scholarly journals Assessment of Antibiotic Resistance Phenotype and Integrons in Salmonella enterica serovar Typhimurium Isolated from Swine

2008 ◽  
Vol 70 (10) ◽  
pp. 1133-1137 ◽  
Author(s):  
Nabin RAYAMAJHI ◽  
Sang Gyun KANG ◽  
Mi Lan KANG ◽  
Hee Soo LEE ◽  
Kyung Yoon PARK ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Salmonella Enterica ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Resistance Phenotype ◽  
Serovar Typhimurium

scholarly journals Antibiotic Resistance in Salmonella enterica Serovar Typhimurium Exposed to Microcin-Producing Escherichia coli

2001 ◽  
Vol 67 (8) ◽  
pp. 3763-3766 ◽  
Author(s):  
Steve A. Carlson ◽  
Timothy S. Frana ◽  
Ronald W. Griffith
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Salmonella Enterica ◽  
Pathogenic Bacteria ◽  
Defense Mechanism ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Multidrug Resistant ◽  
E Coli ◽  
Resistant Phenotype ◽  
Serovar Typhimurium

ABSTRACT Microcin 24 is an antimicrobial peptide secreted by uropathogenicEscherichia coli. Secretion of microcin 24 provides an antibacterial defense mechanism for E. coli. In a plasmid-based system using transformed Salmonella enterica, we found that resistance to microcin 24 could be seen in concert with a multiple-antibiotic resistance phenotype. This multidrug-resistant phenotype appeared when Salmonella was exposed to an E. coli strain expressing microcin 24. Therefore, it appears that multidrug-resistant Salmonellacan arise as a result of an insult from other pathogenic bacteria.

scholarly journals Gene Transfer between Salmonella enterica Serovar Typhimurium inside Epithelial Cells

2002 ◽  
Vol 184 (8) ◽  
pp. 2235-2242 ◽  
Author(s):  
Gayle C. Ferguson ◽  
Jack A. Heinemann ◽  
Martin A. Kennedy
Keyword(s):  
Antibiotic Resistance ◽  
Gene Transfer ◽  
Salmonella Enterica ◽  
Genetically Modified Organisms ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Antibiotic Resistance Genes ◽  
Human Cells ◽  
Serovar Typhimurium ◽  
Cultured Human Cells ◽  
Eukaryotic Organisms

ABSTRACT Virulence and antibiotic resistance genes transfer between bacteria by bacterial conjugation. Conjugation also mediates gene transfer from bacteria to eukaryotic organisms, including yeast and human cells. Predicting when and where genes transfer by conjugation could enhance our understanding of the risks involved in the release of genetically modified organisms, including those being developed for use as vaccines. We report here that Salmonella enterica serovar Typhimurium conjugated inside cultured human cells. The DNA transfer from donor to recipient bacteria was proportional to the probability that the two types of bacteria occupied the same cell, which was dependent on viable and invasive bacteria and on plasmid tra genes. Based on the high frequencies of gene transfer between bacteria inside human cells, we suggest that such gene transfers occur in situ. The implications of gene transfer between bacteria inside human cells, particularly in the context of antibiotic resistance, are discussed.

scholarly journals Diverse and Flexible Transmission of fosA3 Associated with Heterogeneous Multidrug Resistance Regions in Salmonella enterica Serovar Typhimurium and Indiana Isolates

2019 ◽  
Vol 64 (2) ◽  
Author(s):  
Liang-Xing Fang ◽  
Qi Jiang ◽  
Guo-Hui Deng ◽  
Bing He ◽  
Ruan-Yang Sun ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Multidrug Resistance ◽  
Resistance Genes ◽  
Salmonella Enterica ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Antibiotic Resistance Genes ◽  
Guangdong Province ◽  
Great Flexibility ◽  
Serovar Typhimurium ◽  
M 14

ABSTRACT We identified fosA3 at a rate of 2.6% in 310 Salmonella isolates from food animals in Guangdong province, China. The fosA3 gene was genetically linked to diverse antibiotic resistance genes (ARGs), including mcr-1, blaCTX-M-14/55, oqxAB, and rmtB. These gene combinations were embedded in heterogeneous fosA3-containing multidrug resistance regions on the transferable ST3-IncHI2 and F33:A−:B− plasmids and the chromosome. This indicated a great flexibility of fosA3 cotransmission with multiple important ARGs among Salmonella species.

scholarly journals Occurrence of a Salmonella enterica Serovar Typhimurium DT104-Like Antibiotic Resistance Gene Cluster Including thefloR Gene in S. enterica Serovar Agona

2000 ◽  
Vol 44 (5) ◽  
pp. 1359-1361 ◽  
Author(s):  
Axel Cloeckaert ◽  
Karim Sidi Boumedine ◽  
Geraldine Flaujac ◽  
Hein Imberechts ◽  
Inge D'Hooghe ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Gene Cluster ◽  
Resistance Gene ◽  
Salmonella Enterica ◽  
Salmonella Enterica Serovar Typhimurium ◽  
Antibiotic Resistance Gene ◽  
Cross Resistance ◽  
Chromosomal Locus ◽  
Resistance Gene Cluster ◽  
Serovar Typhimurium

ABSTRACT Recently a chromosomal locus possibly specific for Salmonella enterica serovar Typhimurium DT104 has been reported that contains a multiple antibiotic resistance gene cluster. Evidence is provided that Salmonella enterica serovar Agona strains isolated from poultry harbor a similar gene cluster including the newly described floR gene, conferring cross-resistance to chloramphenicol and florfenicol.

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