Other Gram-Positive Bacilli

Bratcher, Denise F.

doi:10.1016/b978-0-323-40181-4.00133-x

Cited by 6 publications

(4 citation statements)

References 234 publications

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“…are a major group of lactic acid bacteria (LAB), which are Gram-positive, facultatively anaerobic, rod-shaped as well as non-sporulating [ 64 ]. They are both oxidase- and catalase-negative, and can ferment carbohydrates as well as hydrolyze esculin [ 65 ]. Lactobacillus spp.…”

Section: Lactobacillus Sppmentioning

confidence: 99%

“…Apart from that, Lactobacillus spp. are also regular flora colonizing the GI tract and the female genital tract, where they contribute to partial inhibition of pathogenic microorganisms due to the production of lactic acid [ 65 ]. In addition, they are common microbial species that inhabit the human mouth, which has been reported to be associated with dental caries [ 68 ].…”

Section: Lactobacillus Sppmentioning

confidence: 99%

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The Potential of Lactobacillus spp. for Modulating Oxidative Stress in the Gastrointestinal Tract

Kong

Olejar

et al. 2020

Antioxidants

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The gastrointestinal (GI) tract is crucial for food digestion and nutrient absorption in humans. However, the GI tract is usually challenged with oxidative stress that can be induced by various factors, such as exogenous pathogenic microorganisms and dietary alterations. As a part of gut microbiota, Lactobacillus spp. play an important role in modulating oxidative stress in cells and tissues, especially in the GI tract. Oxidative stress is linked with excessive reactive oxygen species (ROS) that can be formed by a few enzymes, such as nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (NOXs). The redox mechanisms of Lactobacillus spp. may contribute to the downregulation of these ROS-forming enzymes. In addition, nuclear factor erythroid 2 (NFE2)-related factor 2 (Nrf-2) and nuclear factor kappa B (NF-κB) are two common transcription factors, through which Lactobacillus spp. modulate oxidative stress as well. As oxidative stress is closely associated with inflammation and certain diseases, Lactobacillus spp. could potentially be applied for early treatment and amelioration of these diseases, either individually or together with prebiotics. However, further research is required for revealing their mechanisms of action as well as their extensive application in the future.

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Section: Lactobacillus Sppmentioning

confidence: 99%

Section: Lactobacillus Sppmentioning

confidence: 99%

The Potential of Lactobacillus spp. for Modulating Oxidative Stress in the Gastrointestinal Tract

Kong

Olejar

et al. 2020

Antioxidants

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“…Sci. 2024, 14, 2093. https://doi.org/10.3390/app14052093 https://www.mdpi.com/journal/applsci and catalase-negative; they ferment carbohydrates and hydrolyze esculin [2]. Bacteria of the Lactobacillus genus are widespread in the environment, with high biological and functional activity, which determines their practical application as components of probiotics and synbiotics, of starter cultures for the production of lactic acid products, raw dried meat products, bread and bakery products, and fermented fruits and vegetables, and their role in the targeted fermentation process and biological preservation of food emulsions [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Identification of Lactic Acid Bacteria Strains Isolated from Sourdoughs Prepared with Different Flour Types

Urshev,

Doynova,

Prasev

et al. 2024

Applied Sciences

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Species identification is the first step in the examination of newly isolated microorganism strains, including the cases when they are intended for application in the development of probiotic preparations or starters for different food products. The thorough identification process of newly isolated strains combines the application of different physiological, biochemical, and molecular genetic methods. The aim of the present study was to identify the species-level lactic acid bacteria (LAB) strains isolated from spontaneously fermented sourdoughs prepared from different flour types: Khorosan wheat, wheat, barley, buckwheat, spelled, spelt, and corn. Both classical phenotypic (cellular morphology characterization, and API 50 CHL) and molecular genetic methods (RAPD, ARDRA-analysis, 16S rDNA sequencing, and species-specific PCR) were applied. It was found that cultures with a short-rod morphology predominated among the 30 sourdough isolates. According to the RAPD profiles obtained, the isolates were divided into nine genotypes corresponding to nine genetically distinct strains. It was determined that individual sourdoughs made with different flour types shared cultures with a common genotype. The analysis of the physiological and biochemical profiles of the LAB isolates performed with the API 50 CHL system divided them into two groups according to their identification: Lactiplantibacillus plantarum (Lp. plantarum) 1 and Levilactobacillus brevis (Lv. brevis) 3. According to the 16S rDNA restriction profile, the LAB isolates showed two profiles corresponding to the Lp. plantarum and Lv. brevis groups. 16S rDNA sequencing and a comparison of the partially read 16S rDNA sequences of the studied isolates confirmed that some of them belonged to the Lv. Brevis species, but did not provide sufficient evidence that the rest of the cultures belonged to the Lp. Plantarum species. The species-specific PCR clearly separated the isolates from the Lp. plantarum group into two groups: isolates of the Lp. plantarum species and isolates of the Lp. paraplantarum species. The summary of the results of the conducted polyphasic taxonomic study determined the investigated LAB strains isolated from spontaneously fermented sourdoughs as representatives of the Lv. brevis, Lp. plantarum ssp. paraplantarum, and Lp. paraplantarum species.

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“…13 A combination of antibiotic agents and the removal of catheters have successfully cleared previously published bloodstream infections. 1,13,14 It is believed that the growth of Tsukamurella species is inhibited by the ribosylation of the 23-OH group of antibiotics. 1 The recommended combination includes beta-lactams or macrolides with aminoglycosides for a relatively long period (2–8 weeks).…”

mentioning

confidence: 99%

Amikacin Monotherapy for Peripherally Inserted Central Catheter-Related Bloodstream Infection due to Tsukamurella pulmonis

Beran

Mhanna

Srour

et al. 2021

American Journal of Therapeutics

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Although amikacin monotherapy seems to have provided clinical success, we cannot exclude the possibility that line removal alone was responsible for this infection's resolution. Others have similarly observed the persistence of T. pulmonis bacteremia despite adequate antibiotic coverage until catheter removal. 8 This case of T. pulmonis bacteremia contributes to the growing literature on this rare microorganism. It highlights the importance of line removal for effective blood culture clearance and supports the role of amikacin in treatment. Future studies are needed to further understand the optimal susceptibility methods and appropriate treatment regimens for T. pulmonis.

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Other Gram-Positive Bacilli

Cited by 6 publications

References 234 publications

The Potential of Lactobacillus spp. for Modulating Oxidative Stress in the Gastrointestinal Tract

The Potential of Lactobacillus spp. for Modulating Oxidative Stress in the Gastrointestinal Tract

Identification of Lactic Acid Bacteria Strains Isolated from Sourdoughs Prepared with Different Flour Types

Amikacin Monotherapy for Peripherally Inserted Central Catheter-Related Bloodstream Infection due to Tsukamurella pulmonis

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