Capacity Of Lactic Acid Bacteria Research Articles

Comparison of in vitro and in situ antagonism assays as tools for the selection of bio-preservative lactic acid bacteria (LAB) in poultry meat

The study compared 3 antagonism assays, In vitro in broth culture (TSBYE) and In situ in sterile and raw chicken meat, as tools for LABs selection to bio-preserve poultry against Pseudomonas spoilage. To do this, 4 LABs (≈8 log CFU/mL or cm2) were inoculated with one P. fragi (≈3 log CFU/mL or cm2) on TSBYE or irradiated poultry, or alone on raw chicken meat (Pseudomonas spp. ≈3 log CFU/cm2). Treatments were incubated at 8 °C along time (4–6 days). Bacterial counts were performed on selective agar.In vitro assay was technically easy to perform, but antagonistic LABs abilities observed, were not always consistent with those evidenced In situ. Assay on irradiated meat demonstrated a good predictive potential for LABs selection, but not to discharge them. The main disadvantage of both assays was that sensitivity of P. fragi not necessarily represented the sensitivity shown by Pseudomonas spp. within poultry microbiota. In contrast, trials on raw poultry showed the real bio-preservative capacity of LAB against Pseudomonas spp., but variability within replicates was high.In conclusion, assay on fresh poultry must always be performed to select bio-preservative LABs, while other experiments are useful for reducing the number of LABs to be assayed.

Secuenciación y evaluación del efecto antimicrobiano de bacterias acidolácticas frente a cepas de Salmonella Tiphymurium

La producción intensiva y extensiva de cerdo en Argentina y España respectivamente presenta factores productivos diferentes. Sin embargo, cuando se trata de amenazas ante patógenos, específicamente Salmonella, ambos se ven afectados. Salmonella es un patógeno común en los alimentos relacionado con las toxiinfecciones alimentarias que provoca graves problemas en la salud pública. Las bacterias acidolácticas, específicamente los géneros Lactobacillus y Pediococcus se han caracterizado en los últimos años por tener gran importancia como antagonistas de diferentes bacterias patógenas. Una alternativa de control es la aplicación de Lactobacillus a lo largo de la cadena productiva de cerdo, evitando así la llegada de este patógeno a los consumidores. Se realizó una evaluación preliminar de la capacidad antagónica de bacterias acidolácticas identificadas tras secuenciación como Lactobacillus plantarum y Pediococcus acidilactici ante Salmonella Tiphymurium aislada de producción intensiva de cerdo de Argentina y Salmonella Tiphymurium aislada de producción extensiva de cerdo en España. Los resultados obtenidos reflejaron una alta capacidad antimicrobiana de las BAL seleccionadas ante ambas cepas patógenas (93.75%). De esta manera, se proponen como potenciales bacterias biopreservadoras en la producción de carne de cerdo y subproductos.

Long-chain vitamin K2 production in Lactococcus lactis is influenced by temperature, carbon source, aeration and mode of energy metabolism

BackgroundVitamin K2 (menaquinone, MK-n) is a lipid-soluble vitamin that functions as a carboxylase co-factor for maturation of proteins involved in many vital physiological processes in humans. Notably, long-chain vitamin K2 is produced by bacteria, including some species and strains belonging to the group of lactic acid bacteria (LAB) that play important roles in food fermentation processes. This study was performed to gain insights into the natural long-chain vitamin K2 production capacity of LAB and the factors influencing vitamin K2 production during cultivation, providing a basis for biotechnological production of vitamin K2 and in situ fortification of this vitamin in food products.ResultsWe observed that six selected Lactococcus lactis strains produced MK-5 to MK-10, with MK-8 and MK-9 as the major MK variant. Significant diversities between strains were observed in terms of specific concentrations and titres of vitamin K2. L. lactis ssp. cremoris MG1363 was selected for more detailed studies of the impact of selected carbon sources tested under different growth conditions [i.e. static fermentation (oxygen absent, heme absent); aerobic fermentation (oxygen present, heme absent) and aerobic respiration (oxygen present, heme present)] on vitamin K2 production in M17 media. Aerobic fermentation with fructose as a carbon source resulted in the highest specific concentration of vitamin K2: 3.7-fold increase compared to static fermentation with glucose, whereas aerobic respiration with trehalose resulted in the highest titre: 5.2-fold increase compared to static fermentation with glucose. When the same strain was applied to quark fermentation, we consistently observed that altered carbon source (fructose) and aerobic cultivation of the pre-culture resulted in efficient vitamin K2 fortification in the quark product.ConclusionsWith this study we demonstrate that certain LAB strains can be employed for efficient production of long-chain vitamin K2. Strain selection and optimisation of growth conditions offer a viable strategy towards natural vitamin K2 enrichment of fermented foods, and to improved biotechnological vitamin K2 production processes.

