gram-negative

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Related to Gram-negative bacterium: Gram positive bacterium

gram-negative

[′gram¦neg·əd·iv]

(microbiology)

Of bacteria, decolorizing and staining with the counterstain when treated with Gram's stain.

References in periodicals archive ?

Meningococcal disease is an infection of the blood caused by the gram-negative bacterium Neisseria meningitidis, and is one of the few diseases that can kill an otherwise healthy child within hours.

XOMA's NEUPREX(R) Granted Orphan Status in Europe; XOMA Proceeding With Marketing Assessment

Liu and his coworkers inserted two Bs genes into the gram-negative bacterium Asticcacaulis excentricus, causing it to produce one of the three Bs poisons.

Mauling mosquitoes naturally

Meningococcemia is an infection of the blood caused by the gram-negative bacterium Neisseria meningitides, and is one of the few diseases that can kill an otherwise healthy child within hours.

XOMA Unveils Strategy, Provides Update on NEUPREX(R); European Effort Advances Toward Orphan Drug Designation and Approval Under Exceptional Circumstances; US Trials Progress