沙门氏菌
多药耐受
抗生素
微生物学
生物
细菌
持久性(不连续性)
抗生素耐药性
免疫系统
沙门氏菌感染
免疫学
生物膜
遗传学
工程类
岩土工程
作者
Peter W.S. Hill,Ana Laura Moldoveanu,Molly Sargen,Séverin Ronneau,Izabela Glegola-Madejska,Catrin M. Beetham,Robert A. Fisher,Sophie Hélaine
标识
DOI:10.1016/j.chom.2021.10.002
摘要
Tolerance and persistence are superficially similar phenomena by which bacteria survive bactericidal antibiotics. It is assumed that the same physiology underlies survival of individual tolerant and persistent bacteria. However, by comparing tolerance and persistence during Salmonella Typhimurium infection, we reveal that these two phenomena are underpinned by different bacterial physiologies. Multidrug-tolerant mutant Salmonella enter a near-dormant state protected from immune-mediated genotoxic damages. However, the numerous tolerant cells, optimized for survival, lack the capabilities necessary to initiate infection relapse following antibiotic withdrawal. In contrast, persisters retain an active state. This leaves them vulnerable to accumulation of macrophage-induced dsDNA breaks but concurrently confers the versatility to initiate infection relapse if protected by RecA-mediated DNA repair. Accordingly, recurrent, invasive, non-typhoidal Salmonella clinical isolates display hallmarks of persistence rather than tolerance during antibiotic treatment. Our study highlights the complex trade-off that antibiotic-recalcitrant Salmonella balance to act as a reservoir for infection relapse.
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