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Microorganisms
Special Issues
New Insights into the Antibiotic Resistance of Aquatic Microorganisms
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New Insights into the Antibiotic Resistance of Aquatic Microorganisms

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Antimicrobial Agents and Resistance".

Deadline for manuscript submissions: 30 October 2024 | Viewed by 4401

Special Issue Editors

Dr. Elsa Dias

E-Mail Website
Guest Editor
Laboratory of Biology and Ecotoxicology, Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal
Interests: AMR mechanisms; AMR gene dissemination; genome background of AMR genes; genetic diversity; resistome; mobilome; prevent and overcoming AMR; One Health in the context of AMR
Dr. Manuela Caniça

E-Mail Website
Guest Editor
Laboratory of Antibiotic Resistances and Health Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal
Interests: AMR mechanisms; AMR gene dissemination; genome background of AMR genes; genetic diversity; resistome; mobilome; prevent and overcoming AMR; One Health in the context of AMR
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit your research work to this Special Issue, “New insights into the antibiotic resistance of aquatic microorganisms”, in the Microorganisms section “Antimicrobial Agents and Resistance”.

Natural environments are considered important reservoirs of antibiotics and antibiotic resistance genes (ARGs), which may be relevant for the emergence and dissemination of antibiotic resistance among pathogenic and environmental bacteria. Horizontal gene transfer has a crucial role in the spread of ARGs, as these may be located in mobile genetic units. Increasing attention has been given to aquatic environments, with new perspectives being explored, such as the study of cyanobacteria as new players in the freshwater resistome or the role of mollusk pathogenic and commensal bacteria in the aquaculture resistome. Antibiotics resistance is currently approached from the One Health perspective; however, the environmental resistome is far from being fully understood.

This Special Issue aims to gather original research articles and reviews that allow us to better understand the role of aquatic microorganisms in the environmental resistome. All contributions within this discussed scope are welcome. We are particularly interested in papers with new research perspectives regarding antibiotic resistance in native and commensal and pathogenic bacteria from water environments.

Research areas may include (but are not limited to) the following:

  • Antibiotic resistance phenotype and genotype of microorganisms from aquatic environments (freshwater, seawater, aquaculture, wastewaters).
  • Factors contributing to antibiotic resistance in aquatic environments, such as antibiotic residues.
  • Antibiotic resistance in water environments vs. the One Health approach.

We look forward to receiving your contributions.

Dr. Elsa Dias
Dr. Manuela Caniça
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at mdpi.longhoe.net 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

  • antibiotic susceptibility
  • antibiotic resistance genes
  • One Health
  • cyanobacteria
  • commensal bacteria
  • pathogenic bacteria
  • aquatic resistome
  • freshwater
  • aquaculture
  • sea

Published Papers (3 papers)

