Although antibiotic resistance is a major issue for both human and animal health, very few studies have investigated the role of the bacterial host spectrum in its dissemination within natural ecosystems. Here, we assessed the prevalence of methicillin resistance among (MRSA) isolates from humans, non-human primates (NHPs), micromammals and bats in a primatology center located in southeast Gabon, and evaluated the plausibility of four main predictions regarding the acquisition of antibiotic resistance in this ecosystem. MRSA strain prevalence was much higher in exposed species (i.e., humans and NHPs which receive antibiotic treatment) than in unexposed species (micromammals and bats), and in NHP species living in enclosures than those in captivity-supporting the assumption that antibiotic pressure is a risk factor in the acquisition of MRSA that is reinforced by the irregularity of drug treatment. In the two unexposed groups of species, resistance prevalence was high in the generalist strains that infect humans or NHPs, supporting the hypothesis that MRSA strains diffuse to wild species through interspecific transmission of a generalist strain. Strikingly, the generalist strains that were not found in humans showed a higher proportion of MRSA strains than specialist strains, suggesting that generalist strains present a greater potential for the acquisition of antibiotic resistance than specialist strains. The host spectrum is thus a major component of the issue of antibiotic resistance in ecosystems where humans apply strong antibiotic pressure.
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http://dx.doi.org/10.3390/microorganisms11020393 | DOI Listing |
Mol Biotechnol
December 2024
Department of Biotechnology, University of Mianwali, Punjab, 42200, Pakistan.
In Salmonella Typhimurium, efflux pump proteins, such as AcrD actively expel drugs and hazardous chemicals from bacterial cells, resulting in treatment failure and the emergence of antibiotic-resistant variants. Focusing on AcrD may lead to the development of novel antimicrobials against multidrug-resistant bacteria. However, challenges persist in achieving high selectivity, low toxicity, and effective bacterial penetration.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Infectious Diseases and Tropical Medicine Research Center, Research Institute of Cellular and Molecular Sciences in Infectious Diseases, Zahedan University of Medical Sciences, Zahedan, 98167-43463, Iran.
Effluents containing antibiotics raise concerns due to their potential to promote or sustain bacterial resistance and disrupt essential cycles and processes critical to aquatic ecology, agriculture, and animal farming. Vancomycin is a glycopeptide antibiotic, recognized as the treatment for cases in which other antibiotics are unsuccessful. The efficient elimination of antibiotics plays a crucial role in managing antibiotic pollution.
View Article and Find Full Text PDFBMJ Open Qual
December 2024
Department of Microbiology, All India Institute of Medical Sciences, Patna, Bihar, India.
Background: Ventilator-associated pneumonia (VAP) is a prevalent nosocomial infection in the intensive care unit (ICU), significantly increasing patient morbidity, mortality, and healthcare costs. Effective management is essential, particularly in the context of antimicrobial resistance and the frequent use of antibiotics in ICUs.
Methods: This prospective pre-post interventional study was conducted in the medical ICU of a tertiary care centre, over 6 months.
Int J Antimicrob Agents
December 2024
Department of Surgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Section 3, Zhongyang Rd., Hualien, Taiwan; Department of Surgery, School of Medicine, Tzu Chi University, No. 701, Section 3, Zhongyang Rd., Hualien, Taiwan. Electronic address:
Phage-based decontamination has rarely been explored in real-world settings, particularly in the environments of patients undergoing extracorporeal membrane oxygenation (ECMO). This four-year prospective study aimed to evaluate the effectiveness of aerosolized phage cocktails tailored to combat target antibiotic-resistant species of Acinetobacter baumannii, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Stenotrophomonas maltophilia. The decontamination procedure with phage aerosols was proactively implemented before the admission of ECMO patients based on a thorough analysis of phage typing results from bacterial species isolated from prospective patient areas during the preceding two months.
View Article and Find Full Text PDFGene
December 2024
Biotechnology Division, Defence Research & Development Establishment, Jhansi Road, Gwalior-474002, MP, India. Electronic address:
Global reporting of antibiotic resistant bacteria (ARB) bearing antibiotic resistance genes (ARGs) have increased in the past decade. Sewage systems act as breeding grounds for these pathogens. Dumping of untreated sewage effluent in river water systems have aided in their dissemination and spread.
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