Hot tub rash

After the pinkeye outbreak of 2007 the lab now has a hot tub rash outbreak. The Pseudomonas folliculitis happens when the pseudomona bacteria infects hair follicles, and it usually resolves itself within 2 weeks. For some reason it seems to have only affected some individuals and not others. All of them were female. Any idea why?

At least no-one had a prostate infection, unlike this poor sap:
"A previously healthy 38-year-old white male presented to the emergency room with a 10-hour history of fevers, chills, and significant suprapubic pain. He also complained of dysuria and feelings of incomplete emptying after voiding. He denied any history of sexually transmitted diseases, recent urinary tract infections, or genitourinary trauma. He did mention having sexual relations with his wife three times the previous week in a newly purchased hot tub. His wife was asymptomatic."

"P. aeruginosa can survive in a variety of moist environments due to its minimal nutritional requirements and growth temperature range (4 to 42°C) (1). Although inhibited by chlorine levels in water of 2 to 3 ppm, P. aeruginosa can multiply to densities of 10⁴ to 10⁶ organisms/ml when levels drop to <1>4). These characteristics allow it to multiply in hot tubs, where chlorine levels are rapidly dissipated by the warm temperatures (39 to 40°C) and aeration (4). Hot tub use has been linked to P. aeruginosa folliculitis and more-serious infections, including pneumonia and those involving the urinary tract (cystitis, prostatitis, and urosepsis) (2, 3, 5-7)."