In a meta-analysis examining respiratory specimen Gram stain for diagnosis of ventilator-associated pneumonia, absence of bacteria on Gram stain had a high negative predictive value, but a positive ...

Gram staining was developed in the 1800s as a quick and simple procedure to distinguish between Gram positive and Gram negative bacteria. It is one of the first laboratory techniques taught to ...

Sputum Gram stain and culture were once the gold standard of diagnosis in patients with pneumonia but have been discounted in recent years, with published sensitivity estimates ranging as low as 20% ...

Gram staining is a type of differential staining used to distinguish between Gram positive and Gram negative bacterial groups, based on inherent differences in their cell wall constituents. Stains ...

Similar outcomes in patients with ventilator-associated pneumonia (VAP) suggest that antibiotics selected by Gram staining were noninferior to those based on guidelines and also significantly ...

Bacterial species, and even specific strains can be differentiated using a number of molecular techniques such as PCR, quantitative PCR, genome sequencing and mass spectrometry. But even without ...

THE direct observation of the site of Gram stain in cells of micro-organisms could not be attempted before the ultra-thin section technique became available. However, to obtain a suitable section, ...

The aim of the present prospective study was to assess the validity of the Gram stain–AOLC test for the diagnosis of CRBI in HSCT recipients with nontunnelled CVCs, using the DTP/clinical criteria as ...

Hans Christian Joachim Gram was born on September 13, 1853, in Copenhagen, Denmark. He studied at the University of Copenhagen, where his study of plants introduced him to the fundamentals of ...