scholarly journals Inhibition of Staphylococcus aureus Growth on Tellurite-Containing Media by Lactobacillus reuteri Is Dependent on CyuC and Thiol Production

2006 ◽  
Vol 73 (3) ◽  
pp. 1005-1009 ◽  
Author(s):  
Mark S. Turner ◽  
Raquel Lo ◽  
Philip M. Giffard
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Lactobacillus Reuteri

ABSTRACT Lactobacillus reuteri inhibits Staphylococcus aureus growth on Baird-Parker agar. This activity required the presence of tellurite and was not shared with other lactic acid bacteria or an L. reuteri mutant defective in cystine metabolism. Secreted products generated from L. reuteri cystine metabolism and thiols were shown to augment tellurite toxicity.

scholarly journals Staphylococcus aureus adheres to human intestinal mucus but can be displaced by certain lactic acid bacteria

Microbiology ◽  
2006 ◽  
Vol 152 (6) ◽  
pp. 1819-1826 ◽  
Author(s):  
Satu Vesterlund ◽  
Matti Karp ◽  
Seppo Salminen ◽  
Arthur C. Ouwehand
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Intestinal Tract ◽  
Lactobacillus Reuteri ◽  
Lactobacillus Rhamnosus ◽  
Gastrointestinal Diseases ◽  
Staph Aureus ◽  
Antimicrobial Substances ◽  
Intestinal Mucus

There is increasing evidence that Staphylococcus aureus may colonize the intestinal tract, especially among hospitalized patients. As Staph. aureus has been found to be associated with certain gastrointestinal diseases, it has become important to study whether this bacterium can colonize the intestinal tract and if so, whether it is possible to prevent colonization. Adhesion is the first step in colonization; this study shows that Staph. aureus adheres to mucus from resected human intestinal tissue. Certain lactic acid bacteria (LAB), mainly commercial probiotics, were able to reduce adhesion and viability of adherent Staph. aureus. In displacement assays the amount of adherent Staph. aureus in human intestinal mucus was reduced 39–44 % by Lactobacillus rhamnosus GG, Lactococcus lactis subsp. lactis and Propionibacterium freudenreichii subsp. shermanii. Moreover, adherent Lactobacillus reuteri, Lc. lactis and P. freudenreichii reduced viability of adherent Staph. aureus by 27–36 %, depending on the strain, after 2 h incubation. This was probably due to the production of organic acids and hydrogen peroxide and possibly in the case of L. reuteri to the production of reuterin. This study shows for the first time that Staph. aureus can adhere to human intestinal mucus and adherent bacteria can be displaced and killed by certain LAB strains via in situ production of antimicrobial substances.

scholarly journals Complete Genome Sequence of Lactobacillus reuteri Byun-re-01, Isolated from Mouse Small Intestine

2018 ◽  
Vol 7 (17) ◽  
Author(s):  
Dongjun Kim ◽  
Mun-ju Cho ◽  
Seungchan Cho ◽  
Yongjun Lee ◽  
Sung June Byun ◽  
...  
Keyword(s):  
Small Intestine ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Lactobacillus Reuteri ◽  
Probiotic Bacteria ◽  
Content Type ◽  
Mouse Small Intestine

Lactic acid bacteria (LAB) are generally recognized as safe (GRAS) and serve as probiotic bacteria when consumed in adequate amounts. Here, we report the complete genome sequence of Lactobacillus reuteri Byun-re-01, isolated from mouse small intestine.

Efficacy of Nisin against Staphylococcus aureus in Experimentally Contaminated Sucuk, a Turkish-Type Fermented Sausage

2009 ◽  
Vol 72 (8) ◽  
pp. 1739-1743 ◽  
Author(s):  
HAMPARSUN HAMPIKYAN
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Water Activity ◽  
Aerobic Bacteria ◽  
Fermented Sausage ◽  
Subsequent Storage

Sucuk is a fermented sausage widely consumed in Turkey. The ability of different concentrations of nisin to inhibit Staphylococcus aureus in artificially contaminated sucuk was examined. Sucuk dough was prepared, inoculated with S. aureus ATCC 25923 at a level of 106 CFU/g, and then divided into six equal portions to which different concentrations of nisin (0, 25, 50, 100, 150, 200 μg/g) were added. Microbiological (S. aureus, total mesophilic aerobic bacteria, and lactic acid bacteria) and physicochemical (pH, water activity, and moisture) analyses were conducted initially and after 1, 3, 5, 10, 15, 20, 25, 30, 35, and 45 days. S. aureus populations decreased to below detectable limits in sucuk containing 200 or 150 μg of nisin per g after 30 and 35 days of storage, respectively, whereas S. aureus populations in 45-day-old sucuk containing 0, 25, 50, and 100 μg of nisin per g were 5.36, 5.68, 4.10, and 3.54 log CFU/g, respectively. Hence, the addition of nisin at 150 μg/g or greater to sucuk dough can be used to prevent the growth of S. aureus in sucuk during fermentation and subsequent storage.

scholarly journals EFFECT OF EXOPOLISACCHARIDES OF LACTIC ACID BACTERIA ON THE SYNTHESIS OF PROINFLAMMATORY CYTOKINES BY MACROPHAGIC MICE IN PHAGOCYTOSIS OF STAPHYLOCOCCUS AUREUS

2018 ◽  
pp. 67-71
Author(s):  
G. T. Uryadova ◽  
E. A. Gorelnikova ◽  
N. A. Fokina ◽  
A. S. Dolmashkina ◽  
L. V. Karpunina
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Lactococcus Lactis ◽  
Inflammatory Cytokines ◽  
Proinflammatory Cytokines ◽  
Streptococcus Thermophilus ◽  
Ambiguous Effect ◽  
Pro Inflammatory Cytokines

