scholarly journals Detection of extended spectrum beta lactamases, ampc beta lactamases and metallobetalactamases in clinical isolates of ceftazidime resistant Pseudomonas Aeruginosa

2011 ◽  
Vol 42 (4) ◽  
pp. 1284-1288 ◽  
Author(s):  
Sivaraman Umadevi ◽  
Noyal M Joseph ◽  
Kandha Kumari ◽  
Joshy M Easow ◽  
Shailesh Kumar ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Clinical Isolates ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases

First Detection of OXA-10 Extended-Spectrum Beta-Lactamases and the Occurrence of mexR and nfxB in Clinical Isolates of Pseudomonas aeruginosa from Nigeria

Chemotherapy ◽  
2015 ◽  
Vol 61 (2) ◽  
pp. 87-92 ◽  
Author(s):  
Bamidele T. Odumosu ◽  
Bola A. Adeniyi ◽  
Ram Chandra
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Efflux Pump ◽  
Clinical Isolates ◽  
Beta Lactamases ◽  
First Report ◽  
Extended Spectrum ◽  
Pcr Rflp ◽  
Extended Spectrum Beta Lactamases ◽  
Regulator Genes

Background: The characterization of β-lactamase production in Pseudomonasaeruginosa is rarely reported in Nigeria. The objective of this study was to investigate the occurrence and characterize the different β-lactamases as well as mechanisms of fluoroquinolones resistance among P. aeruginosa isolated from various clinical sources from Nigeria. Materials and Method: Isolates were investigated using PCR, RFLP and sequencing for the detection of various β-lactamases and efflux pump regulator genes. Result: The prevalence of OXA-10, AmpC, CTX-M and SHV in P. aeruginosa was 80, 70, 5 and 5%, respectively. The coexistence of blaOXA-10 with blaAmpC, blaSHV and blaCTX-M was reported in 40, 5 and 5% of isolates, respectively. The efflux pump regulator genes mexR and nfxB were both amplified in 45% of the OXA-10-positive isolates. Conclusion: This is the first report of the characterization of OXA-10 extended-spectrum β-lactamases and occurrence of mexR and nfxB efflux regulator genes in clinical isolates of P. aeruginosa in Nigeria.

scholarly journals Extremely Drug-Resistant Pseudomonas aeruginosa ST309 Harboring Tandem GES Enzymes: A Newly Emerging Threat in the United States

2019 ◽  
Author(s):  
Ayesha Khan ◽  
Truc T. Tran ◽  
Rafael Rios ◽  
Blake Hanson ◽  
William C. Shropshire ◽  
...  
Keyword(s):  
United States ◽  
Pseudomonas Aeruginosa ◽  
Phylogenetic Analysis ◽  
The United States ◽  
Clinical Isolates ◽  
Drug Resistant ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases ◽  
Lactamase Inhibitor

AbstractTwo ST309 Pseudomonas aeruginosa clinical isolates resistant to carbapenems and newer β-lactam/β-lactamase inhibitor combinations were found to harbor the extended spectrum beta-lactamases GES 19 and 26 genetically clustered in tandem. The combination of ceftazidime/avibactam plus aztreonam achieved cure in one patient. Phylogenetic analysis suggests that ST309 P. aeruginosa carrying tandem GES are an emerging lineage in the United States.

scholarly journals Aminoglycoside-modifying enzymes in clinical isolates harboring extended-spectrum beta-lactamases.

1992 ◽  
Vol 36 (11) ◽  
pp. 2536-2538 ◽  
Author(s):  
A Fernandez-Rodriguez ◽  
R Canton ◽  
J C Perez-Diaz ◽  
J Martinez-Beltran ◽  
J J Picazo ◽  
...  
Keyword(s):  
Clinical Isolates ◽  
Beta Lactamases ◽  
Extended Spectrum ◽  
Extended Spectrum Beta Lactamases
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