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[Immunostimulants in chronic infection].

W J Pichler1

  • 1Institut für klinische Immunologie, Inselspital Bern.

Schweizerische Medizinische Wochenschrift
|June 16, 1990
PubMed
Summary

Bacterial extracts for recurrent infections lack proven efficacy due to flawed data and incorrect indications. Despite limitations, their use may be justified by rare side effects and potential antibiotic reduction.

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Area of Science:

  • Immunology
  • Microbiology
  • Pharmacology

Background:

  • Bacterial extracts are marketed as immunostimulatory drugs for recurrent infections.
  • Their efficacy is often based on in vitro data, with limited clinical evidence.

Purpose of the Study:

  • To critically review the immunological efficacy of bacterial extracts for recurrent infections.
  • To evaluate the scientific basis and clinical evidence supporting their use.

Main Methods:

  • Literature review of in vitro and clinical studies on bacterial extracts.
  • Analysis of immunological data and clinical trial outcomes.
  • Assessment of the indication for immunostimulant therapy in recurrent infections.

Main Results:

  • Postulated immunostimulatory efficacy relies on irrelevant in vitro data.
  • Existing data are inconsistent and contradictory; oral administration efficacy is doubtful.
  • Most recurrent infections stem from damaged barrier function, not immune deficiency.

Conclusions:

  • The immunological basis for bacterial extracts is weak, and clinical evidence is unconvincing.
  • The primary indication is often incorrect, as barrier dysfunction, not immune deficiency, causes most recurrent infections.
  • Despite limitations, bacterial extracts may be considered due to rare side effects, patient appeal, and potential antibiotic reduction.

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