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GRAM-NEGATIVE
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I. (adjective)
Sense 1
Meaning:
(of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method
Classified under:
Similar:
disconfirming; negative (not indicating the presence of microorganisms or disease or a specific condition)
Domain category:
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)
Context examples:
A species of aerobic, Gram-negative, rod shaped bacteria in the phylum Bacteroidetes.
(Myroides odoratus, NCI Thesaurus)
A broad-spectrum parenteral carbapenem with activity against aerobic, anaerobic, gram-positive and gram-negative organisms including non-fermenters.
(Panipenem, NCI Thesaurus)
A species of facultatively anaerobic, Gram-negative, rod shaped bacteria in the phylum Proteobacteria.
(Pantoea agglomerans, NCI Thesaurus)
A genus of obligately anaerobic, Gram-negative, rod shaped bacteria assigned to the phylum Bacteroidetes.
(Parabacteroides merdae, NCI Thesaurus)
The sulfate salt form of paromomycin, a structural derivative of neomycin, an aminoglycoside antibiotic with amebicidal and bactericidal effects against predominantly aerobic gram-negative bacteria.
(Paromomycin Sulfate, NCI Thesaurus)
Norfloxacin concentrates in the renal tubules and bladder and is bactericidal against a wide range of aerobic gram-positive and gram-negative organisms.
(Norfloxacin, NCI Thesaurus)
Activated by bacterial flavoproteins to intermediates that inactivate bacterial ribosomal proteins, Nitrofurantoin is used prophylactically as a urinary anti-infective agent against most gram-positive and gram-negative organisms and for long-term suppression of infections.
(Nitrofurantoin, NCI Thesaurus)
Nalidixic acid is active against most gram-negative organisms that cause urinary tract infections.
(Nalidixic Acid, NCI Thesaurus)
Nifurtoinol is bactericidal to most gram-positive and gram-negative urinary tract pathogens.
(Nifurtoinol, NCI Thesaurus)
Nitrocefin is sensitive to hydrolysis by all lactamases produced by gram-positive and gram-negative bacteria.
(Nitrocefin, NCI Thesaurus)