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Research

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18 pages, 3409 KiB  
Article
Impact of Prophylactic Antibiotic Use in Ornamental Fish Tanks on Microbial Communities and Pathogen Selection in Carriage Water in Hong Kong Retail Shops
by Chun Au-Yeung, Kit-Ling Lam, Man-Hay Choi, Ka-Wai Chan, Yu-Sum Cheung, Yat-Lai Tsui and Wing-Yin Mo
Microorganisms 2024, 12(6), 1184; https://doi.org/10.3390/microorganisms12061184 - 12 Jun 2024
Viewed by 645
Abstract
Antibiotics are routinely added to ornamental fish tanks for treating bacterial infection or as a prophylactic measure. However, the overuse or subtherapeutical application of antibiotics could potentially facilitate the selection of antibiotic resistance in bacteria, yet no studies have investigated antibiotic use in [...] Read more.
Antibiotics are routinely added to ornamental fish tanks for treating bacterial infection or as a prophylactic measure. However, the overuse or subtherapeutical application of antibiotics could potentially facilitate the selection of antibiotic resistance in bacteria, yet no studies have investigated antibiotic use in the retail ornamental fish sector and its impact on microbial communities. The present study analyzed the concentrations of twenty antibiotics in the carriage water (which also originates from fish tanks in retail shops) collected monthly from ten local ornamental fish shops over a duration of three months. The antibiotic concentrations were correlated with the sequenced microbial community composition, and the risk of resistance selection in bacteria was assessed. Results revealed that the detected concentrations of tetracyclines were the highest among samples, followed by fluoroquinolones and macrolides. The concentrations of oxytetracycline (44.3 to 2,262,064.2 ng L−1) detected across three months demonstrated a high risk for resistance selection at most of the sampled shops. Zoonotic pathogens (species of Rhodococcus, Legionella, and Citrobacter) were positively correlated with the concentrations of oxytetracycline, tetracycline, chlortetracycline, and enrofloxacin. This suggests that antibiotic use in retail shops may increase the likelihood of selecting for zoonotic pathogens. These findings shed light on the potential for ornamental fish retail shops to create a favorable environment for the selection of pathogens with antibiotics, thereby highlighting the urgent need for enhanced antibiotic stewardship within the industry. Full article
(This article belongs to the Special Issue New Insights into the Antibiotic Resistance of Aquatic Microorganisms)
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20 pages, 1595 KiB  
Article
Antimicrobial Resistance Risk Assessment of Vibrio parahaemolyticus Isolated from Farmed Green Mussels in Singapore
by Hong Ming Glendon Ong, Yang Zhong, Chengcheng Hu, Kar Hui Ong, Wei Ching Khor, Joergen Schlundt and Kyaw Thu Aung
Microorganisms 2023, 11(6), 1498; https://doi.org/10.3390/microorganisms11061498 - 5 Jun 2023
Cited by 1 | Viewed by 1625
Abstract
Vibrio parahaemolyticus, commonly found in seafood products, is responsible for gastroenteritis resulting from the consumption of undercooked seafood. Hence, there is a need to characterize and quantify the risk involved from this pathogen. However, there has been no study reporting the quantification [...] Read more.
Vibrio parahaemolyticus, commonly found in seafood products, is responsible for gastroenteritis resulting from the consumption of undercooked seafood. Hence, there is a need to characterize and quantify the risk involved from this pathogen. However, there has been no study reporting the quantification of hemolytic antimicrobial-resistant (AMR) Vibrio parahaemolyticus in locally farmed shellfish in Singapore. In this study, ampicillin, penicillin G, tetracycline resistant, and non-AMR hemolytic V. parahaemolyticus were surveyed and quantified in green mussel samples from different premises in the food chain (farm and retail). The occurrence data showed that 31/45 (68.9%) of farmed green mussel samples, 6/6 (100%) farm water samples, and 41/45 (91.1%) retail shellfish samples detected the presence of hemolytic V. parahaemolyticus. V. parahaemolyticus counts ranged from 1.6–5.9 Log CFU/g in the retail shellfish samples and 1.0–2.9 Log CFU/g in the farm water samples. AMR risk assessments (ARRA), specifically for ampicillin, penicillin G, tetracycline, and hemolytic (non-AMR) scenarios were conducted for the full farm-to-home and partial retail-to-home chains. The hemolytic ARRA scenario estimated an average probability of illness of 5.7 × 10−3 and 1.2 × 10−2 per serving for the full and partial chains, respectively, translating to 165 and 355 annual cases per total population or 2.9 and 6.2 cases per 100,000 population, respectively. The average probability of illness per year ratios for the three ARRAs to the hemolytic ARRA were 0.82, 0.81, and 0.47 (ampicillin, penicillin G, and tetracycline, respectively) for the full chain and 0.54, 0.39, and 0.09 (ampicillin, penicillin G, and tetracycline, respectively) for the partial chain. The sensitivity analysis showed that the overall cooking effect, initial concentrations of pathogenic V. parahaemolyticus, and harvest duration and harvest temperature were key variables influencing the risk estimates in all of the modelled ARRAs. The study findings can be used by relevant stakeholders to make informed decisions for risk management that improve food safety. Full article
(This article belongs to the Special Issue New Insights into the Antibiotic Resistance of Aquatic Microorganisms)
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Review

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20 pages, 1885 KiB  
Review
Benefits and Challenges of Applying Bacteriophage Biocontrol in the Consumer Water Cycle
by Brandon Reyneke, Benjamin Havenga, Monique Waso-Reyneke, Sehaam Khan and Wesaal Khan
Microorganisms 2024, 12(6), 1163; https://doi.org/10.3390/microorganisms12061163 - 7 Jun 2024
Viewed by 694
Abstract
Bacteria (including disinfection- and antibiotic-resistant bacteria) are abundant in the consumer water cycle, where they may cause disease, and lead to biofouling and infrastructure damage in distributions systems, subsequently resulting in significant economic losses. Bacteriophages and their associated enzymes may then offer a [...] Read more.
Bacteria (including disinfection- and antibiotic-resistant bacteria) are abundant in the consumer water cycle, where they may cause disease, and lead to biofouling and infrastructure damage in distributions systems, subsequently resulting in significant economic losses. Bacteriophages and their associated enzymes may then offer a biological control solution for application within the water sector. Lytic bacteriophages are of particular interest as biocontrol agents as their narrow host range can be exploited for the targeted removal of specific bacteria in a designated environment. Bacteriophages can also be used to improve processes such as wastewater treatment, while bacteriophage-derived enzymes can be applied to combat biofouling based on their effectiveness against preformed biofilms. However, the host range, environmental stability, bacteriophage resistance and biosafety risks are some of the factors that need to be considered prior to the large-scale application of these bacterial viruses. Characteristics of bacteriophages that highlight their potential as biocontrol agents are thus outlined in this review, as well as the potential application of bacteriophage biocontrol throughout the consumer water cycle. Additionally, the limitations of bacteriophage biocontrol and corresponding mitigation strategies are outlined, including the use of engineered bacteriophages for improved host ranges, environmental stability and the antimicrobial re-sensitisation of bacteria. Finally, the potential public and environmental risks associated with large-scale bacteriophage biocontrol application are considered, and alternative applications of bacteriophages to enhance the functioning of the consumer water cycle, including their use as water quality or treatment indicators and microbial source tracking markers, are discussed. Full article
(This article belongs to the Special Issue New Insights into the Antibiotic Resistance of Aquatic Microorganisms)
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