Enterobacteriaceae bacteria are clinically important and lead to various diseases associated with high mortality morbidity, including urinary tract infections, yet their treatment is a challenge due increasing antibiotic resistance. This study examined the cytotoxicity effects viability-inducing abilities of mecillinam fosfomycin antibiotics in extended-spectrum beta-lactamase Klebsiella pneumo...

A chromosomally encoded oxacillinase, OXA-69, was characterized from Acinetobacter baumannii AYE. beta-Lactamase OXA-69 shared 97% amino acid identity with the recently described OXA-51 enzyme of A. baumannii and 62 and 56% amino acid identity with the carbapenem-hydrolyzing oxacillinases OXA-24 and OXA-23, respectively. Biochemical characterization of the purified OXA-69 revealed a narrow-spec...

First submission on 23/05/13; last submission on 01/06/13; accepted for publication on 17/06/13; published on 20/12/13 1. MSc by the Clinical Analysis Department Faculty of Pharmaceutical Sciences Universidade de São Paulo (USP). 2. Post-doctorate in Sciences by Instituto de Química da USP; professor at the Microbiology Department Biomedical Sciences InstituteUSP and at the Clinical Analysis De...

7. Playford EG, Craig JC, Iredell JR. Carbapenem-resistant Acinetobacter baumannii in intensive care unit patients: risk factors for acquisition, infection and their consequences. J Hosp Infect 2007;65:204–211. 8. Kopterides P, Koletsi PK, Michalopoulos A, Falagas ME. Exposure to quinolones is associated with carbapenem resistance among colistin-susceptible Acinetobacter baumannii blood isolate...

We investigated the basis of the carbapenem resistance of 17 multidrug-resistant Acinetobacter baumannii clinical isolates collected from 2004 to 2005 at the Saint George University Hospital in Beirut, Lebanon. A. baumannii isolates were clonally related and were susceptible to colistin and trimethoprim-sulfamethoxazole, susceptible or intermediate to ampicillin-sulbactam and meropenem, and res...

The spread of the plasmid-mediated carbapenem-hydrolyzing oxacillinase OXA-58 was detected in Acinetobacter sp. clinical isolates from southern Europe, the Balkans, and central Turkey. It may contribute significantly to the emergence of carbapenem resistance in Acinetobacter spp., at least in this part of the world.

Carbapenem-resistant isolates of Acinetobacter baumannii from intensive care units at Split University Hospital, Split, Croatia, were studied. Most (100 of 106) had ISAba1 inserted upstream of a bla(OXA-107) gene, encoding an unusual OXA-51-type oxacillinase. Pulsed-field gel electrophoresis revealed that the isolates formed three clusters belonging to the sequence group 2 (European clone 1) li...

The genetic structures surrounding the plasmid-carried blaOXA-23 oxacillinase gene, encoding resistance to carbapenems, were studied in Acinetobacter baumannii. ISAba1 and the novel element ISAba4 were detected upstream of the blaOXA-23 gene, providing promoter sequences for its expression. These insertion elements were likely involved in transposition processes at the origin of acquisition of ...