A5055832841- Probiotics and Fermented Foods
- Microbial Metabolites in Food Biotechnology
- Enzyme Production and Characterization
- Gut microbiota and health
- Food composition and properties
- Antibiotic Resistance in Bacteria
- Microbial Natural Products and Biosynthesis
- Mycotoxins in Agriculture and Food
- Listeria monocytogenes in Food Safety
- Fermentation and Sensory Analysis
- Potato Plant Research
- Microbial bioremediation and biosurfactants
- Antimicrobial Peptides and Activities
- Meat and Animal Product Quality
- Biochemical Analysis and Sensing Techniques
- Yersinia bacterium, plague, ectoparasites research
- Reproductive tract infections research
- Plant-Microbe Interactions and Immunity
- Iron Metabolism and Disorders
- Antibiotics Pharmacokinetics and Efficacy
- Plant Pathogens and Fungal Diseases
- Antibiotic Use and Resistance
- Food Safety and Hygiene
- Trace Elements in Health
- Pharmaceutical and Antibiotic Environmental Impacts
Tunis University
2013-2024
Tunis El Manar University
2013-2024
A total of 119 lactic acid bacteria (LAB) were isolated, by culture-dependant method, from rhizosphere samples olive trees and desert truffles evaluated for different biotechnological properties. Using the variability intergenic spacer 16S-23S 16S rRNA gene sequences, isolates identified as genera Lactococcus, Pediococcus, Lactobacillus, Weissella, Enterococcus . All strains showed proteolytic activity with variable rates 42% EPS producers, while only 10% ability to grow in 9% NaCl. In...
Streptomyces is the most frequently described genus of Actinomycetes, a producer biologically active secondary metabolites. Indeed, species produces about 70% antibiotics and 60% antifungal molecules used in agriculture. Our study was carried out with goal isolating identifying antimicrobial metabolites from misionensis V16R3Y1 isolated date palm rhizosphere (southern Tunisia). This strain presented broad range activity against Fusarium oxysporum, Aspergillus flavus, Penicillium expansum,...
Abstract Weissella strains have been reported to be useful in biotechnological and probiotic determinations, some of them are considered opportunistic pathogens. Given the widespread interest about antimicrobial susceptibilities, transmission resistances, virulence factors, there is little research available on such topics for . The aim this study was assess safety aspects potential 54 spp. from different environmental sources. Antibiotic susceptibility, hemolytic activity, horizontal...
Many pentachlorophenol- (PCP-) contaminated environments are characterized by low or elevated temperatures, acidic alkaline pH, and high salt concentrations. PCP-degrading microorganisms, adapted to grow prosper in these environments, play an important role the biological treatment of polluted extreme habitats. A bacterium was isolated from arid saline soil southern Tunisia enriched mineral salts medium supplemented with PCP as source carbon energy. Based on 16S rRNA coding gene sequence...
The research and the selection of novel probiotic strains from niches are receiving increased attention on their proclaimed health benefits to both humans animals. This study aimed evaluate functional properties Weissella arid land living-hosts select with cholesterol-lowering property in vitro vivo , for use as probiotics. They were assessed acid bile tolerance, antibiotic susceptibility, membrane properties, antibacterial activity, antiadhesive effect against pathogens host cell lines,...
Leuconostoc lactis AV1 strain isolated from a Tunisian avocado was characterized as dextran producer. The promoter P dsrLL and the gene encoding DsrLL dextransucrase responsible for synthesis were transcriptionally fused to mCherry coding generating pRCR20 plasmid. Upon plasmid transfer, both AV1n non-producing mesenteroides CM70 became red due expression of dsrLL-dsr-mrfp transcriptional fusion. Characterization polymers present in cultures supernatants revealed that encoded recombinant...
Bacterial Vaginosis (BV) is the most common lower genital tract disorder among women of reproductive age (pregnant and non-pregnant) a better knowledge Lactobacillus species richness in healthy infected vaginal microbiota needed to efficiently design probiotic products promote maintenance normal flora which will help prevent bacterial vaginosis.To evaluate compare diversity lactic acid pregnant with without BV.A pilot study was carried out during November-2014 March-2015 University Badji...
Tomatoes and tomato based-foods contain beneficial microorganisms various organic acids that have important nutritional values for human. The objective of this study was to access the physiochemical properties fermented tomatoes juices evaluate competitiveness lactic acid bacteria (LAB) against Listeria monocytogenes, innocua, Salmonella spp., in artificially contaminated juice. Microbial counting (LAB, fungi spp.) performed after fermentation weekly during storage. Different (Lactic,...
In this paper, we assessed the ability of two strains Saccharomyces cerevisiae, in viable and dead forms, to remove ochratoxin A (OTA) from an artificially contaminated synthetic grape juice medium (SGM) (10 µg OTA/L) a naturally (6.64 OTA/L). The first strain, named Levulin FB, is commercial yeast used making wine. second, SC5, autochthonous strain isolated table grapes. OTA concentrations juices before after their contact with cells were assessed. significant decrease level (p < 0.05)...
Frequency and Antibiotics Resistance of Extended-Spectrum Beta-Lactamase (ESBLs) Producing Escherichia coli Klebsiella pneumoniae Isolated from Patients in Gaza Strip, Palestine
The impact of wheat sourdough inoculated with a promising lactic acid bacterium Weissella confusa V20, isolated from Tunisian desert plant, on the quality characteristics and bread as well acrylamide formation was evaluated. W. V20 (SWc) did not provide high final acidity could effectively metabolize sucrose, resulting in significant (p < 0.05) increases glucose (44.5%) fructose (84.2%) levels. A substantial decrease free asparagine observed upon fermentation, reducing 16 ± 0.9 mg/100 g...
The use of lactic acid bacteria for developing functional foods is increasing their ability to synthesize beneficial metabolites such as vitamin B (riboflavin, RF) and postbiotic compounds. Here, the spontaneous mutant FS54 B2 was isolated by treatment dextran-producing Weissella confusa strain with roseoflavin. overproduced RF (4.9 mg/L) in synthetic medium. FMN riboswitch responsible regulation biosynthesis, sequencing coding DNA revealed that carries G131U mutation. retained capacity high...
This study aims to identify and determine the prevalence of Yersinia enterocolitica in ground beef meat during conservation process. In all, 180 sample-units from three red processing companies were subjected microbial analysis. The identification rate Y. performed using conventional culture methods molecular based on analysis rpoB gene. analytical method allowed detection 25 (14%) positive units 15 strains. Biogrouping classification assignment all isolates biotype 1A. However, assessment...