Special Issue "Antimicrobial-Resistance of Food-Borne Pathogens"

A special issue of Antibiotics (ISSN 2079-6382).

Deadline for manuscript submissions: 30 September 2020.

Special Issue Editor

Dr. Pierluigi Di Ciccio
Website
Guest Editor
Department of Veterinary Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Torino, Italy
Interests: food microbiology; food safety; food hygiene; microbial biofilm; food borne pathogens; antimicrobial-resistance

Special Issue Information

Dear Colleagues,

The emergence of antimicrobial-resistance (AMR) in bacteria represents a major challenge for public health. The use, misuse, or indiscriminate use of antibiotics as therapeutic drugs in animal husbandry and plant health may contribute to the development of AMR in food-borne pathogens. There is growing concern over the possibility of AMR transmission via the food chain. Additionally, food processing environments could act as potential hotspots for AMR acquisition and spread. Indeed, biocide use and exposure to food‐related stresses could presumably act as selection pressures for increased microbial resistance to antibiotics. Monitoring of AMR in food-borne pathogens in food‐producing animals and their food products is crucial for understanding the development and diffusion of resistance, providing relevant risk assessment data, and evaluating targeted interventions. Currently, omics technologies are valuable tools to evaluate the dissemination and distribution of AMR of food-borne pathogens in the food chain. I invite authors to submit articles covering all aspects of this theme. Manuscripts concerning other related areas of interest are welcome, such as the following:

  1. The epidemiology and surveillance of AMR from farm to fork;
  2. The impact of biocide use and exposure to food-processing technologies on the prevalence of AMR in food-borne pathogens;
  3. Molecular approaches tools in order to investigate the AMR mechanism involved;
  4. The relationship between biofilm formation and AMR.

Dr. Pierluigi Di Ciccio
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 papers will be 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. Antibiotics 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 1600 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

  • antimicrobial-resistance
  • food-borne pathogens
  • food chain
  • food safety
  • omics
  • AMR control

Published Papers (3 papers)

