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• s  (of bacteria) being of or relating to a bacterium that does not retain the violet stain used in Gram's method

• Such infection with toxic, "gram-negative" bacteria kills up to 100,000 Americans a year, many of them surgical patients and trauma victims.
• The protective value of both "gram-positive" and "gram-negative" destroyers has yet to be tried on human beings.
• Streptomycin, an antibiotic containing a germ-killing soil organism called Actinomyces griseus, is especially effective against certain deadly "gram-negative" infections for .

• Gram-negative

News & Articles

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• The End of Antibiotics?
  Maryn McKenna has an unsettling and sobering article at Nature examining the the emergence of carbapenem-resistant Enterobacteriaceae. Since 2002, this large family of bacteria, gram-negative organisms that include many symbionts as well as the gut-dwelling Escherica coli and Klebsiella species that cause hospital infections, are increasingly in possession of a carbapenem-resistance gene rending ...
  Aug. 2, 2013 - Discover