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Microorganisms
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Bacteria and Fungi Probiotics 2.0
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Bacteria and Fungi Probiotics 2.0

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Food Microbiology".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 1985

Special Issue Editor

Dr. Françoise Coucheney

E-Mail Website
Guest Editor
UMR Transfrontalière BioEcoAgro 1158, Université de Lille, Lille, France
Interests: bacteria and yeasts probiotics; antimicrobial peptides; cheese ecosystem; food biopreservation; animal health
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is a continuation of our 2023 Special Issue, "Bacteria and Fungi Probiotics”.

Antibiotic resistance is a global health problem. The increase in the number of microbial strains that have become resistant to antibiotics worldwide and the lack, in some cases, of new therapeutics is worrisome. To this day, the World Health Organization continually warns of this threat and encourages the development of new strategies and alternatives to antibiotics to combat drug resistance.

In general, probiotics are presented as a potential alternative to antibiotics to control and prevent the spread of pathogenic bacteria. Strains belonging to lactic acid bacteria such as Lactobacillus and Bifidobacterium are commonly used as probiotics. These bacteria can produce various antimicrobial agents, such as Bacteriocins, that exert strong antagonistic activity against different pathogenic microbes including Listeria monocytogenes, Escherichia coli, etc. Saccharomyces boulardii is the only commercially available probiotic yeast and is often used as a probiotic for countering intestinal inflammatory processes.

This Special Issue aims to collect research or review articles related to bacteria and fungi probiotics of different origin with a focus on the antimicrobial peptides (AMP) of probiotics.

We look forward to receiving your contributions.

Related International Congress:

OHID 2024 and Antimic 2024: Two congresses for a week dedicated to the One Health approach with applications in several areas (environmental health, plant health, animal health, human health) and the Bioproduction of Natural Antimicrobials, 24–28 June 2024, Lille, France

Dr. Françoise Coucheney
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Microorganisms is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bacteria
  • fungi
  • probiotics
  • antimicrobials
  • antioxidant
  • gut microbiota
  • gut immunomodulation
  • animal health
  • human health

Published Papers (2 papers)

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0 pages, 2495 KiB  
Article
Characterization and Assessment of Native Lactic Acid Bacteria from Broiler Intestines for Potential Probiotic Properties
by Xiaoxia Li, Wang Li, Longmei Zhao, Yuanxiao Li, Wanling He, Ke Ding and Pinghua Cao
Microorganisms 2024, 12(4), 749; https://doi.org/10.3390/microorganisms12040749 - 7 Apr 2024
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Abstract
Probiotics are the most promising alternative to antibiotics for improving animal production and controlling pathogenic infections, while strains derived from natural hosts are considered highly desirable due to their good adaptation to the gastrointestinal tract. The aim of this study was to screen [...] Read more.
Probiotics are the most promising alternative to antibiotics for improving animal production and controlling pathogenic infections, while strains derived from natural hosts are considered highly desirable due to their good adaptation to the gastrointestinal tract. The aim of this study was to screen Lactobacillus with broad-spectrum antibacterial activity from broilers fed an antibiotic-free diet and evaluate their potential as poultry probiotics. A total of 44 lactic acid bacteria (LAB) strains were isolated from the intestines of healthy broilers, among which 3 strains exhibited outstanding antimicrobial activity and were subsequently identified through 16S rRNA sequencing as Enterococcus faecium L8, Lactiplantibacillus plantarum L10, and Limosilactobacillus reuteri H11. These three isolates demonstrated potent bacteriostatic activity against Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Salmonella cholerae, with inhibition zones ranging from 15.67 ± 1.53 to 21.33 ± 0.58 mm. The selected LAB strains exhibited high tolerance to acid and bile salts, with L. reuteri H11 displaying the highest survival rate (ranging from 34.68% to 110.28%) after exposure to 0.3% (w/v) bile salts for 6 h or a low pH environment (pH 2, 2.5, and 3) for 3 h. Notably, L. reuteri H11 outperformed other strains in terms of hydrophobicity (84.31%), auto-aggregation (53.12%), and co−aggregation with E. coli ATCC 25922 (36.81%) and S. aureus ATCC 6538 (40.20%). In addition, the three LAB isolates were either fully or moderately susceptible to the tested antibiotics, except for strain L8, which resisted gentamycin and vancomycin. Consequently, these three LAB strains, especially L. reuteri H11, isolated from the intestines of broiler chickens, represent promising probiotic candidates that can be employed as feed additives to enhance production performance and control poultry pathogens. Full article
(This article belongs to the Special Issue Bacteria and Fungi Probiotics 2.0)
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Article
Impact of Dietary Regime and Seasonality on Hindgut’s Mycobiota Diversity in Dairy Cows
by Ali Sadek, Bernard Taminiau, Georges Daube, Panagiotis Sapountzis, Frédérique Chaucheyras-Durand, Mathieu Castex, Françoise Coucheney and Djamel Drider
Microorganisms 2024, 12(1), 84; https://doi.org/10.3390/microorganisms12010084 - 31 Dec 2023
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Abstract
We describe and discuss the intestinal mycobiota of dairy cows reared in France following variations in dietary regimes and two seasons. Two groups of 21 animals were followed over a summer and winter period, and another group of 28 animals was followed only [...] Read more.
We describe and discuss the intestinal mycobiota of dairy cows reared in France following variations in dietary regimes and two seasons. Two groups of 21 animals were followed over a summer and winter period, and another group of 28 animals was followed only during the same summer season. The summer diet was based on grazing supplemented with 3–5 kg/d of maize, grass silage and hay, while the winter diet consisted of 30% maize silage, 25% grass silage, 15% hay and 30% concentrate. A total of 69 DNA samples were extracted from the feces of these cows. Amplification and sequencing of the ITS2 region were used to assess mycobiota diversity. Analyses of alpha and beta diversity were performed and compared statistically. The mycobiota changed significantly from summer to winter conditions with a decrease in its diversity, richness and evenness parameters, while beta diversity analysis showed different mycobiota profiles. Of note, the Geotrichum operational taxonomic unit (OTU) was prevalent in the winter group, with a mean relative abundance (RA) of 65% of the total mycobiota. This Geotrichum OTU was also found in the summer group, but to a lesser extent (5%). In conclusion, a summer grazing diet allowed a higher fecal fungal diversity. These data show, for the first time, that a change in diet associated with seasonality plays a central role in shaping hindgut fungal diversity. Full article
(This article belongs to the Special Issue Bacteria and Fungi Probiotics 2.0)
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