Sodium chloride, potassium chloride, and virulence in Listeria monocytogenes

Article Abstract:

The effects of different levels of NaCl and KCl on the activities of the virulence factor listeriolysin O (LLO) and postulated virulence factors catalase (CA) and superoxide dismutase (SOD) were investigated. The results showed that either salt could increase the activities of LLO, CA and SOD. However, virulence analysis on mouse livers and spleens after intravenous infection showed that although LLO is required for virulence, salt treatment leading to increases in LLO, CA and SOD did not increase virulence.

Physiological aspects, Salt, Salt (Food), Potassium chloride

---

Investigation of specific substitution in virulence genes characterizing phenotypic groups of low-virulence field strains of Listeria monocytogenes

Article Abstract:

Twenty-six field Listeria monocytogenes strains were shown to be of low virulence in a plaque-forming assay and in subcutaneous inoculation test on mice by assigning four groups (I, II, III, IV). The results demonstrates a relationship between the phenotypic classification and the genotypic modifications for at least group I and III and suggest a common evaluation of these strains within the group.

Genotype, Genotypes

---

Recurrent and sporadic Listeria monocytogenes contamination in alheiras represents considerable diversity, including virulence-attenuated isolates

Article Abstract:

Listeria monocytogenes isolates from alheiras were characterized using a several subtyping techniques to better understand contamination patterns. The subtyping method provided information about Listeria monocytogenes contamination patterns and provided evidence for the persistence of specific Listeria monocytogenes types.

Meat Processed from Carcasses, Sausages and other prepared meats, Portugal, Smoked & Cooked Sausage Prods, Contamination, Report, Smoked and cooked sausage

Similar abstracts:

• Abstracts: Mutational analysis of the role of HPr in Listeria monocytogenes. Collapse of the proton motive force in Listeria monocytogenes caused by a bacteriocin produced by Pediococcus acidilacti
• Abstracts: Use of a fluorogenic probe in a PCR-based assay for the detection of Listeria monocytogenes. Polymerase chain reaction amplification of napthalene catabolic and 16S rRNA gene sequences from indigenous sediment bacteria
• Abstracts: Contacts in context: promoter specificity and macromolecular interactions in transcription. Transcript cleavage factors from E. coli
• Abstracts: Investigation of the effect of combined variations in temperature, pH, and NaCl concentration on nisin inhibition of Listeria monocytogenes and Staphylococcus aureus
• Abstracts: Transduction, restriction and recombination patterns in Escherichia coli. Sequence comparisons

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.