Hong Kong Journal of Nephrology

Volume 4 Number 2, 2002

Green urine

Terence Pok-Siu YIP, Sing-Leung LUI, Wai-Kei LO
University Department of Medicine, Tung Wah Hospital, Hong Kong.

A 72-year-old man who was on long-term Foley catheter usage because of a neurogenic bladder, was admitted to Tung Wah Hospital because of fever. He was found to have greenish discoloration of his urine (Panels A and B). A urine culture yielded Pseudomonas aeruginosa. The green-colored urine cleared after a course of quinolone.

Green color in the urine is caused by two soluble pigments produced by P. aeruginosa, namely pyocyanin and pyoverdin. Both pigments are lethal for many other bacteria, but there is no evidence that either has a major role in human infections. (Hong Kong J Nephrol 2002;4(2):114)

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