Microorganism in Overactive Bladder Patients

Samsung Medical Center

Status and phase

Completed

Phase 4

Conditions

Overactive Bladder

Treatments

Drug: azithromycin, doxycycline

Study type

Interventional

Funder types

Other

Identifiers

NCT00883818

2006-12-027

Details and patient eligibility

About

The objective of this prospective study is to determine the incidence of mycoplasma in women with overactive bladder (OAB) symptoms and whether antibiotic therapy targeting these organisms is effective.

Full description

Overactive bladder (OAB) syndrome is described as 'urgency, with or without urge incontinence, usually with frequency and nocturia' by the 2002 ICS Terminology Committee. A variety of medical conditions share the symptoms of OAB, and it is important to exclude these in the process of diagnosis. Urinary tract infection (UTI) is the most frequent alternative diagnosis. Even in patients considered to have interstitial cystitis, OAB is a high probability of diagnosis due to its insidious onset of irritative symptoms.For these reasons, ICS Terminology Committee stated that the term OAB can be used only if there is no proven infection or other obvious pathology.

Isolating causative organisms through urine culture plays a crucial role, but is likely to reveal a positive result in less than half of patients presenting with irritative symptoms. Even though ordinary bacteria are not cultured from these patients, there is some evidence to suggest that atypical organisms, such as genital mycoplasma, may be associated with OAB symptoms. For example, 48% of patients with chronic voiding symptoms showed positive cultures for Ureaplasma urealyticum and Mycoplasma hominis. In 91% of the patients with positive culture, symptom severity and frequency were improved after treatment. Another evidence for mycoplasmal involvement in OAB symptoms derives from the improvements in symptoms in more than two-thirds of patients complaining of persistent frequency and urgency after the use of doxycyline which is effective against U. urealyticum, M. hominis and Chlamydia trachomatis.

Mycoplasmas are the simplest micro-organisms regarded as true bacteria. They are highly pleomorphic parasites of humans and the absence of a cell wall has been used to distinguish mycoplasma and to place them taxonomically in the class Mollicutes.Mycoplasmas are not generally viewed as being highly virulent, although they usually manifest a predilection for particular host tissues, such as the urogenital or respiratory tracts. It is now being recognized that these organisms play a more important role in human infections than was previously thought. Its slow-growing, non-culturable nature enables them to establish chronic infections, resist the effects of antibiotics and protect the organisms against immune system reactivity.Accordingly, for patients presenting with irritative bladder symptoms, and especially whose first culture is negative, a further culture may be indicated to test specifically for Mycoplasma or Chlamydia infection.

Enrollment

84 patients

Sex

Female

Ages

20 to 80 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Women age of 20 ≤ and ≤ 80 years
Symptoms of urinary frequency (≥8 micturitions per 24 hours) and urinary urgency (defined as a level of 3 to 5 in a 5 point urgency scale) at least one episode a day as verified by baseline micturition diary
Symptoms of overactive bladder, including, urgency, frequency, and/or urinary urge incontinence for more than 3 months
No proven ordinary bacteria on routine urine culture or gram stain
Positive for one of Mycoplasma homonis, Ureaplasma Urealyticum and Chlamydia trachomatis on urethral or cervical swab

Exclusion criteria