Information transfer in Salmonella typhimurium.

Gene transfer between Salmonella enterica serovar Typhimurium inside epithelial cells.

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...

Salmonella typhimurium

Gene transfer between related bacteria by electrotransformation: mapping Salmonella typhi genes in Salmonella typhimurium.

Transfer of newly isolated mutations into a fresh background is an essential step of genetic analysis and strain construction. Gene transfer is hampered in Salmonella typhi and in other pathogenic bacteria by the lack of a generalized transduction system. We show here that this problem can be partially circumvented by using electrotransformation as a means for delivering S. typhi DNA into suita...

Ethanolamine utilization in Salmonella typhimurium.

Ethanolamine can serve as the sole source of carbon and nitrogen for Salmonella typhimurium if vitamin B12 is present to serve as a cofactor. The pathway for ethanolamine utilization has been investigated in order to understand its regulation and determine whether the pathway is important to the selective forces that have maintained the ability to synthesize B12 in S. typhimurium. We isolated m...

Diversification in Salmonella Typhimurium DT104

To the Editor: Multidrug-resistant (MDR) Salmonella Typhimurium definitive phage type (DT) 104 with chromosomally encoded resistance to ampicillin, chloramphenicol, strepto-mycin/spectinomycin, sulfonamides, and tetracyclines (ACSSpSuT) was first identified and characterized in the United Kingdom in the early 1990s (1). MDR DT104 has subsequently caused numerous outbreaks throughout the world (...