Gram negative

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Gram negative

Used of a micro-organism that when stained by Gram's method does not retain the purplish dye, methyl violet, but only the red counter-stain carbol fuchsin. Stained Gram negative organisms appear red. The whole class of medically important bacteria can be divided into a large GRAM POSITIVE group and a smaller Gram negative group. This division is an important step in identification. (Hans Christian Joachim Gram, 1853–1938, Danish physician).

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

References in periodicals archive ?

[beta]-lactamase enzymes are the most frequent and play a key role, conferring resistance of bacteria to the [beta]-Lactam antibiotic group, such as penicillins and cephalosporins.14,15 Antibiotic resistances among Gram negative bacteria is on increase due to the spread of strains producing extended-spectrum [beta]-lactamase enzymes (ESBLs).

Phenotypic detection of Extended Spectrum [beta]-Lactamases (ESBL) among gram negative uropathogens reveals highly susceptibility to imipenem

Over the previous couple of years, Metallo-beta-lactamase producing Gram Negative Rods are being notifiable with the increasing frequency from various parts of the world and they seems as a most generally circulated and have carbapenem resistance mechanism.

Isolation and Antimicrobial Susceptibility Paradigm of Carbapenem Resistant Metallo-Beta-Lactamase Producing Gram Negative Rods

None of the Gram negative bacteria showed presence of the KPC gene but 7 Gram negative bacteria showed carbapenem resistance in antimicrobial susceptibility testing.

Multiplex polymerase chain reaction (PCR) for rapid bacterial identification from blood cultures: ready for prime time in India?

Antimicrobial susceptibility of Gram negative organisms isolated from patients hospitalized in intensive care units in United States and European hospitals (2009-2011).

Multidrug resistance in Gram-negative pathogens isolated from patients with chronic kidney diseases and renal transplant

ESBL test-ESBL production in gram negative isolates were confirmed by double disk potentiation test (phenotypic confirmatory test).

A Study of Neonatal Septicaemia in a Tertiary Care Hospital

Keywords: Non fermenter Gram negative bacilli (NFGNB), Imipenem resistant, Metallo beta lactamase, Antimicrobial susceptibility.

FREQUENCY AND SUSCEPTIBILTY PATTERN OF NON FERMENTER GRAM NEGATIVE BACILLI IN A TERTIARY CARE HOSPITAL

Staphylococcus aureus was found to be the commonest organism (15, 27.27%), closely followed by Gram negative bacilli (14, 25.45%) (Table 2).

Non-tubercular empyema thoracis- a comparative analysis of gram positive and gram negative organism associated empyema

Isolation and identification: Gram negative bacteria were isolated and identified following Bergey's Manual of Determinative Bacteriology (1994).

DIVERSITY OF BACTERIAL CONTAMINATION ON IN-ANIMATE SURFACES OF A TERTIARY CARE HOSPITAL AND THEIR SENSITIVITY TO DISINFECTANTS

Many studies done in CSOM have found the predominance of gram negatives in the ear discharge, with Pseudomonas and Proteus species as the most commonly identified aerobic organisms, while Bacteroides and Peptococcus/Peptostreptococcus sp.

Drift in the bacteriology of chronic suppurative otitis media and methicillin-resistant Staphylococcus aureus as an emerging pathogen: an experience

Upon gram staining, 4 isolates were identified as gram positive bacteria, while the 12 isolates shown as gram negative bacteria.

Characterization of potential phosphate solubilizing bacteria from the local paddy fields in Perlis

Overall, 26 different organisms (12 gram positive, 12 gram negative, and two acid fast bacilli) were identified in patients with BSIs.

Bloodstream infections among patients treated with intravenous epoprostenol or intravenous treprostinil for pulmonary arterial hypertension--seven sites, United States, 2003-2006

The genus Clostridium is a phylogenetically heterogeneous group of anaerobic, endospore-forming, rod-shaped bacteria; they are usually gram positive, but some species may stain gram variable or gram negative (1,2).