Gram-positive
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See also: gram-positive
English
Alternative forms
Etymology
From Gram (“a surname”) + positive, after Danish bacteriologist Hans Christian Gram, who invented the Gram staining method.
Adjective
Gram-positive (not comparable)
- (bacteriology, of a bacterium) That stains dark blue or violet after Gram staining, due to large quantities of peptidoglycan in the cell wall.
- 1997, T. G. Nagaraja, C. J. Newbold, C. J. Van Nevel, D. I. Demeyer, “13: Manipulation of ruminal fermentation”, in P. N. Hobson, C. S. Stewart, editors, The Rumen Microbial Ecosystem, 2nd edition, page 545:
- Generally, ionophore antibiotics are highly effective against Gram-positive bacteria but exhibit little or no activity against Gram-negative bacteria (Chen and Wolin, 1979; Watanabe et al., 1981).
- 2011, Patricia L. Keen, Mark H. M. M. Montforts, Antimicrobial Resistance in the Environment, page 108:
- The majority of Gram-positive (82%) and Gram-negative (64%) genera carry either ribosomal protection genes alone or in combination with efflux/enzymatic genes as illustrated in Table 7.2.