Genome-resolved metagenomics reveals microbiome diversity across 48 tick species

Ticks are arthropod vectors capable of transmitting a wide spectrum of pathogens affecting humans and animals. However, we have relatively limited information of their genomic characteristics and the diversity of associated microbiomes. Here we used long- and short-read sequencing on 1,479 samples from 48 tick species across eight genera from China to determine their genome and associated pathogens and microbiome. Through de novo assembly, we reconstructed 7,783 bacterial genomes representing 1,373 bacterial species, of which, 712 genomes represented 32 potentially pathogenic species. Computational analysis found nutritional endosymbionts to be prevalent and highly specific to tick genera. The microbiome genome-wide association study revealed host genetic variants linked to pathogen diversity, abundance and key biological pathways essential to tick biology, including blood-feeding and pathogen invasion. These findings provide a resource for studying the host–microbe interactions within ticks, paving the way for strategies to control tick populations and tick-borne diseases. Sequencing the genome and microbiome of about 1,500 tick samples from regions across China revealed host–microbe associations in ticks that could have implications for controlling ticks and tick-borne diseases.