Saccharomyces cerevisiae boulardii transient fungemia after intravenous self-inoculation

Lola Cohen1, Stéphane Ranque2, Didier Raoult3

  • 1Hôpital de la Conception, Service de psychiatrie Secteur 2, 147 Boulevard Baille, 13385 Marseille cedex 05, France.

Insights

Injecting Saccharomyces cerevisiae (boulardii) yeast, a young psychotic patient experienced a brief fever. This case suggests the yeast is safe for non-immunocompromised individuals, resolving symptoms without intervention.

Area of Science:

  • Microbiology
  • Clinical Case Study
  • Pharmacology

Background:

  • Intravenous drug use poses significant health risks, including infections from non-sterile injections.
  • Saccharomyces cerevisiae (boulardii) is a yeast commonly used as a probiotic.
  • Psychotic individuals may engage in high-risk behaviors, necessitating careful clinical evaluation.

Purpose of the Study:

  • To document the clinical outcome of intravenous self-administration of Saccharomyces cerevisiae (boulardii).
  • To assess the safety and host response to yeast inoculation in a non-immunocompromised individual.
  • To contribute to the understanding of potential risks associated with non-standard routes of yeast administration.

Main Methods:

  • A case report detailing the clinical presentation and progression of a young female intravenous drug user.
  • Observation of the patient's symptoms, specifically fever, following self-injection of Saccharomyces cerevisiae (boulardii).
  • Spontaneous resolution of symptoms was monitored to infer host response and yeast "inocuity" (harmlessness).

Main Results:

  • The patient developed a transient fever lasting 24 hours post-injection.
  • The fever resolved spontaneously without any therapeutic intervention.
  • No other adverse events or complications were reported during the observation period.

Conclusions:

  • The self-injection of Saccharomyces cerevisiae (boulardii) in this non-immunocompromised host resulted in a self-limiting febrile episode.
  • The findings suggest that Saccharomyces cerevisiae (boulardii) may be innocuous when introduced intravenously in a healthy host.
  • Further quasi-experimental studies are warranted to confirm the safety profile of intravenous yeast administration.