Comprehensive catalogs for microbial genes and metagenome-assembled genomes of the swine lower respiratory tract microbiome identify the relationship of microbial species with lung lesions
Li, J.; Huang, F.; Zhou, Y.; Huang, T.; Tong, X.; Zhang, M.; Chen, J.; Zhang, Z.; Du, H.; Liu, Z.; Zhou, M.; Xiahou, Y.; Ai, H.; Chen, C.; Huang, L.
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Understanding the community structure and functional capacity of the lower respiratory tract microbiome is crucial for elucidating its roles in respiratory tract diseases. However, there are few studies about it owing to the difficulty in obtaining microbial samples from the lower respiratory tract. Here we collected 745 microbial samples from the porcine lower respiratory tract by harvesting 675 pigs, and constructed a gene catalog containing 10,337,194 nonredundant genes, of which only 30% could be annotated taxonomically. We obtained 397 metagenome-assembled genomes (MAGs) including 111 MAGs with high-quality. These 397 MAGs were further clustered into 292 species-level genome bins (SGBs), among which 56% SGBs are unknown with current databases. Combining with the lung lesion phenotype, we found that Mycoplasma hyopneumoniae strains and the adhesion-related virulence factors harboring in their genomes were significantly associated with porcine lung lesions, implying the role of adhesion and overgrowth of pathogenic M. hyopneumoniae in host lung diseases. This study provided important resources for the study of porcine lower respiratory tract microbiome and lung health.
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