Tigecycline has good broad-spectrum activity against many gram-positive and gram-negative pathogens with the notable exception of the PROTEEAE: A study was performed to identify the mechanism responsible for the reduced susceptibility to tigecycline in Proteus mirabilis. Two independent transposon insertion mutants of P. mirabilis that had 16-fold-increased susceptibility to tigecycline were mapped to the acrB gene homolog of the Escherichia coli AcrRAB efflux system. Wild-type levels of decreased susceptibility to tigecycline were restored to the insertion mutants by complementation with a clone containing a PCR-derived fragment from the parental wild-type acrRAB efflux gene cluster. The AcrAB transport system appears to be associated with the intrinsic reduced susceptibility to tigecycline in P. mirabilis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC151746 | PMC |
| http://dx.doi.org/10.1128/AAC.47.2.665-669.2003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Antibiotic Susceptibility Patterns and Virulence Profiles of Classical and Hypervirulent Strains Isolated from Clinical Samples in Khyber Pakhtunkhwa, Pakistan.
Pathogens
January 2025
Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK.
The emergence of hypervirulent and carbapenem-resistant hypermucoviscous strains presents a significant public health challenge due to their increased virulence and resistance to multiple antibiotics. This study evaluates the antibiotic susceptibility patterns and virulence profiles of classical and hypervirulent strains isolated from various clinical samples. A total of 500 clinical samples were collected from patients at the Mardan Medical Complex and Ayub Medical Complex in KPK between July 2022 and June 2024.
View Article and Find Full Text PDFActivity of Aztreonam-avibactam and other β-lactamase inhibitor combinations against Gram-negative bacteria isolated from patients hospitalized with pneumonia in United States medical centers (2020-2022).
BMC Pulm Med
January 2025
Element Iowa City (JMI Laboratories), 345 Beaver Kreek Centre, Suite A North Liberty, Iowa, IA, 52317, USA.
Background: Initial antimicrobial therapy for pneumonia is frequently empirical and resistance to antimicrobial agents represents a great challenge to the treatment of patients hospitalized with pneumonia. We evaluated the frequency and antimicrobial susceptibility of Gram-negative bacteria causing pneumonia in US hospitals.
Methods: Bacterial isolates were consecutively collected (1/patient) from patients hospitalized with pneumonia and the susceptibility of Gram-negative bacilli (3,911 Enterobacterales and 2,753 non-fermenters) was evaluated by broth microdilution in a monitoring laboratory.
Pathogenic characterization and drug resistance of neonatal sepsis in China: a systematic review and meta-analysis.
Eur J Clin Microbiol Infect Dis
January 2025
Neonatal Department of Longyan Division, Tianjin Children's Hospital, Tianjin University Children's Hospital, Tianjin, China.
Objectives: Neonatal sepsis is one of the causes of neonatal mortality and bacterial resistance to antibiotics is one of the challenges facing NICU. The aim of this study was to provide a basis for empirical antibiotic selection by comprehensively searching Chinese and non-Chinese databases for studies related to neonatal sepsis pathogenesis conducted in China and synthesizing all the results of the studies conducted in hospitals in China during the period under study METHODS: In this study, we conducted extensive searches of Pubmed, Web of Science, Cochrane, China Biology Medicine disc (SinoMed), China National Knowledge Infrastructure (CNKI) and Wanfang Data. We screened studies published from 2014 to 2023 that were conducted in hospitals in mainland China and involved bacterial blood cultures and susceptibility tests in neonates with neonatal sepsis and extracted the data, which were summarized using Stata 18.
View Article and Find Full Text PDFTwo case reports of biliary stent infections by extensively drug-resistant Escherichia coli carrying bla at a tertiary-care hospital in West Bengal, India.
Mol Biol Rep
January 2025
Department of Biomedical Laboratory Science and Management, Vidyasagar University, Midnapore, West Bengal, 721102, India.
Background: Rising antimicrobial resistance (AMR) is an acute public health emergency impeding the clinical efficacy of surgical interventions. Biliary stent placement is one of the routine surgical procedures that rarely lead to infections that are empirically managed by broad-spectrum β-lactams and fluoroquinolones. Critical priority pathogens, such as carbapenem-resistant Escherichia coli challenge treatment outcomes and infection prevention.
View Article and Find Full Text PDFPrevalence and characterization of IncQ1α-mediated multi-drug resistance in Isolated from pigs in Kunming, Yunnan, China.
Front Microbiol
January 2025
Yunnan Joint International R&D Center of Veterinary Public Health, College of Veterinary Medicine, Yunnan Agricultural University, Kunming, China.
Background: is a conditionally pathogenic bacterium that is inherently resistant to polymyxin and tigecycline, largely due to antibiotic resistance genes (ARGs). These ARGs can be horizontally transferred to other bacteria, raising concerns about the Inc plasmid-mediated ARG transmission from , which poses a serious public health threat. This study aims to investigate the presence of Inc plasmid types in pig-derived in Kunming, Yunnan, China.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!