Temporal patterns in Ixodes ricinus microbial communities: an insight into tick-borne microbe interactions.

Area of Science:

• Microbiology
• Ecology
• Genomics

Background:

• Ticks transmit significant pathogens, posing risks to human and animal health.
• Understanding tick-borne microbiota dynamics is crucial for disease risk assessment and control strategies.

Purpose of the Study:

• To investigate the temporal dynamics and interactions within the Ixodes ricinus tick microbiota.
• To identify key microbial players and their relationships with environmental factors and pathogens.

Main Methods:

• High-throughput sequencing was employed to analyze tick microbiota composition.
• Monthly sampling over three years allowed for temporal and seasonal variability assessment.
• Statistical analyses, including network reconstruction, were used to understand microbial interactions.

Main Results:

• The Ixodes ricinus microbiota composition varied over time, with recurring patterns.
• Maternally inherited bacteria (Candidatus Midichloria, Rickettsia, Spiroplasma, Arsenophonus, Wolbachia) dominated the microbiota.
• Strong associations were found between specific microbes, including symbionts and pathogens, and the presence of a parasitoid wasp.

Conclusions:

• Marked shifts in tick microbiota dynamics were identified.
• Pathogen presence, such as Rickettsia and Borrelia, can disrupt microbial community interactions.
• Findings offer new avenues for developing tick and tick-borne disease control strategies.