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Microorganisms
Special Issues
Accelerated Topics in Public Health Microbiology and Microbial Food Safety
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Accelerated Topics in Public Health Microbiology and Microbial Food Safety

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1215

Special Issue Editor

Dr. Aliyar Fouladkhah

E-Mail Website
Guest Editor
Public Health Microbiology Laboratory, Tennessee State University, Nashville, TN 37209, USA
Interests: food safety; food microbiology; antibiotic resistance; epidemiology; public health
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Microbial pathogens have a tremendous ability to move towards diversity and fitness through sophisticated mechanisms such as vertical and horizontal gene transfer mechanisms, biofilm formation, and quorum sensing. According to the U.S. Centers for Disease Control and Prevention and the World Health Organization, in a typical year, more than 3,000 Americans and as many as 420,000 individuals around the world lose their lives because of foodborne diseases alone. Additionally, as many as 1.7 million Americans experience sepsis-related hospitalizations, with an estimated 350,000 annual deaths caused by sepsis. These burdens could be directly linked to infections caused by pathogens of public health concern originating from food, environment, or by contact with humans and animals.

As such, ensuring the safety of the public against natural and anthropogenic pathogens of public health concern is a daunting task and a moving target, requiring innovative solutions and the implementation of preventive and evidence-based policies and regulations. The current Special Issue is dedicated to innovative and high-quality original laboratory studies, epidemiological research, commentary articles, and systematic reviews and meta-analyses. There is a special emphasis on microbial food safety, water safety, environmental health, the study of infectious diseases under a One Health model, and the investigation of climate-sensitive infectious diseases. 

Dr. Aliyar Fouladkhah
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

  • public health microbiology
  • microbial food safety
  • water safety
  • infectious disease
  • climate change

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

14 pages, 2372 KiB  
Article
Rapid Quantification of Salmonella Typhimurium in Ground Chicken Using Immunomagnetic Chemiluminescent Assay
by Sandhya Thapa, Niraj Ghimire and Fur-Chi Chen
Microorganisms 2025, 13(4), 871; https://doi.org/10.3390/microorganisms13040871 - 10 Apr 2025
Viewed by 378
Abstract
Many countries have established regulatory frameworks to monitor and mitigate Salmonella contamination in poultry products. The ability to rapidly quantify Salmonella is critical for poultry processors to facilitate early detection, implement corrective measures, and enhance product safety. This study aimed to develop an [...] Read more.
Many countries have established regulatory frameworks to monitor and mitigate Salmonella contamination in poultry products. The ability to rapidly quantify Salmonella is critical for poultry processors to facilitate early detection, implement corrective measures, and enhance product safety. This study aimed to develop an Immunomagnetic Chemiluminescent Assay (IMCA) for the quantification of Salmonella Typhimurium in ground chicken. Immunomagnetic microbeads functionalized with monoclonal antibodies were employed to selectively capture and concentrate Salmonella from ground chicken samples. A biotin-labeled monoclonal antibody, followed by an avidin-horseradish peroxidase conjugate, was used to bind the captured bacteria and initiate a chemiluminescent reaction catalyzed by peroxidase. Light emission was quantified in relative light units (RLUs) using two luminometers. Ground chicken samples were inoculated with a four-strain S. Typhimurium cocktail ranging from 0 to 3.5 Log CFU/g. Bacterial concentrations were confirmed using the Most Probable Number (MPN) method. Samples underwent enrichment in Buffered Peptone Water (BPW) supplemented with BAX MP Supplement at 42 °C for 6 and 8 h before analysis via IMCA. A linear regression analysis demonstrated that the optimal quantification of Salmonella was achieved at the 8 h enrichment period (R2 ≥ 0.89), as compared to the 6 h enrichment. The limit of quantification (LOQ) was determined to be below 1 CFU/g. A strong positive correlation (R2 ≥ 0.88) was observed between IMCA and MPN results, indicating methodological consistency. These findings support the application of IMCA as a rapid and reliable method for the detection and quantification of Salmonella in ground chicken. Full article
(This article belongs to the Special Issue Accelerated Topics in Public Health Microbiology and Microbial Food Safety)
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14 pages, 1190 KiB  
Article
Synergetic Effect of Elevated Hydrostatic Pressure, Mild Heat, and Carvacrol on Inactivation of Nontyphoidal Salmonella Serovars in Buffered Environment
by Junice Sibley, Ranju Kafle, Shahid Chowdhury and Aliyar Cyrus Fouladkhah
Microorganisms 2025, 13(3), 498; https://doi.org/10.3390/microorganisms13030498 - 24 Feb 2025
Cited by 1 | Viewed by 595
Abstract
A four-strain mixture of nontyphoidal Salmonella and a strain of Salmonella Tennessee were exposed to elevated hydrostatic pressures of 350 and 650 MPa for 0 (control), 3, 5, and 10 min at temperatures of 4.4 and 60.0 °C with and without 0.2% carvacrol. [...] Read more.
A four-strain mixture of nontyphoidal Salmonella and a strain of Salmonella Tennessee were exposed to elevated hydrostatic pressures of 350 and 650 MPa for 0 (control), 3, 5, and 10 min at temperatures of 4.4 and 60.0 °C with and without 0.2% carvacrol. Treatments were conducted in PULSE tubes inside the chamber of the Hub880 Barocycler unit. In addition to microbial counts and for better assimilation of synergism of selected extrinsic factors of the study, linear (D-value) and non-linear (kmax) inactivation indices were calculated. A combination of mild heat, a low concentration of carvacrol, and mild pressure resulted in >5.0 log CFU/mL reduction (p < 0.05) in Salmonella serovars, surpassing the log reductions obtained by the current high-pressure processing industry standard. Salmonella Tennessee and the selected strain mixture exhibited comparable (p ≥ 0.05) sensitivity to pressure-based treatments, with D-values (350 MPa/4.4 °C) of 9.43 and 8.22 min, respectively. These values were reduced (p < 0.05) to 4.37 and 4.15 min, respectively, with the addition of 0.2% carvacrol to the pressure-based treatment. The application of mild heat at 60.0 °C and a low concentration of carvacrol showed microbiologically important synergism for augmenting the decontamination efficacy of high-pressure processing against nontyphoidal Salmonella serovars. Full article
(This article belongs to the Special Issue Accelerated Topics in Public Health Microbiology and Microbial Food Safety)
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