Effect of selenium supplements on the antioxidant activity and nitrite degradation of lactic acid bacteria.

Selenium (Se) is one of the essential trace elements in the human body, and Se-enriched lactic acid bacteria (LAB) can improve the biological utilization value of inorganic Se. The aim of this study was to isolate Se-enriched LAB and study their effects on antioxidant activity and nitrite degradation. The Se-enriched LAB L.P2, which was nitrite-tolerant and could grow in 30µg/mL sodium selenite (Na2SeO3) medium, was isolated from the traditional fermented Chinese sauerkraut. L.P2 belonged to Lactobacillus plantarum according to the 16S rDNA analysis. The biomass and lactic acid production of L.P2 reached to a maximum (9.52 log CFU/mL and 16.99mg/mL) when 2.0µg/mL Na2SeO3 was supplemented in the medium. Additionally, the nitrite degradation rate reached 85.76% when the initial concentration of Na2SeO3 was 2.0µg/mL. The Se-enriched LAB enhanced the scavenging capacity of hydroxyl radical and superoxide free radical of L.P2 and improved the lipid peroxidation and ion-chelating abilities. Moreover, the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in Se 4 group (4.0µg/mL Na2SeO3 was added) reached 48.49 and 50.35U/mg, respectively. Thus, Se 4 concentration was significantly higher than that of Se 0 group (with no Se added). In particular, SOD and GSH-Px enzymes correlated with nitrite degradation (P < 0.01). Collectively, our results indicate that Se supplementation can enhance the antioxidant capacity of LAB, contribute to its nitrite degradation, and thus may have potential applications in functional foods.

Bebida fermentada elaborada con bacterias ácido lácticas aisladas del pozol tradicional chiapaneco

El lactosuero es uno de los principales residuos de la industria quesera, toda vez que contiene nutrientes de alta calidad (lactosa 4.5 %, proteínas solubles 0.7 % y compuestos bioactivos), lo que lo hace una buena fuente para la fermentación por medio de bacterias ácido lácticas (BAL). En Chiapas, existen bebidas fermentadas típicas, una de ellas es el pozol, la cual contiene gran cantidad de microorganismos benéficos. El objetivo de esta investigación fue establecer la capacidad de fermentación de bacterias ácido lácticas, provenientes del pozol chiapaneco fermentado, para elaborar una bebida a base de lactosuero, adicionada con mermelada de sabor a piña-coco, y evaluar su potencial probiótico y su aceptación organaléptica. Se aislaron e identificaron BAL provenientes de pozol, y se seleccionaron las de mayor capacidad fermentativa y potencial probiótico. La evaluación organoléptica se realizó con 20 jueces no entrenados, con edades de entre 14 y 20 años. Las pruebas bioquímicas y el potencial probiótico demostraron que el pozol fermentado contenía bacterias benéficas para el consumo humano, por lo que se consideró una bebida probiótica. La bebida fermentada obtenida con cepa de pozol presentó el mayor nivel de agrado (P &lt; 0.05) y 2 x 107 UFC/mL. Los resultados de este estudio abren la posibilidad de la utilización del lactosuero para la elaboración de bebidas fermentadas ricas en probióticos y con buena aceptación organoléptica.

Review on the study of health effects of some fermented foods consumed on Côte d'Ivoire

Traditionally produced starchy foods and fermented beverages contribute to the diet of people. The benefits of these fermented traditional foods for and their nutritional quality are poorly known. This review gives a synoptic view of some fermented foods consumed in Cote d'Ivoire. Several foods are fermented traditionally, including cereals (maize, millet and sorghum), tubers (cassava), fruits (cocoa beans), palm sap (bandji) and fish (Galeoides decadactylus, Oreochromis niloticus). These fermented foods have varying qualities. Lactic acid bacteria are the main microorganisms of their fermentations. Beyond their nutritional quality, fermented foods and fermentation actors may have other health effects. The survival capacity of lactic acid bacteria at the conditions encountered in the digestive tract and their effect on the maintenance of the integrity of the digestive tract are particularly interesting. This review focuses on the benefits of fermented foods including nutritional aspects, benefits and lactic microflora that occurs during spontaneous fermentations as well as their probiotic effects will also be examined.

