The effect of ISAba1-mediated adeN gene disruption on Acinetobacter baumannii pathogenesis
نویسندگان
چکیده
منابع مشابه
Tn6168, a transposon carrying an ISAba1-activated ampC gene and conferring cephalosporin resistance in Acinetobacter baumannii.
OBJECTIVES To explore the cause of third-generation cephalosporin resistance in Australian Acinetobacter baumannii isolates belonging to global clone 1 (GC1). METHODS GC1 isolates from Australia were tested for resistance to ceftazidime and cefotaxime using disc diffusion and MICs. PCR was used to determine the context of ISAba1-ampC configurations and amplicons were sequenced. The level of t...
متن کاملImipenem-resistant Acinetobacter baumannii carrying the ISAba1-blaOXA-23,51 and ISAba1-blaADC-7 genes in Monteria, Colombia
The purpose of this study was to identify the genes coding for resistance to ceftazidime and imipenem and describe the molecular epidemiology of A. baumannii strains isolated from a clinical center in Colombia. Twenty isolates of imipenem-resistant A. baumannii from an equal number of patients with nosocomial infections were obtained. Primers were used to amplify genes bla IMP, bla VIM, bla OXA...
متن کاملISAba1 targets a specific position upstream of the intrinsic ampC gene of Acinetobacter baumannii leading to cephalosporin resistance.
Sir, Resistance to third-generation cephalosporins such as ceftazidime and cefotaxime in Acinetobacter baumannii is often due to increased expression of an intrinsic ampC gene. Expression increases when the ISAba1 insertion sequence (IS) is present in the appropriate orientation upstream of the ampC gene, providing an outward-facing promoter that appears to be stronger than the intrinsic promot...
متن کاملthe washback effect of discretepoint vs. integrative tests on the retention of content in knowledge tests
در این پایان نامه تاثیر دو نوع تست جزیی نگر و کلی نگر بر به یادسپاری محتوا ارزیابی شده که نتایج نشان دهندهکارایی تستهای کلی نگر بیشتر از سایر آزمونها است
15 صفحه اولFunctional analysis of insertion sequence ISAba1, responsible for genomic plasticity of Acinetobacter baumannii.
ISAba1 is an insertion sequence that is widely distributed in Acinetobacter baumannii. We demonstrated here that ISAba1 and the composite transposon Tn2006 are capable of transposition, generating 9-bp target site duplications. The expression of the ISAba1 transposase-encoding gene was downregulated by translational frameshifting.
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ژورنال
عنوان ژورنال: Virulence
سال: 2017
ISSN: 2150-5594,2150-5608
DOI: 10.1080/21505594.2017.1339859