Metagenomic Profile of Bacterial Communities of <em>Hyalomma scupense</em> and <em>Hyalomma asiaticum</em> Ticks in Kazakhstan

Ticks are important vectors of pathogens affecting humans and animals, posing a serious threat to health. For the first time, we studied the metagenomic profile of the microbial composition of Hyalomma scupense and Hyalomma asiaticum ticks in Kazakhstan. For microbiome analysis, 94 adult H. asiaticum and H. scupense ticks collected from cattle in Kazakhstan in 2023 were randomly selected. 16S rRNA gene sequencing was performed using the Ion Torrent NGS platform. Taxonomic classification carried out in the BV-BRC platform with the Kraken2 database. Metagenomic analysis revealed 26 bacterial genera, including both pathogenic and symbiotic taxa. In H. scupense, the dominant groups were Francisella (89.0%), Staphylococcus (76.0%), and Candidatus Midichloria (61.0%), while in H. asiaticum they were Francisella (99.0% and 95.0%) and Helcococcus (65.0%). In male H. scupense, the proportion of Francisella reached 89%, whereas in females it varied from 2% to 28%. In H. asiaticum, Helcococcus accounted for 65% in males compared to 11% in females. This is the first report on the metagenomic profile of the microbiota of H. scupense and H. asiaticum in Kazakhstan. The detection of pathogens indicates a risk of their transmission to humans and animals and highlights the need to develop new tick control strategies.