Aim. Study of the effect of exopolysaccharides (EPS) of lactic acid cocci on cytokine activity of macrophages of mice with phagocytosis in vitro Staphylococcus aureus 209-P. Materials and methods. The EPS of Streptococcus thermophilus and Lactococcus lactis B-1662 was used in the work. At 13, 5 and 7, AMP and PMP were isolated and the phagocytosis process was modeled in vitro. After 30 minutes, 1, 6 and 24 hours, the content of pro-inflammatory cytokines IL-1a and TNF-a was determined. Results. EPSs had an ambiguous effect on the production of cytokines. The greatest effect on the synthesis was provided by EPS of S. thermophilus. Conclusion. The results of the study allow us to talk about the possibility of using EPS of S. thermophilus as a preventive immunomodulator for correction of the cytokine status of animals.

scholarly journals Probiotic Bifunctionality of Bacillus subtilis—Rescuing Lactic Acid Bacteria from Desiccation and Antagonizing Pathogenic Staphylococcus aureus

2019 ◽  
Vol 7 (10) ◽  
pp. 407 ◽  
Author(s):  
Hadar Kimelman ◽  
Moshe Shemesh
Keyword(s):  
Staphylococcus Aureus ◽  
Bacillus Subtilis ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Pathogenic Bacteria ◽  
Lactobacillus Rhamnosus ◽  
Probiotic Bacterium ◽  
Probiotic Bacteria ◽  
Mammalian Host ◽  
Beneficial Effects

Live probiotic bacteria obtained with food are thought to have beneficial effects on a mammalian host, including their ability to reduce intestinal colonization by pathogens. To ensure the beneficial effects, the probiotic cells must survive processing and storage of food, its passage through the upper gastrointestinal tract (GIT), and subsequent chemical ingestion processes until they reach their target organ. However, there is considerable loss of viability of the probiotic bacteria during the drying process, in the acidic conditions of the stomach, and in the high bile concentration in the small intestine. Bacillus subtilis, a spore-forming probiotic bacterium, can effectively maintain a favorable balance of microflora in the GIT. B. subtilis produces a protective extracellular matrix (ECM), which is shared with other probiotic bacteria; thus, it was suggested that this ECM could potentially protect an entire community of probiotic cells against unfavorable environmental conditions. Consequently, a biofilm-based bio-coating system was developed that would enable a mutual growth of B. subtilis with different lactic acid bacteria (LAB) through increasing the ECM production. Results of the study demonstrate a significant increase in the survivability of the bio-coated LAB cells during the desiccation process and passage through the acidic environment. Thus, it provides evidence about the ability of B. subtilis in rescuing the desiccation-sensitive LAB, for instance, Lactobacillus rhamnosus, from complete eradication. Furthermore, this study demonstrates the antagonistic potential of the mutual probiotic system against pathogenic bacteria such as Staphylococcus aureus. The data show that the cells of B. subtilis possess robust anti-biofilm activity against S. aureus through activating the antimicrobial lipopeptide production pathway.

scholarly journals Lactic Acid Bacteria as Biological Control of Staphylococcus aureus in Goat "Coalho" Cheese

2018 ◽  
Vol 56 (3) ◽  
Author(s):  
Rânmilla Cristhina Santos Castro ◽  
◽  
Anay Priscilla David de Oliveira ◽  
Eline Almeida Rodrigues de Souza ◽  
Tayla Marielle Antunes Correia ◽  
...  
Keyword(s):  
Biological Control ◽  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria

scholarly journals Effects of mixed lactic acid bacteria on intestinal microbiota of mice infected with Staphylococcus aureus

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Dayong Ren ◽  
Shengjie Gong ◽  
Jingyan Shu ◽  
Jianwei Zhu ◽  
Hongyan Liu ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Intestinal Microbiota

CONTROL OF CLOSTRIDIUM BOTULINUM AND STAPHYLOCOCCUS AUREUS IN SEMI-PRESERVED MEAT PRODUCTS

1972 ◽  
Vol 35 (9) ◽  
pp. 514-523 ◽  
Author(s):  
Han's Riemann ◽  
W. H. Lee ◽  
C. Genigeorgis
Keyword(s):  
Staphylococcus Aureus ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Clostridium Botulinum ◽  
Meat Product ◽  
Meat Products ◽  
Rapid Decline ◽  
Ph Values ◽  
And Staphylococcus Aureus ◽  
Brine Concentration

Clostridium botulinum and Staphylococcus aureus are naturally occurring contaminants in semi-preserved meat products. They can be inhibited by (a) storage below 3 C, (b) 10% sodium chloride (brine concentration), (c) pH values below 4.5, or (d) proper combinations of these factors. However, most meat products do not have the pH values and brine concentrations required to completely inhibit C. botulinum and S. aureus and there is always a risk of temperature abuse. Improved safety can be achieved by adding 1% or more glucose to the product. The glucose will, in the event of temperature abuse, generally be fermented to lactic acid by the indigenous microflora in the product. As a result, the pH value drops to a level at which the brine concentration is sufficient to inhibit C. botulinum and S. aureus. A better approach to safety is to add, together with glucose, a radiation-killed preparation of lactic acid bacteria, e.g., Pediococcus cerevisiae. Such preparations cause a rapid decline in pH only when the product is exposed to a high temperature, and they are stable during storage of meat products. Addition of irradiated lactic acid bacteria to meat products has not yet been officially approved. Another way to improve the safety of semi-preserved meat is to add sufficient glucono-delta-lactone to reduce the initial pH of the product to a level at which the salt concentration is inhibitory. Use of larger amounts of glucono-delta-lactone may result in flavor and color problems even when the meat product is kept at refrigeration temperatures.

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