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Class 1 Integrons, Gene Cassettes, Mobility, and Epidemiology
European Journal of Clinical Microbiology & Infectious Diseases, 1999Integrons are genetic elements that, although unable to move themselves, contain gene cassettes that can be mobilized to other integrons or to secondary sites in the bacterial genome. The majority of approximately 60 known gene cassettes encode resistance to antibiotics. Recently, a number of gene cassettes encoding extended-spectrum beta-lactamases or
A C, Fluit, F J, Schmitz
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Distribution of class 1 integrons in a highly impacted catchment
Science of The Total Environment, 2016Polluted compounds into freshwater sediments may select and enrich bacteria carrying specific genetic compositions. Here we examine the possible use of class 1 integrons as bioindicators in freshwater environments. Samples were collected from various sediments in an urban area (Zhangye, Gansu province, China), specifically within the city, in the ...
Luigimaria Borruso +4 more
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Molecular Characterization of Class 1 Integrons in Carbapenem-Resistant Enterobacteriaceae Isolates
SSRN Electronic Journal, 2022Carbapenem-resistant Enterobacterales (CRE) infections result in higher treatment costs and mortality rates. Integrons play important roles in emergence and spread of antibiotic resistant genes. To get a better understand on the effects of integron on CRE resistance, distribution of common carbapenemase genes and class 1 integron in clinical CRE ...
Tong Wang +4 more
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Transcription of integron‐harboured gene cassette impacts integration efficiency in class 1 integron
Molecular Microbiology, 2011SummaryClass 1 integrons play important roles in the dissemination of antibiotic resistance genes among bacteria. Generally, class 1 integron consists of an integrase gene (intI1), a recombination site (attI1) and a promoter (Pc) that drives the transcription of the downstreamed gene cassettes.
Quhao, Wei +6 more
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Water Research, 2012
In this study, 1832 strains of the family Enterobacteriaceae were isolated from different stages of a municipal wastewater treatment plant, of which 221 (12.1%) were intI-positive. Among them 61.5% originated from raw sewage, 12.7% from aeration tank and 25.8% from the final effluent. All of the intI-positive strains were multiresistant, i.e. resistant
Joanna Mokracka +2 more
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In this study, 1832 strains of the family Enterobacteriaceae were isolated from different stages of a municipal wastewater treatment plant, of which 221 (12.1%) were intI-positive. Among them 61.5% originated from raw sewage, 12.7% from aeration tank and 25.8% from the final effluent. All of the intI-positive strains were multiresistant, i.e. resistant
Joanna Mokracka +2 more
exaly +3 more sources
Current Microbiology, 2010
The antimicrobial resistance and the character of integrons were determined in 58 Shigella flexneri strains isolated from China. All isolates were multi-drug resistant and found to carry integrons of class 1 (94.8%), class 2 (100%), or both (94.8%). No intI3 was detected.
Jing Yuan, Zhu +4 more
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The antimicrobial resistance and the character of integrons were determined in 58 Shigella flexneri strains isolated from China. All isolates were multi-drug resistant and found to carry integrons of class 1 (94.8%), class 2 (100%), or both (94.8%). No intI3 was detected.
Jing Yuan, Zhu +4 more
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Class 1 integrons as invasive species
Current Opinion in Microbiology, 2017Clinical class 1 integrons are a major contributor to the evolution and dissemination of antibiotic resistance. The conserved motifs of these integrons suggest that a single, recent ancestor gave rise to all current variants. They have had a spectacular increase in distribution and abundance over the last 100 years, exhibiting many similarities to ...
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Diagnostic Microbiology and Infectious Disease, 2010
During 2003 to 2004, class 1 integron was detected in 8 out of 10 tested enterococci isolates, with 2 of them positive for class 2 integron. This is the first report of class 2 integron in Enterococcus faecalis and class 1 integron in Enterococcus faecium.
Zhenbo, Xu +7 more
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During 2003 to 2004, class 1 integron was detected in 8 out of 10 tested enterococci isolates, with 2 of them positive for class 2 integron. This is the first report of class 2 integron in Enterococcus faecalis and class 1 integron in Enterococcus faecium.
Zhenbo, Xu +7 more
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Detection and Characterization of Class 1 Integrons in Enterohemorrhagic Escherichia coli
Microbial Drug Resistance, 2002Enterohemorrhagic Escherichia coli (EHEC) strains isolated from humans, cattle, and food and belonging to serogroups O26 (7 strains), O111 (19 strains), and O157 (70 strains) were examined for susceptibility to 11 antimicrobial drugs. Fifty-nine strains showing resistance to at least
Morabito S +4 more
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DNA as a Pollutant: the Clinical Class 1 Integron
Current Pollution Reports, 2018When humans first tried to control bacterial growth with antimicrobials, DNA elements called integrons began to accumulate genes for resistance. The clinical class 1 integron accumulated diverse antibiotic resistance genes, spread into multiple bacterial species, colonized a wide range of animal and plant hosts, and spread to every continent.
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