베트남인 분변 및 김치로부터 분리된 유산균의 프로바이오틱스 기능성 연구

The purpose of this study was to investigate the probiotic properties and antioxidant capacity of lactic acid bacteria isolated from Vietnamese feces and the Korean traditional food kimchi. Six isolated strains were identified as Lactobacillus sp. by 16S rRNA sequencing. All strains showed good resistance to low pH (1.5, 2.0, and 3.0) and 0.3% oxgall bile acids. Culture filtrates from the six strains showed various antioxidant effects, including DPPH, ABTS, reducing power, and metal chelating (Fe2+) activities. Two of the six Lactobacillus strains showed potential probiotic activity. Heat resistance and adhesion assays were conducted by mixing the selected strains, Lactobacillus acidophilus V4, Lactobacillus plantarum V7, and Lactobacillus paracasei DK121 isolated from kimchi. The results showed that the heat resistance of these strains was similar to that of a commercial strain, L. plantarum LP. In addition, a mucin attachment assay using the mixture of selected strains (V4, V7, and DK121) showed high binding activity to the mucous layer. In conclusion, a mixture of V4, V7, and DK121 shows promising probiotic activity and may be useful for the development of health-related products.

Zearalenone adsorption capacity of lactic acid bacteria isolated from pigs.

The ability to adsorb zearalenone by five strain of lactic acid bacteria was evaluated: four strains of Lactobacillus spp. isolated from pig rectal swabs and one commercial strain (Lactobacillus rhamnosus). Several factors affecting the adsorption capacity were evaluated in order to improve the adsorption of the mycotoxin by bacteria. The stability of the zearalenone–bacteria complex was analyzed. In every case, bacterial adsorption capacity was higher than 40.0%. The strain showing the highest adsorption (68.2%) was selected for the following steps of this research. The adsorption percentages obtained after processing 6.5 and 7.5 mL MRS broth were 57.40% + 3.53 and 64.46% + 0.76, respectively. The stability of zearalenone–bacteria complex was evaluated by successively rinsing. In the first rinsing step 42.26% + 0.414 was still bound. In the second rinsing step 25.12% + 0.664 was still bound, whereas 15.82% + 0.675 remained in the pellet after the third rinse. Results obtained demonstrated that Lactic Acid Bacteria has capacity to adsorb zearalenone. Finally adsorption was increased using a higher volume of initial broth. These results could be used to design a new lyophilized powder for detoxification, using lactic acid bacteria as potential zearalenone adsorbents.

The potential of lactic acid bacteria to colonize biotic and abiotic surfaces and the investigation of their interactions and mechanisms.

Lactic acid bacteria (LAB) are a heterogeneous group of Gram-positive bacteria that comprise several species which have evolved in close association with humans (food and lifestyle). While their use to ferment food dates back to very ancient times, in the last decades, LAB have attracted much attention for their documented beneficial properties and for potential biomedical applications. Some LAB are commensal that colonize, stably or transiently, host mucosal surfaces, inlcuding the gut, where they may contribute to host health. In this review, we present and discuss the main factors enabling LAB adaptation to such lifestyle, including the gene reprogramming accompanying gut colonization, the specific bacterial components involved in adhesion and interaction with host, and how the gut niche has shaped the genome of intestine-adapted species. Moreover, the capacity of LAB to colonize abiotic surfaces by forming structured communities, i.e., biofilms, is briefly discussed, taking into account the main bacterial and environmental factors involved, particularly in relation to food-related environments. The vast spread of LAB surface-associated communities and the ability to control their occurrence hold great potentials for human health and food safety biotechnologies.

Capacity of lactic acid bacteria in immunity enhancement and cancer prevention.

Lactic acid bacteria are associated with the human gastrointestinal tract. They are important for maintaining the balance of microflora in the human gut. An increasing number of published research reports in recent years have denoted the importance of producing interferon-gamma and IgA for treatment of disease. These agents can enhance the specific and nonspecific immune systems that are dependent on specific bacterial strains. The mechanisms of these effects were revealed in this investigation, where the cell walls of these bacteria were modulated by the cytokine pathways, while the whole bacterial cell mediated the host cell immune system and regulated the production of tumor necrosis factors and interleukins. A supplement of highly active lactic acid bacteria strains provided significant potential to enhance host's immunity, offering prevention from many diseases including some cancers. This review summarizes the current understanding of the function of lactic acid bacteria immunity enhancement and cancer prevention.

