Enterococcus olivae sp. nov., isolated from Spanish-style green-olive fermentations

Lucena-Padrós, Helena; González, Juan M.; Caballero-Guerrero, Belén; Ruiz-Barba, José Luis; Maldonado‐Barragán, Antonio

doi:10.1099/ijs.0.062208-0

Cited by 19 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Acidogenic bacteria were dominant in bacterial communities of both R CC and R OC . Lactococcus and Enterococcus (Lucena-Padros et al, 2014;Yan Yang et al, 2016), lactic acid producing bacterial genera, were most abundant in the bacteria, and their relative abundance in R OC (~70%) was much higher than that in R CC (~50%), which also showed similar trends to the simulation results.…”

Section: Effect Of Bioelectrochemistry On Functional Community Colonizationsupporting

confidence: 73%

Computational and experimental analysis of organic degradation positively regulated by bioelectrochemistry in an anaerobic bioreactor system

et al. 2017

View full text Add to dashboard Cite

Methane production was tested in membrane-less microbial electrolysis cells (MECs) under closed-circuit (R) and open-circuit (R) conditions, using glucose as a substrate, to understand the regulatory effects of bioelectrochemistry in anaerobic digestion systems. A dynamic model was built to simulate methane productions and microbial dynamics of functional populations, which were colonized in groups R and R during the start-up stage. The experiment results showed significantly greater methane production in R than R, the average methane production of R was 0.131 m/m/d, which was 1.4 times higher than that of R (0.055 m/m/d). The simulation results revealed that bioelectrochemistry had a significant influence on the abundance of microorganisms involved in acidogenesis and methanogenesis. The abundance of glucose-uptaking microorganisms was 87% of the total biomass in R without applied voltage, which was 20% higher than that in R (67%) when external voltages were applied between the anode and cathode. The abundance of hydrogenotrophic methanogens in R was 6% higher than that in R. The simulation results were verified through 16S rDNA high-throughput sequencing analysis. An electron balance analysis revealed that alteration of the acidogenesis type led to more acetate and hydrogen production from glucose fermentation, compared with the situation without bioelectrochemistry. An additional pathway from acetate to hydrogen was introduced by bioelectrolysis. These two factors resulted in significant enhancement of methane production in R. Bioelectrolysis process directly contributed to 26% of the total methane production after the start-up stage. When the applied voltages were cut down or decreased, R could maintain considerable methane productions, because the microbial communities and electron transfer pathways were already formed. Starting-up with high voltage, but operating under low voltage, could be an energy-favorable strategy for accelerating biogas production in bioelectro-anaerobic bioreactors.

show abstract

Section: Effect Of Bioelectrochemistry On Functional Community Colonizationsupporting

confidence: 73%

Computational and experimental analysis of organic degradation positively regulated by bioelectrochemistry in an anaerobic bioreactor system

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The plant-associated enterococci species mainly include E. faecium, E. mundtii, E. casseliflavus, E. faecalis , and E. sulfurous (Müller et al, 2001 ). Enterococci were found in fermented green olives and are likely to be involved in the fermentation process of olives (de Castro et al, 2002 ; De Bellis et al, 2010 ; Corsetti et al, 2012 ; Lucena-Padrós et al, 2014 ). Those members are well adapted for initial pH value ?…”

Section: Current Applications Of Enterococci and Their Bacteriocinsmentioning

confidence: 99%

The Genus Enterococcus: Between Probiotic Potential and Safety Concerns—An Update

et al. 2018

View full text Add to dashboard Cite

A considerable number of strains belonging to different species of Enterococcus are highly competitive due to their resistance to wide range of pH and temperature. Their competitiveness is also owed to their ability to produce bacteriocins recognized for their wide-range effectiveness on pathogenic and spoilage bacteria. Enterococcal bacteriocins have attracted great research interest as natural antimicrobial agents in the food industry, and as a potential drug candidate for replacing antibiotics in order to treat multiple drugs resistance pathogens. However, the prevalence of virulence factors and antibiotic-resistance genes and the ability to cause disease could compromise their application in food, human and animal health. From the current regulatory point of view, the genus Enterococcus is neither recommended for the QPS list nor have GRAS status. Although recent advances in molecular biology and the recommended methods for the safety evaluation of Enterococcus strains allowed the distinction between commensal and clinical clades, development of highly adapted methods and legislations are still required. In the present review, we evaluate some aspects of Enterococcus spp. related to their probiotic properties and safety concerns as well as the current and potential application in food systems and treatment of infections. The regulatory status of commensal Enterococcus candidates for food, feed, probiotic use, and recommended methods to assess and ensure their safety are also discussed.

show abstract

“…Enterococci can be found in food products such as untreated milk, cheese, meat [ 15 , 46 ], and plant products (fermented vegetables) [ 79 ]. Their presence in some products is considered desirable.…”

Section: Enterococci As Probioticsmentioning

confidence: 99%

The Many Faces of Enterococcus spp.—Commensal, Probiotic and Opportunistic Pathogen

Krawczyk

Wityk

Gałęcka³

et al. 2021

Microorganisms

200

View full text Add to dashboard Cite

Enterococcus spp. are Gram-positive, facultative, anaerobic cocci, which are found in the intestinal flora and, less frequently, in the vagina or mouth. Enterococcus faecalis and Enterococcus faecium are the most common species found in humans. As commensals, enterococci colonize the digestive system and participate in the modulation of the immune system in humans and animals. For many years reference enterococcal strains have been used as probiotic food additives or have been recommended as supplements for the treatment of intestinal dysbiosis and other conditions. The use of Enterococcus strains as probiotics has recently become controversial due to the ease of acquiring different virulence factors and resistance to various classes of antibiotics. Enterococci are also seen as opportunistic pathogens. This problem is especially relevant in hospital environments, where enterococcal outbreaks often occur. Their ability to translocate from the gastro-intestinal tract to various tissues and organs as well as their virulence and antibiotic resistance are risk factors that hinder eradication. Due to numerous reports on the plasticity of the enterococcal genome and the acquisition of pathogenic microbial features, we ask ourselves, how far is this commensal genus from acquiring pathogenicity? This paper discusses both the beneficial properties of these microorganisms and the risk factors related to their evolution towards pathogenicity.

show abstract

Enterococcus olivae sp. nov., isolated from Spanish-style green-olive fermentations

Cited by 19 publications

References 32 publications

Computational and experimental analysis of organic degradation positively regulated by bioelectrochemistry in an anaerobic bioreactor system

Computational and experimental analysis of organic degradation positively regulated by bioelectrochemistry in an anaerobic bioreactor system

The Genus Enterococcus: Between Probiotic Potential and Safety Concerns—An Update

The Many Faces of Enterococcus spp.—Commensal, Probiotic and Opportunistic Pathogen

Contact Info

Product

Resources

About