed to improve detection rates, especially in under-reported regions.
• Integrated public health strategies are essential to combat the increasing threat of tick-borne borrelioses.