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Research

Open AccessArticle
Antimicrobial Susceptibility Testing for Salmonella Serovars Isolated from Food Samples: Five-Year Monitoring (2015–2019)
Antibiotics 2020, 9(7), 365; https://doi.org/10.3390/antibiotics9070365 - 29 Jun 2020
Abstract
The continuous collection and analysis of updated data on the antimicrobic resistance among bacterial strains represent the essential core for the surveillance of this problem. The present work aimed to investigate the occurrence of antimicrobial resistance among Salmonella serovars isolated in foods in [...] Read more.
The continuous collection and analysis of updated data on the antimicrobic resistance among bacterial strains represent the essential core for the surveillance of this problem. The present work aimed to investigate the occurrence of antimicrobial resistance among Salmonella serovars isolated in foods in 2015–2019. A total of 178 Salmonella strains belonging to 39 serovars were tested against 10 antimicrobials. High proportions of Salmonella isolates were resistant to tetracycline (n = 53.9%), ciprofloxacin (n = 47.2%), ampicillin (n = 44.4%), nalidixic acid (n = 42.7%), and trimethoprim-sulfamethoxazole (n = 38.8%). Different resistance rates were recorded among the different serotypes of Salmonella, and S. Infantis, exhibited the highest resistance to antibiotics. A high percentage of strains isolated from poultry, pork, and bovine were resistant to at least one or two antimicrobials. Resistant and multidrug-resistant (MDR) strains were also recorded among the isolates from molluscan shellfish; however, the occurrence of resistant Salmonella strains isolated from this source was significantly lower compared with those reported for poultry, pork, and bovine. The high levels of resistance reported in the present study indicate a potential public health risk. Consequently, additional hygiene and antibiotic stewardship practices should be considered for the food industry to prevent the prevalence of Salmonella in foods. Full article
(This article belongs to the Special Issue Antimicrobial-Resistance of Food-Borne Pathogens)
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Open AccessArticle
Genotypic and Phenotypic Evaluation of Biofilm Production and Antimicrobial Resistance in Staphylococcus aureus Isolated from Milk, North West Province, South Africa
Antibiotics 2020, 9(4), 156; https://doi.org/10.3390/antibiotics9040156 - 02 Apr 2020
Cited by 1
Abstract
Background: Biofilm formation in S. aureus may reduce the rate of penetration of antibiotics, thereby complicating treatment of infections caused by these bacteria. The aim of this study was to correlate biofilm-forming potentials, antimicrobial resistance, and genes in S. aureus isolates. Methods [...] Read more.
Background: Biofilm formation in S. aureus may reduce the rate of penetration of antibiotics, thereby complicating treatment of infections caused by these bacteria. The aim of this study was to correlate biofilm-forming potentials, antimicrobial resistance, and genes in S. aureus isolates. Methods: A total of 64 milk samples were analysed, and 77 S. aureus were isolated. Results: Seventy (90.9%) isolates were biofilm producers. The ica biofilm-forming genes were detected among 75.3% of the isolates, with icaA being the most prevalent (49, 63.6%). The icaB gene was significantly (P = 0.027) higher in isolates with strong biofilm formation potentials. High resistance (60%–90%) of the isolates was observed against ceftriaxone, vancomycin, and penicillin, and 25 (32.5%) of S. aureus showed multidrug resistance (MDR) to at least three antibiotics. Five resistance genes, namely blaZ (29, 37.7%), vanC (29, 37.7%), tetK (24, 31.2%), tetL (21, 27.3%), and msrA/B (16, 20.8%) were detected. Most MDR phenotypes possessed at least one resistance gene alongside the biofilm genes. However, no distinct pattern was identified among the resistance and biofilm phenotypes. Conclusions: The high frequency of potentially pathogenic MDR S. aureus in milk samples intended for human consumption, demonstrates the public health relevance of this pathogen in the region. Full article
(This article belongs to the Special Issue Antimicrobial-Resistance of Food-Borne Pathogens)
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Open AccessArticle
Evaluation by Flow Cytometry of Escherichia coli Viability in Lettuce after Disinfection
Antibiotics 2020, 9(1), 14; https://doi.org/10.3390/antibiotics9010014 - 31 Dec 2019
Abstract
Foodborne outbreaks due to the consumption of ready-to-eat vegetables have increased worldwide, with Escherichia coli (E. coli) being one of the main sources responsible. Viable but nonculturable bacteria (VBNC) retain virulence even after some disinfection procedures and constitute a huge problem [...] Read more.
Foodborne outbreaks due to the consumption of ready-to-eat vegetables have increased worldwide, with Escherichia coli (E. coli) being one of the main sources responsible. Viable but nonculturable bacteria (VBNC) retain virulence even after some disinfection procedures and constitute a huge problem to public health due to their non-detectability through conventional microbiological techniques. Flow cytometry (FCM) is a promising tool in food microbiology as it enables the distinction of the different physiological states of bacteria after disinfection procedures within a short time. In this study, samples of lettuce inoculated with E. coli were subject to disinfection with sodium hypochlorite at free chlorine concentrations of 5, 10, 25, 50, and 100 mg·L−1 or with 35% peracetic acid at concentrations of 5, 10, 25, and 50 mg·L−1. The efficiency of these disinfectants on the viability of E. coli in lettuce was evaluated by flow cytometry with LIVE/DEAD stains. Results from this study suggest that FCM can effectively monitor cell viability. However, peracetic acid is more effective than sodium hypochlorite as, at half the concentration, it is enough to kill 100% of bacteria and always induces a lower percentage of VBNC. Finally, we can conclude that the recommended levels of chemical disinfectants for fresh fruit and vegetables are adequate when applied in lettuce. More importantly, it is possible to ensure that all cells of E. coli are dead and that there are no VBNC cells even with lower concentrations of those chemicals. These results can serve as guidance for lettuce disinfection, improving quality and the safety of consumption. Full article
(This article belongs to the Special Issue Antimicrobial-Resistance of Food-Borne Pathogens)
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