Bile acid-lowering properties of Lactobacillus plantarum Sanriku–SU3 isolated from Japanese surfperch fish

Abstract In vitro bile acid-lowering capacity of lactic acid bacteria (LAB) strains (ten Lactobacillus plantarum , four Lactococcus lactis , and two Leuconostoc mesenteroides ) isolated from fermented fish and fish intestine were compared with those of type strains. Among the isolated strains, Lb. plantarum Sanriku–SU3, Lc. lactis Suzuki 8, and Ln. mesenteroides BF6, isolated from Japanese surfperch, Japanese seabass, and Korean rockfish, respectively, clearly showed bile acid-lowering capacity. Although Lc. lactis Suzuki 8 and Ln. mesenteroides BF6 showed activity on deoxycholic and taurocholic acid media, respectively, rather than glycocholic acid, Lb. plantarum Sanriku–SU3 showed the lowering capacity with all of the three cholic acids. These capacities were higher with heat-killed cells than live cells. Plasma cholesterol in mice fed heat-killed cells of Lb. plantarum Sanriku–SU3 tended to be low, while liver cholesterol and plasma glucose were lowered in mice fed live Sanriku–SU3 cells. These results suggest that live as well as heat-killed Lb. plantarum Sanriku–SU3 could ameliorate metabolic syndrome.

Role of microorganisms present in dairy fermented products in health and disease.

Role of microorganisms present in dairy fermented products in health and disease.

Surface Binding of Toxins and Heavy Metals by Probiotics

Removal of toxic metals and toxins using microbial biomass has been introduced as an inexpensive, new promising method on top of conventional methods for decontamination of food, raw material and concentrated. In this article the potential application of lactic acid bacteria and yeasts as the most familiar probiotics to eliminate, inactivate or reduce bioavailability of contamination in foods and feed has been reviewed. After fast glance to beneficial health effects and preservative properties of lactic acid bacteria, the mechanisms which explain antibacterial and antifungal efficiency as well as their antifungal metabolites are mentioned. Then the article has been focused on potential application of single strain or combination of lactic acid bacteria for removal of heavy metals (copper, lead, cadmium, chromium, arsenic), cyanotoxins (microcystin-LR, -RR, -LF) and mycotoxins (aflatoxin B1, B2, B2a, M1, M2, G1, G2, patulin, ochratoxin A, deoxynivalenol, fumonisin B1 and B2, 3-acetyldeoxynivalenol, deoxynivalenol, fusarenon, nivalenol, diacetoxyscirpenol, HT-2 and T-2 toxin, zearalenone and its derivative, etc) from aqueous solutions in vitro. Wherever possible the mechanism of decontamination and the factors influencing yield of removal are discussed. Some factors which can facilitate metal removal capacity of lactic acid bacteria including the strains, surface charge, pH, temperature, presence of other cations are introduced. The cell wall structure of lactic acid bacteria and yeasts are also introduced for further explanation of mechanism of action in complex binding of probiotic to contaminants and strength of mycotoxin- bacterium interaction.

Pediococcus acidilacticiUL5 andLactococcus lactisATCC 11454 are able to survive and express their bacteriocin genes under simulated gastrointestinal conditions

The aim of this work is to study the expression of stress genes and those involved in pediocin and nisin production in Pediococcus acidilactici UL5 and Lactococcus lactis ATCC11454 under simulated gastrointestinal (GI) physiological conditions. The two strains were fed to a dynamic GI model (TIM-1). Samples were taken from different compartments and analysed for strain survival as well as for the expression of pediocin PA-1 operon, nisin A production gene and stress genes using RT-qPCR. Ileal-delivered efflux showed a survival rate of 17 and 0·0007% for Ped.acidilactici and La.lactis, respectively. Pediocin operon genes from stressed cells were generally expressed at least at the same level as for unstressed cells. However, pedA is up-regulated in the effluent at 120 and 180min. Nisin A genes were always up-regulated with particularly in the stomach after 70min compared with control. Bacteriocin production of Ped.acidilactici UL5 and Lc.lactis ATCC 11454 are not affected by upper GI simulated conditions and thus could be considered as relevant probiotic candidates. This study demonstrates the capacity of lactic acid bacteria to survive and express their bacteriocins genes under simulated GI conditions.

