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ARGs and ARB in typical environments which exposed to antibiotics are prevalent.• Nanoparticle-and photosensitizer-related technology can clear specific ARGs or ARB.• CRISPR-Cas-and phage-related technology can eliminate particular ARGs or ARB.• Antibiotic combination can be used to eliminate microbial resistance.• Microbiome-specific technology can eradicate most types of ARGs or ARB in one shot. Antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB) in the environment pose serious threats to environmental security and public health. There is an urgent need for methods to specifically and effectively control environmental pollution or pathogen infection associated with ARGs and ARB. This review aims to provide an overview of methods abating the prevalence and spread of ARGs and ARB from species to community level. At the species level, species-specific technologies, such as nanoparticle-, photosensitizer-, CRISPR-Cas-, and phage-related technology can be utilized to clear a particular class of ARGs or ARB, and in combination with low-dose antibiotics, a higher removal efficiency can be achieved. Moreover, the combination of antibiotics can be used to reverse microbial resistance and treat recurrent antibiotic resistant pathogen infections. At the community level, community-specific strategies, such as biochar, hyperthermophilic compost, and fecal microbiota transplantation can eradicate most types of ARGs or ARB in one shot, reducing the probability of resistance development. Though some progress has been made to eliminate ARGs and ARB in disease treatment or decontamination scenarios, further research is still needed to elucidate their mechanisms of action and scopes of application, and efforts should be made to explore novel strategies to counter the prevalence of antibiotic resistance.
ARGs and ARB in typical environments which exposed to antibiotics are prevalent.• Nanoparticle-and photosensitizer-related technology can clear specific ARGs or ARB.• CRISPR-Cas-and phage-related technology can eliminate particular ARGs or ARB.• Antibiotic combination can be used to eliminate microbial resistance.• Microbiome-specific technology can eradicate most types of ARGs or ARB in one shot. Antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB) in the environment pose serious threats to environmental security and public health. There is an urgent need for methods to specifically and effectively control environmental pollution or pathogen infection associated with ARGs and ARB. This review aims to provide an overview of methods abating the prevalence and spread of ARGs and ARB from species to community level. At the species level, species-specific technologies, such as nanoparticle-, photosensitizer-, CRISPR-Cas-, and phage-related technology can be utilized to clear a particular class of ARGs or ARB, and in combination with low-dose antibiotics, a higher removal efficiency can be achieved. Moreover, the combination of antibiotics can be used to reverse microbial resistance and treat recurrent antibiotic resistant pathogen infections. At the community level, community-specific strategies, such as biochar, hyperthermophilic compost, and fecal microbiota transplantation can eradicate most types of ARGs or ARB in one shot, reducing the probability of resistance development. Though some progress has been made to eliminate ARGs and ARB in disease treatment or decontamination scenarios, further research is still needed to elucidate their mechanisms of action and scopes of application, and efforts should be made to explore novel strategies to counter the prevalence of antibiotic resistance.
Humans use dietary supplements for several intended effects, such as supplementing malnutrition. While these compounds have been developed for host end benefits, their ancillary impact on the gut microbiota remains unclear. The human gut has been proposed as a reservoir for the prevalent lateral transfer of antimicrobial resistance and virulence genes in bacteria through plasmid conjugation. Here, we studied the effect of dietary zinc supplements on the incidence of plasmid conjugation in vitro . Supplement effects were analyzed through standardized broth conjugation assays. The avian pathogenic Escherichia coli (APEC) strain APEC-O2-211 was a donor of the multidrug resistance plasmid pAPEC-O2-211A-ColV, and the human commensal isolate E. coli HS-4 was the plasmid-free recipient. Bacterial strains were standardized and mixed 1:1 and supplemented 1:10 with water, or zinc derived from either commercial zinc supplements or zinc gluconate reagent at varying concentrations. We observed a significant reduction in donors, recipients, and transconjugant populations in conjugations supplemented with zinc, with a dose-dependent relationship. Additionally, we observed a significant reduction ( P < 0.05) in log conjugation efficiency in zinc-treated reactions. Upregulation of the mRNA for the plasmid replication initiation gene repA and the subset of transfer genes M , J , E , K , B , P , C , W , U , N , F , Q , D , I , and X was observed. Furthermore, we observed a downregulation of the conjugal propilin gene traA and the entry exclusion gene traS . This study demonstrates the effect of dietary zinc supplements on the conjugal transfer of a multidrug resistance plasmid between pathogenic and commensal bacteria during in vitro conditions. IMPORTANCE This study identifies dietary zinc supplementation as a potential novel intervention for mitigating the emergence of multidrug resistance in bacteria, thus preventing antibiotic treatment failure and death in patients and animals. Further studies are required to determine the applicability of this approach in an in vivo model.
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