Risk factors for extended-spectrum beta-lactamase-producing Enterobacteriaceae in a neonatal intensive care unit.

Risk factors for colonization or infection with extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriaceae during an outbreak in a neonatal intensive care unit (NICU) included low gestational age and exposure to third-generation cephalosporins. We also reviewed the existing medical literature regarding the clinical epidemiology of ESBLs in NICUs .

Sequence-based identification of aerobic actinomycetes.

We investigated the utility of 500-bp 16S rRNA gene sequencing for identifying clinically significant species of aerobic actinomycetes. A total of 28 reference strains and 71 clinical isolates that included members of the genera Streptomyces, Gordonia, and Tsukamurella and 10 taxa of Nocardia were studied. Methods of nonsequencing analyses included growth and biochemical analysis, PCR-restriction enzyme analysis of the 439-bp Telenti fragment of the 65 hsp gene, susceptibility testing, and, for selected isolates, high-performance liquid chromatography.

Disseminated Mycoplasma orale infection in a patient with common variable immunodeficiency syndrome.

Human infection with Mycoplasma species other than M. pneumoniae are infrequent, but may be encountered in patients with immunodeficiencies. We report a patient with combined variable immunodeficiency that developed multiple abscesses and destructive bone disease caused by M.

Extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella species: risk factors for colonization and impact of antimicrobial formulary interventions on colonization prevalence.

Objective: The incidence of extended-spectrum beta-lactamase (ESbetaL)-mediated resistance has increased markedly during the past decade. Risk factors for colonization with ESbetaL-producing Escherichia coli and Klebsiella species (ESbetaL-EK) remain unclear, as do methods to control their further emergence.

Design: Case-control study.