Differential nested patterns of Anaplasma marginale and Coxiella-like endosymbiont across Rhipicephalus microplus...

Area of Science:

• Microbiome Ecology
• Vector-Borne Disease Research
• Arthropod-Microbe Interactions

Background:

• Understanding arthropod vector microbiomes is key to disease transmission dynamics.
• Coxiella-like endosymbionts (CLE) and Anaplasma marginale are important tick inhabitants.

Purpose of the Study:

• Investigate the ecological roles of CLE and A. marginale in Rhipicephalus microplus.
• Determine their distribution across tick life stages and impact on microbiome structure.

Main Methods:

• Microbiome analysis across tick developmental stages (larval, nymphal, adult).
• Co-occurrence network analysis to infer microbial interactions.
• In silico manipulation of networks to assess microbial importance.

Main Results:

• CLE exhibited a stable, nested pattern across all tick stages, suggesting co-evolution.
• A. marginale showed variable occurrence but significantly influenced microbiome structure.
• Competitive interactions between CLE and A. marginale were observed in nymphs.
• In silico removal of microbes altered network topology, highlighting their central roles.

Conclusions:

• CLE and A. marginale play significant, distinct ecological roles in the Rhipicephalus microplus microbiome.
• CLE's stable presence may influence A. marginale dynamics and pathogen transmission.
• Findings inform strategies for managing tick-borne diseases.