gram-negative

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gram-neg·a·tive

or Gram-neg·a·tive (grăm′nĕg′ə-tĭv)
adj.
Of, relating to, or being a bacterium that does not retain the violet stain used in the Gram stain method.

Gram-negative

adj
(Microbiology) designating bacteria that fail to retain the violet stain in Gram's method

Gram′-neg′ative

(græm)

adj. (often l.c.)
(of bacteria) not retaining the violet dye when stained by Gram's method.
[1905–10]

gram-negative

Relating to a group of bacteria that generally are resistant to the effects of antibiotics or the actions of the body's immune cells. Gram-negative bacteria have relatively thin cell walls and, when subjected to a specialized laboratory staining method, do not change color. Compare gram-positive.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.Gram-negative - (of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method
bacteria, bacterium - (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
disconfirming, negative - not indicating the presence of microorganisms or disease or a specific condition; "the HIV test was negative"
Translations

gram-neg·a·tive

n. gram-negativo, resultado de la aplicacion del método de Gram de decoloración de una bacteria o tejido por medio de alcohol.

Gram-negative

adj Gram negativo
References in periodicals archive ?
The Present study was designed to estimate the comparative efficacy of disinfectants against Gram negative bacteria isolated from polutted inanimate surfaces of urology ward, Mayo Hospital, Lahore.
These results are in accordance with other studies where Gram negative bacteria caused sepsis in newborns were high in number 92.
The identification tests for gram positive bacteria were gram stain, coagulase test, catalase test and for gram negative bacteria were gram stain, IMViC (Indole, methyl red, voges-proskauer, citrate), motility, urease, TSI, oxidase were done from an isolated colony.
The defect could potentially result in misclassification of a resistant or partially resistant strain of gram negative bacteria, leading to treatment with an inappropriate antibiotic or a delay in the start of an appropriate therapy.
The researchers used clinically isolated strains of gram positive (Staphylococcus aureus and Micrococcus luteus) and gram negative bacteria (Escherichia coli and Pseudomonas aeruginosa) to examine the antimicrobial properties of the plant.
They collected microbiology data from all cultures that tested positive for gram negative bacteria in patients aged 65 years and older who were admitted to the University of Maryland Medical Center between January 1998 and December 2005.
In Gram negative bacteria, the main signaling molecules are acyl homoserine lactones.
In addition, the increasing prevalence of antimicrobial resistance in hospital-acquired Gram negative bacteria has become one of the major problems in the antimicrobial treatment [7].
Ionic silver is well accepted as an antiseptic and is a proven broad-spectrum antimicrobial agent that eradicates gram positive and gram negative bacteria including antibiotic-resistant bacteria like methicillin-resistant Staphylococus aureus (MRSA) and Vancomycin-resistant Enterococcus (VRE).