Isolation and Identification of Microorganisms Including Lactic Acid Bacteria and Their Use in Microbial Deacidification of Wines from Domestic Vineyards

The aim of this study was to identify various bacteria isolated from grapes and their wines. Additionally we investigated the capacity of lactic acid bacteria for microbiological deacidification of wines produced in Poland. We have identified Oenococcus oeni, Lactobacillus acidophilus and Lactobacillus delbrueckii. During the microbial deacidification process, we observed decreases of total acidity and increases of volatile acidity, with statistically significant changes noted for O. oeni in Marechal Foch and Seyval Blanc, and for Lb. acidophilus in Frontenac. On the other hand, a statistically significant increase in pH was observed in Marechal Foch and Seyval Blanc following deacidification by O. oeni.

Growth, acid production and bacteriocin production by probiotic candidates under simulated colonic conditions

The aim of this study is to evaluate the capacity of three bacteriocin producers, namely Lactococcus lactis subsp. lactis biovar diacetylactis UL719 (nisin Z producer), L. lactis ATCC 11454 (nisin A producer) and Pediococcus acidilactici UL5 (pediocin PA-1 producer), and to grow and produce their active bacteriocins in Macfarlane broth, which mimics the nutrient composition encountered in the human large intestine. The three bacteriocin-producing strains were grown in Macfarlane broth and in De Man-Rogosa-Sharpe (MRS) broth. For each strain, the bacterial count, pH drop and production of organic acids and bacteriocins were measured for different period of time. The ability of the probiotic candidates to inhibit Listeria ivanovii HPB 28 in co-culture in Macfarlane broth was also examined. Lactococcus lactis subsp. lactis biovar diacetylactis UL719, L. lactis ATCC 11454 and Ped. acidilactici UL5 were able to grow and produce their bacteriocins in MRS broth and in Macfarlane broth. Each of the three candidates inhibited L. ivanovii HPB 28, and this inhibition activity was correlated with bacteriocin production. The role of bacteriocin production in the inhibition of L. ivanovii in Macfarlane broth was confirmed for Ped. acidilactici UL5 using a pediocin nonproducer mutant. The data provide some evidence that these bacteria can produce bacteriocins in a complex medium with carbon source similar to those found in the colon. This study demonstrates the capacity of lactic acid bacteria to produce their bacteriocins in a medium simulating the nutrient composition of the large intestine.

Technological characterization and survival of the exopolysaccharide-producing strain Lactobacillus delbrueckii subsp. lactis 193 and its bile-resistant derivative 193+ in simulated gastric and intestinal juices

The capacity of lactic acid bacteria to produce exopolysaccharides (EPS) conferring microorganisms a ropy phenotype could be an interesting feature from a technological point of view. Progressive adaptation to bile salts might render some lactobacilli able to overcome physiological gut barriers but could also modify functional properties of the strain, including the production of EPS. In this work some technological properties and the survival ability in simulated gastrointestinal conditions of Lactobacillus delbrueckii subsp. lactis 193, and Lb. delbrueckii subsp. lactis 193+, a strain with stable bile-resistant phenotype derived thereof, were characterized in milk in order to know whether the acquisition of resistance to bile could modify some characteristics of the microorganism. Both strains were able to grow and acidify milk similarly; however the production of ethanol increased at the expense of the aroma compound acetaldehyde in milk fermented by the strain 193+, with respect to milk fermented by the strain 193. Both microorganisms produced a heteropolysaccharide composed of glucose and galactose, and were able to increase the viscosity of fermented milks. In spite of the higher production yield of EPS by the bile-resistant strain 193+, it displayed a lower ability to increase viscosity than Lb. delbrueckii subsp. lactis 193. Milk increased survival in simulated gastric juice; the presence of bile improved adhesion to the intestinal cell line HT29-MTX in both strains. However, the acquisition of a stable resistance phenotype did not improve survival in simulated gastric and intestinal conditions or the adhesion to the intestinal cell line HT29-MTX. Thus, Lb. delbrueckii subsp. lactis 193 presents suitable technological properties for the manufacture of fermented dairy products; the acquisition of a stable bile-resistant phenotype modified some properties of the microorganism. This suggests that the possible use of bile-resistant derivative strains should be carefully evaluated in each specific application considering the influence that the acquisition of a stable bile-resistant phenotype could have in survival ability in gastric and intestinal conditions and in technological properties.

