Gram-positive

gram-positive English + bacteria Alternative forms en gram-positive Etymology From en Gram a surname + en positive, after Danish bacteriologist Hans Christian Gram, who invented the Gram staining method. Adjective - en bacteriology of a bacterium That stains dark blue or violet after Gram staining, due to large quantities of peptidoglycan in the cell wall. en 1997 T. G. Nagaraja; C. J. Newbold; C. J. Van Nevel; D. I. Demeyer 13: Manipulation of ruminal fermentation P. N. Hobson; C. S. Stewart The Rumen Microbial Ecosystem 2nd http://books.google.com.au/books?id=--OAI30q6NgC&pg=PA545&dq=%22Gram-positive%22&hl=en&sa=X&ei=88wMUofFE-yQigf6vIDwDg&redir_esc=y#v=onepage&q=%22Gram-positive%22&f=false 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). en 2007 Alan R. Hauser Antibiotic Basics for Clinicians: Choosing the Right Antibacterial Agent 201 http://books.google.com.au/books?id=LemlBXMo5oQC&pg=PT214&dq=%22Gram-positive%22&hl=en&sa=X&ei=88wMUofFE-yQigf6vIDwDg&redir_esc=y#v=onepage&q=%22Gram-positive%22&f=false Note that L.[Listeria] monocytogenes is one of the few Gram-positive bacteria against which vancomycin is not effective — hence the need for ampicillin. en 2011 Patricia L. Keen; Mark H. M. M. Montforts Antimicrobial Resistance in the Environment http://books.google.com.au/books?id=eCGWeEIx0owC&pg=PA108&dq=%22Gram-positive%22&hl=en&sa=X&ei=88wMUofFE-yQigf6vIDwDg&redir_esc=y#v=onepage&q=%22Gram-positive%22&f=false 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. Coordinate terms en Gram-negative See also en Gram staining en Gram's method en eponyms