Journal
CLINICAL MICROBIOLOGY REVIEWS
Volume 32, Issue 1, Pages -Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/CMR.00088-18
Keywords
Salmonella enterica; bacterial evolution; enteric pathogens; gene regulation; host-pathogen interaction; immunopathogenesis; pathogenicity islands; persistence; virulence
Categories
Funding
- Israel Science Foundation (ISF) [999/14]
- Infect-Era/Chief Scientist Ministry of Health [3-12435]
- joint ISF-Broad Institute program [2616/18]
- German-Israeli Foundation for Scientific Research and Development (GIF) [I-41-416.6-2017]
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The ability of pathogenic bacteria to affect higher organisms and cause disease is one of the most dramatic properties of microorganisms. Some pathogens can establish transient colonization only, but others are capable of infecting their host for many years or even for a lifetime. Long-term infection is called persistence, and this phenotype is fundamental for the biology of important human pathogens, including Helicobacter pylori, Mycobacterium tuberculosis, and Salmonella enterica. Both typhoidal and nontyphoidal serovars of the species Salmonella enterica can cause persistent infection in humans; however, as these two Salmonella groups cause clinically distinct diseases, the characteristics of their persistent infections in humans differ significantly. Here, following a general summary of Salmonella pathogenicity, host specificity, epidemiology, and laboratory diagnosis, I review the current knowledge about Salmonella persistence and discuss the relevant epidemiology of persistence (including carrier rate, duration of shedding, and host and pathogen risk factors), the host response to Salmonella persistence, Salmonella genes involved in this lifestyle, as well as genetic and phenotypic changes acquired during prolonged infection within the host. Additionally, I highlight differences between the persistence of typhoidal and nontyphoidal Salmonella strains in humans and summarize the current gaps and limitations in our understanding, diagnosis, and curing of persistent Salmonella infections.
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