title: Inhibition of the indole test reaction by sodium nitrite.
abstract: Sodium nitrite formed by nitrate reduction produced a false-negative reaction in the detection of indole formation when both tests were conducted in one medium.
mesh_terms: D001431:Bacteriological Techniques; D003470:Culture Media; D004926:Escherichia coli / Q000145:classification / Q000378:metabolism; D005188:False Negative Reactions; D007211:Indoles / Q000096:biosynthesis / Q000302:isolation & purification*; D009566:Nitrates / Q000378:metabolism; D009573:Nitrites / Q000096:biosynthesis; D010084:Oxidation-Reduction; D012964:Sodium; D012997:Solvents; D014364:Tryptophan / Q000378:metabolism; D014992:Xylenes
chemical_list: D003470:Culture Media; D007211:Indoles; D009566:Nitrates; D009573:Nitrites; D012997:Solvents; D014992:Xylenes; D014364:Tryptophan; D012964:Sodium