Corynebacterium mucifaciens in an immunocompetent patient with cavitary pneumonia.

Background: Corynebacterium mucifaciens has been mainly isolated from skin, blood and from other normally-sterile body fluids. It has rarely been described as a human pathogen since its description.

Case Presentation: We herein report the first case of cavitary pneumonia due to C.

Molecular and biochemical characterization of SHV-56, a novel inhibitor-resistant beta-lactamase from Klebsiella pneumoniae.

A clinical strain of Klebsiella pneumoniae was found to possess the chromosomal gene bla(SHV-56), encoding a new inhibitor-resistant beta-lactamase with a pI of 7.6. SHV-56 is derived from SHV-11 by the single substitution K234R.

High genetic stability of integrons in clinical isolates of Shigella spp. of worldwide origin.

Over a 12-year period, 68 Shigella strains (31 S. sonnei, 30 S. flexneri, 4 S.

Cross-infection due to imipenem-resistant Bacteroides fragilis associated with a totally implantable venous port.

Four patients in an oncology ward developed Bacteroides fragilis bacteremia over a 12-day period. Cross-infection between two of them, due to an imipenem-resistant strain, was demonstrated by epidemiological investigation and genotypic typing methods (arbitrarily primed PCR fingerprinting and nucleotide sequencing of the cfiA genes and upstream IS1186/IS1168 elements).