Until the last decade, coagulase-negative staphylococci occurring in urine specimens were usually regarded as a contaminant. In the early 1970s, i.e., more than ten years after the original demonstration of Staphylococcus saprophyticus in urine specimens, this species became recognized as a frequent cause of urinary tract infections (UTI). In young women, S. saprophyticus is, after Escherichia coli, the second-most-frequent causative agent of acute UTI. Patients with UTI caused by S. saprophyticus usually present with symptomatic cystitis. Signs and symptoms of renal involvement are also often registered. The urine sediment of a patient with UTI caused by S. saprophyticus has a characteristic appearance microscopically. Chemical screening methods for bacteriuria do not always succeed in diagnosing UTI caused by S. saprophyticus. Even when such an infection occurs above the neck of the bladder, low numbers of colony-forming units (less than 10(5) cfu/ml) of S. saprophyticus are comparatively often found in the bladder and voided urine. S. saprophyticus is usually susceptible to antibiotics commonly prescribed for patients with UTI, with the exception of nalidixic acid. The bacterium has a capacity for selective adherence to human urothelium. It causes direct hemagglutination. The adhesin for S. saprophyticus is a lactosamine structure. This staphylococcal species produces an extracellular enzyme complex that can inhibit growth of both gram-positive and gram-negative bacteria.

Staphylococcus saprophyticus as a Common Cause of Urinary Tract Infections

A review of clinical and pathological prostatitis syndromes

Prostatitis Syndromes: New Perspectives About Old Woes

The role of Chlamydia trachomatis in chronic abacterial prostatitis: a study using ultrasound guided biopsy.

http://www.prostatitis-forum.com/docs/ascpps.pdf

Prostatitis: US perspective.

The possible role of Chlamydia trachomatis in non-acute prostatitis was investigated by cultural and serological techniques in a study of 53 adult males. C. trachomatis was isolated from the urethra of only one of the 53 patients and from none of the 28 specimens of prostatic fluid from the same patients. By means of a modified microimmunofluorescent test, serum chlamydial IgG antibodies at a titre of 1/64 or greater, or IgM antibodies at a titre of 1/8 or greater, or both were detected in six of the patients, suggesting a recent or current chlamydial infection, while IgG or IgA antibodies at a titre of 1/8 or greater were detected in the specimens of prostatic fluid from two of the 28 men studied. In the seven patients with evidence of chlamydial infection, as well as in a further 13 of the 53 patients studied, the presenting symptoms suggested non-gonococcal urethritis (NGU) rather than prostatitis. Thus in this study C. trachomatis would appear to play a minor aetiological role, if any, in non-acute prostatitis.

https://sti.bmj.com/content/sextrans/54/5/330.full.pdf

Role of Chlamydia trachomatis in non-acute prostatitis.

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Role of Chlamydia trachomatis in non-acute prostatitis.