Wine phenolic compounds influence the production of volatile phenols by wine-related lactic acid bacteria

To evaluate the effect of wine phenolic compounds on the production of volatile phenols (4-vinylphenol [4VP] and 4-ethylphenol [4EP]) from the metabolism of p-coumaric acid by lactic acid bacteria (LAB). Lactobacillus plantarum, Lactobacillus collinoides and Pediococcus pentosaceus were grown in MRS medium supplemented with p-coumaric acid, in the presence of different phenolic compounds: nonflavonoids (hydroxycinnamic and benzoic acids) and flavonoids (flavonols and flavanols). The inducibility of the enzymes involved in the p-coumaric acid metabolism was studied in resting cells. The hydroxycinnamic acids tested stimulated the capacity of LAB to synthesize volatile phenols. Growth in the presence of hydroxycinnamic acids, especially caffeic acid, induced the production of 4VP by resting cells. The hydroxybenzoic acids did not significantly affect the behaviour of the studied strains. Some of the flavonoids showed an effect on the production of volatile phenols, although strongly dependent on the bacterial species. Relatively high concentrations (1 g l(-1) ) of tannins inhibited the synthesis of 4VP by Lact. plantarum. Hydroxycinnamic acids were the main compounds stimulating the production of volatile phenols by LAB. The results suggest that caffeic and ferulic acids induce the synthesis of the cinnamate decarboxylase involved in the metabolism of p-coumaric acid. On the other hand, tannins exert an inhibitory effect. This study highlights the capacity of LAB to produce volatile phenols and that this activity is markedly influenced by the phenolic composition of the medium.

Antibacterial Activity of Lactic Acid Bacteria Isolated from Salad Vegetables

To determine the inhibitory capacity of lactic acid bacteria (LAB) due to the action of antagonistic substances, 8 members of the LAB group namely, Lactobacillus brevis, Lactobacillus casei, Lactobacillus cellebiosuis, Lactobacillus delbruesckii, Lactobacillus fermentum, Lactobacillus plantarum, Leuconostoc mesenteroides and Pediococci sp were isolated from the surfaces of five salad vegetables. The cell free supernatants of the selected LAB were able to inhibit the growth of the indicator pathogens used in this study. The largest zone of inhibition (18 mm) was produced by L. delbruesckii, L. fermentum and Pediococc i sp. All isolates demonstrated activity and produced diacetyl, hydrogen peroxide and lactic acid to varying degrees and their peak production was found to be during the 48th h. L. cellebiosuis produced the highest amount of diacetyl (2.096 g/l). L. plantarum produced the highest amount of lactic acid (1.801 g/l), while Pediococci sp produced the highest amount of hydrogen peroxide (0.0029 g/l). The sensitivity of the indicator pathogens to these isolates was also investigated by the agar well diffusion method. Resistance was shown to at least two different classes of antibiotics by all the pathogens used. Keywords: salad vegetables, diacetyl, hydrogen peroxide, lactic acid, agar well diffusion

Evaluation of thermotolerant capacity of lactic acid bacteria isolated from commercial sausages and the effects of their addition on the quality of cooked sausages

The thermotolerant capacity of several lactic acid bacteria strains isolated from cooked commercial sausages was determined. Four strains were positively identified as Lactobacillus plantarum, Lactobacillus curvatus, Pediococcus pentosaceus and Pediococcus acidilacti, after surviving thermal treatment (70 °C during 60 minutes). Thermotolerant strains were inoculated in sausage batters before cooking in order to determine their effect on color, texture, acceptance and inhibition of Enterobacteria during 12 days at 8 °C. No significant effect of the inoculated strains was detected on color parameters. Textural profile parameters, cohesiveness and resilience, were not affected by the inoculation of thermotolerant lactic acid bacteria, but L. curvatus sausages resulted softer than the rest of the treatments. Samples inoculated with L. curvatus also obtained the lowest scores for the sensory attributes evaluated, with the remaining treatments causing no unfavorable effects on sausage acceptance. There was a reduction in enterobacterial counts after 12 days of cold storage in inoculated samples. The performance of inoculated lactic acid bacteria strains can be explained in a similar way as that of starter cultures in dry-fermented sausages, where the growth in nests impairs other pathogenic microorganisms present in the rest of the sausage, since environmental conditions and the early inoculation of these thermotolerant strains favor them to become the dominant flora.