[Pseudomonas infection associated with whirlpool bath].

After using a whirlpool-spa when the chlorine concentration in the water was very low (0.1 mg/l free chlorine) approximately 20 persons developed a follicular rash. No cases were registered in bathers when the chlorine concentration was acceptable (0.9-1.2 mg/l). The same sero-group and phagetype of Pseudomonas aeruginosa was cultivated from a patient and from the piping system of the spa. The importance of following directions for the installation of whirlpool-spas and regulations for their operation and control is strictly stressed. The National Agency for Environmental Protection is asked to reinforce the existing regulations concerning whirlpool-spas.