gram-negative

(redirected from Gram negative bacteria)
Also found in: Thesaurus, Medical, Encyclopedia.

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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Gram-negative

adj
(Microbiology) designating bacteria that fail to retain the violet stain in Gram's method
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Gram′-neg′ative

(græm)

adj. (often l.c.)
(of bacteria) not retaining the violet dye when stained by Gram's method.
[1905–10]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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.
English-Spanish Medical Dictionary © Farlex 2012

Gram-negative

adj Gram negativo
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
Gram negative bacteria are a group of medically important bacteria that can cause severe infections in patients.
Of the total 32 isolates identified by FA-BCID, 50% (16/32) showed pure growth of Gram negative bacteria, 37.5% (12/32) showed pure growth of Gram positive bacteria, 6.25% (2/32) of Gram negative and Gram positive, and 6.25% (2/32) of Gram negative and Candida from the same culture bottle (Table 3).
Spider silk was found to be more effective against Gram negative bacteria (Acinetobactor sp.) than Gram positive bacteria (Streptococcus sp.).
(3,4) Several studies done earlier show that Klebsiella pneumoniae (32.5%) was the most frequent Gram negative bacteria isolated, followed by Gram positive Staphylococcus aureus (13.6%).
Results: Total number of 54 (8.49%) Gram positive and 582 (91.5%) Gram negative bacteria were identified.
Gram negative bacteria frequently contaminate air, equipment and surfaces in hospitals (Otter et al., 2011).
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 program will focus on developing improved therapeutics based on polymyxin, a class of antibiotics with a unique target that are currently viewed as a last resort when treating severe infections due to multidrug resistant Gram negative bacteria.
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.
[12] Resistance to [beta]-lactam antimicrobial agents especially to cephalosporins due to production of extended spectrum [beta]-lactamases (ESBL) by gram negative bacteria is on rise worldwide.
Both Gram positive and Gram negative bacteria were tested by agar diffusion method.