Introduction

Green nail syndrome is a condition caused by the Pseudomonas aeruginosa infection. It is most often reported in patients with predisposing conditions that favour the growth of this pathogen such as constant exposure of the hands to water, soaps and detergents, especially in elderly persons. Objective. The aim of this study is to present a case of the green nail syndrome in an elderly patient and bring attention to the greenish colour of the nails as a warning sign of the Pseudomonas aeruginosa infection.

Case report

An 88-year-old woman with asymptomatic green-yellowish changes on fingernail plates accompanied by onycholysis. The examination for fungal infection was negative, whereas the bacteriological culture of the nail was positive for Pseudomonas aeruginosa.

Conclusions

Green coloration of the nails should be a warning sign of the Pseudomonas aeruginosa infection. Treatment with oral ciprofloxacin, especially in elderly patients could be a valuable option for treating the green nail syndrome.