Staphylococcus saprophyticus urinary tract infections: epidemiological data from Western Australia

Area of Science:

• Microbiology
• Epidemiology
• Urology

Background:

• Urinary tract infections (UTIs) are common, with Staphylococcus saprophyticus being a significant causative agent, particularly in young women.
• Understanding the epidemiology and risk factors for S. saprophyticus UTIs is crucial for effective prevention and treatment strategies.

Purpose of the Study:

• To investigate the epidemiological characteristics of Staphylococcus saprophyticus urinary tract infections (UTIs) in Western Australia over a 12-month period.
• To identify potential reservoirs and risk factors associated with S. saprophyticus UTIs, particularly in relation to age and hormonal status.

Main Methods:

• Retrospective analysis of epidemiological data on S. saprophyticus UTIs collected over 12 months.
• Analysis of patient demographics, including age, sex, and pregnancy status.
• Microbiological investigation of S. saprophyticus isolation from genital tracts.

Main Results:

• S. saprophyticus was the second most frequent cause of UTIs (15.2%) in females aged 13-40 years, after Escherichia coli (70.8%).
• No significant seasonality was observed for S. saprophyticus UTIs.
• S. saprophyticus was isolated from the genital tract of 4.6% of females aged 13-40 years, but not from older females or males aged 13-40 years, suggesting a potential reservoir.

Conclusions:

• S. saprophyticus UTIs predominantly affect females aged 13-40 years.
• The findings suggest a possible relationship between female hormonal status and S. saprophyticus UTIs, meriting further investigation.
• The genital tract may serve as a reservoir for S. saprophyticus infections in premenopausal women.