Occurrence and pathogenicity of Mycoplasma hominis in the upper urinary tract: a review

Insights

Mycoplasma hominis may cause acute pyelonephritis in humans, accounting for about 5% of cases. Diagnosis requires upper urinary tract culture and urine antibodies, not just serum response.

Area of Science:

  • Urology
  • Infectious Diseases
  • Microbiology

Background:

  • Pyelonephritis is a serious kidney infection.
  • The causative agents of pyelonephritis are typically bacteria.
  • The role of Mycoplasma hominis in pyelonephritis requires further investigation.

Purpose of the Study:

  • To investigate the potential role of Mycoplasma hominis as a causative agent of acute pyelonephritis in humans.
  • To establish diagnostic criteria for Mycoplasma hominis-induced pyelonephritis.

Main Methods:

  • Culture of Mycoplasma hominis from upper urinary tract specimens of patients with pyelonephritis.
  • Serological testing for antibodies to Mycoplasma hominis in serum and urine.
  • Analysis of clinical symptoms and patient history.

Main Results:

  • Mycoplasma hominis was isolated from the upper urinary tract of 17 patients with acute pyelonephritis.
  • In 12 of these patients, no other microorganisms were recovered.
  • Antibodies to Mycoplasma hominis were detected in the urine of nine patients, and significant changes in serum antibody titers were observed in 13 patients.

Conclusions:

  • Mycoplasma hominis is suggested as a potential cause of acute pyelonephritis, estimated in approximately 5% of cases.
  • Diagnosis is supported by upper urinary tract culture and the presence of urine antibodies.
  • Serum antibody response or culture from catheter-collected urine is insufficient for diagnosis.

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