purple urine bag syndrome
INFECTIOUS DISEASE, NURSING
A rare finding in which the urine in a bag from a catheterised patient turns an intense purple hours to days after catheterisation.
Purple urine has been described in elderly women, and is linked to infection of the urine by bacteria with indoxyl phosphatase, which converts urinary indoxyl sulphate into purple coloured indirubin and indigo.
Causative bacteria Providencia stuartii, Escherichia coli, Klebsiella pneumoniae, Morganella morganii, Proteus mirabilis, Providencia rettgeri, Pseudomonas aeruginosa
References J Clin Microbiol 1988; 26:2152