OBJECTIVES We analysed the architecture and probable origin of a class 1 integron from cefotaxime-resistant Morganella morganii isolates. METHODS bla genes and class 1 integron elements were detected by PCR and DNA-DNA hybridization in a M. morganii strain isolated in 1996. PCR-mapping and sequencing of different fragments were carried out to determine the integron's architecture. RESULTS A...

The integron is a bacterial recombination system that allows acquisition, stockpiling and expression of cassettes carrying protein-coding sequences, and is responsible for the emergence and rise of multiresistance in Gram-negative bacteria. The functionality of this system depends on the insertion of promoterless cassettes in correct orientation, allowing their expression from the promoter loca...

Integrons have been widely described among the Enterobacteriaceae including strains of multi-resistant Salmonella enterica serotype Typhimurium DT104; however, information with respect to the presence of integrons among S. enterica serotype Enteritidis strains is limited. Multi-resistant isolates of Enteritidis were screened for the presence of integrons using a PCR protocol. One integron was d...

Integrons are genetic elements known for their role in the acquisition and expression of genes conferring antibiotic resistance. Such acquisition is mediated by an integron-encoded integrase, which captures genes that are part of gene cassettes. To test whether integrons occur in environments with no known history of antibiotic exposure, PCR primers were designed to conserved regions of the int...

In a hematology unit in the Netherlands, the incidence of ciprofloxacin-resistant Enterobacter cloacae and Escherichia coli increased from from 1996 to 1999. Clonal spread of single genotypes of both ciprofloxacin-resistant E. coli and Enterobacter cloacae from patient to patient was documented by pulsed-field gel electrophoresis and random amplification of polymorphic DNA. In addition, genetic...

E.coli, an important vector distributing antimicrobial resistance in the environment, was found to be multi-drug resistant, abundant, and genetically diverse in the Matang mangrove estuaries, Malaysia. One-third (34%) of the estuarine E. coli was multi-drug resistant. The highest antibiotic resistance prevalence was observed for aminoglycosides (83%) and beta-lactams (37%). Phylogenetic groups ...

objective(s): drug resistant acinetobacter baumannii have emerged as a major problem in many hospitals and intensive care units. various types of extended spectrum beta-lactamases (esbls) are responsible for resistance to beta- lactam antibiotics in different parts of the world. the objective of this study was to determine the prevalence of integron class1 (int 1) and esbl types per-1, per-2 an...

conclusions the study revealed a high prevalence of multi-drug resistance (mdr), class 1 integron, sccmec type iii, and spa type t030 amongst mrsa associated with burn wounds in an iranian hospital. the existence of sccmec type iii in burn patients emphasizes the nosocomial origin of these strains. objectives the aim of this study was to determine the distribution and molecular types of mrsa in...

Results The isolate was confirmed as E. coli O25b-sequence type (ST) 131 clone of B2 phylogenetic group. The isolate was resistant to all antibiotics tested except sulfamethoxazole, trimethoprim and nitrofurantoin and Etest confirmed that it is highly resistant to meropenem, imipenem, ciprofloxacin, cefotaxime and ceftazidime with MIC values of >16 mg/l, 32 mg/l, >64 mg/l, 32 mg/l & >32mg/l res...