What Ticks Are Hiding: A Genetic Map of Their Germs and Diseases

This study presents a large-scale hologenomic analysis of microbial diversity across 48 tick species collected throughout China. Using both long- and short-read sequencing on 1,479 samples, the researchers reconstructed 7,783 bacterial genomes of varying quality. This extensive dataset revealed a largely unexplored microbial landscape, identifying numerous previously uncharacterized species with potential pathogenicity.The analysis defined five distinct microbial ecotypes, showing that their composition is strongly shaped by ecogeographic factors and host association. Moreover, the results linked specific tick genetic variants to the abundance of carried pathogens, influencing key biological functions such as hematophagy.Overall, this work provides a crucial resource for studying host–pathogen–microbiome interactions and for developing improved strategies to control tick-borne diseases.https://doi.org/10.1038/s41564-025-02119-z