Comparative genome analysis of multidrug-resistant and susceptible Glaesserella parasuis strains isolated from diseased pigs in China
| Autor: | Wenxuan Gao, He Yan, Guoxia Wang, Chunling Li, Wan Xiulin |
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| Rok vydání: | 2020 |
| Předmět: |
Serotype
China Haemophilus Infections Swine Single-nucleotide polymorphism Biology Serogroup Microbiology Genome Polymorphism Single Nucleotide 03 medical and health sciences Haemophilus parasuis Plasmid Antibiotic resistance Drug Resistance Multiple Bacterial Animals Gene Phylogeny 030304 developmental biology Genetics Swine Diseases 0303 health sciences General Veterinary Virulence 030306 microbiology General Medicine Genomics rpoB Multiple drug resistance Genome Bacterial Plasmids |
| Zdroj: | Veterinary microbiology. 254 |
| ISSN: | 1873-2542 |
| Popis: | Glaesserella parasuis (G. parasuis) is a respiratory pathogen of swine and the etiological agent of Glasser's disease. Although the emergence of multidrug-resistant (MDR) G. parasuis is a critical problem in the swine industry, there are few publications on the genetic basis of antimicrobial resistance of G. parasuis. In this study, comparative genome analyses were used to identify genomic differences between two phenotypically distinct isolates, an MDR isolate (HPS-1) and a susceptible isolate (HPS-2), from diseased swines in China. These isolates were both serovar 4, which is predominant in cases of Glasser's disease and is the most prevalent serovar in China. Based on clusters of orthologous group (COG) annotations, genes assigned to the extracellular structure category were only detected in HPS-1 and genes related to cell motility were more abundant in HPS-1 than in HPS-2. A comparative genomic analysis showed that these two isolates are closely related, although there was a large-scale genomic rearrangement. Eighteen percent of the genome consisted of strain-specific accessory genes of HPS-1. Notably, only the two genes aac(6')-Ie-aph(2'')-Ia and blaROB-1 on a plasmid were specific to HPS-1. We also detected 30,599 single nucleotide polymorphisms (SNPs), including nonsynonymous SNPs in the aminoglycoside resistance gene aph(3'')-Ib, the fusidic acid resistance gene fusA, and the two rifampicin resistance genes rpoC and rpoB in HPS-1. These findings improve our understanding of the differences between MDR and susceptible isolates and will aid the development of treatment strategies to decrease the prevalence and disease burden caused by G. parasuis. |
| Databáze: | OpenAIRE |
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