![]() ![]() There are over 30 species of staphylococci identified, and they are typically found on the skin and mucous membranes of mammals. By 16S ribosomal sequencing, they are most closely related to the Gram-positive, low G+C content Bacillus-Lactobacillus- Staphylococcus genera (Woese, 1987). The staphylococci are Gram-positive cocci that divide to form clusters that look like grapes. ![]() Whole-genome sequencing revealed that mecC1 forms part of a class E mec complex (mecI-mecR1-mecC1-blaZ) located at the orfX locus as part of a likely staphylococcal cassette chromosome mec element (SCCmec) remnant, which also contains a number of other genes present on the type XI SCCmec. In this study, we identified a Staphylococcus xylosus isolate that harbors a new allotype of the mecC gene, mecC1. Recently, a novel variant of mecA known as mecC (mecALGA251) was identified in Staphylococcus aureus isolates from both humans and animals. Larsen, Anders Rhod Petersen, Andreas Leroy, Sabine De Vliegher, Sarne Perreten, Vincent Fox, Lawrence K. All rights reserved.Ī Staphylococcus xylosus Isolate with a New mecC Allotype We hypothesize that this ability could give an advantage to S. This study characterized for the first time the capacity of a Staphylococcus to use iron from ferritin and revealed that a potential reductive pathway was involved in this acquisition. ![]() Transcriptional analysis of the mutant revealed downregulation of several genes involved in the response to oxidative stress. The mutant showed decreased growth because it was less able to acquire iron from ferritin. We generated a deletion-insertion in the first gene of the operon and evaluated the phenotype of the mutant. A three-cistron operon was highly overexpressed under ferritin iron growth conditions. xylosus C2a strain grows in the presence of ferritin as a sole iron source. It is highly resistant to microbial attack and few microorganisms can use it as an iron source. Ferritin is a storage protein able to capture large quantities of iron. Meat is particularly rich in haemic (myoglobin and haemoglobin) and non-haemic (ferritin and transferrin) iron sources. ![]() Iron is a key element for growth and survival of bacteria. Moreover, this species is one of the major starter cultures used for meat fermentation. Staphylococcus xylosus is frequently isolated from food of animal origin. Vermassen, Aurore Talon, Régine Leroy, Sabine PMID:24031331įerritin, an iron source in meat for Staphylococcus xylosus? The study demonstrated that the Staphylococcus xylosus strains AD1 and U5 showed significant growth during fermentation, stability over freeze-dried process, negative reaction for staphylococcal enterotoxins and viability for using as a single-strain culture or associated with lactic acid bacteria for production of fermented sausages. Viability of Staphylococcus xylosus isolated from artisanal sausages for application as starter cultures in meat products Viability of Staphylococcus xylosus strains AD1 and U5 isolated from natural fermented sausages was investigated as starter cultures in fermented sausages produced in the South Region of Brazil. Viability of Staphylococcus xylosus isolated from artisanal sausages for application as starter cultures in meat productsįiorentini, Ângela Maria Sawitzki, Maristela Cortez Bertol, Teresinha Marisa Sant’Anna, Ernani S. Viability of Staphylococcus xylosus isolated from artisanal sausages for application as starter cultures in meat products.įiorentini, Angela Maria Sawitzki, Maristela Cortez Bertol, Teresinha Marisa Sant'anna, Ernani S ![]()
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