Rapidly fatal infection with Bacillus cereus/thuringiensis: genome assembly of the responsible pathogen and consideration of possibly contributing toxins

Diagn Microbiol Infect Dis. 2021 Dec;101(4):115534. doi: 10.1016/j.diagmicrobio.2021.115534. Epub 2021 Sep 10.

Abstract

Bloodstream infection with Bacillus cereus/thuringiensis can be life threatening, particularly in patients who are severely immunocompromised. In this report we describe a case that progressed from asymptomatic to fatal over approximately 5 hours despite extensive resuscitation efforts. We identify the pathogen and assemble its genome, in which we find genes for toxins that may have contributed to the precipitous demise. In the context of this and other cases we discuss the possible indication for rapid appropriate antibiotic administration and potentially antitoxin treatment or toxin removal in fulminant illness in immunocompromised patients.

Keywords: Bacillus cereus/thuringiensis; hematologic malignancy; immunocompromise; induction chemotherapy; sepsis.

Publication types

  • Case Reports

MeSH terms

  • Bacillus cereus / genetics
  • Bacillus cereus / isolation & purification
  • Bacillus cereus / pathogenicity*
  • Bacillus thuringiensis / genetics
  • Bacillus thuringiensis / isolation & purification
  • Bacillus thuringiensis / pathogenicity*
  • Bacterial Toxins / genetics
  • Child, Preschool
  • Fatal Outcome
  • Female
  • Genome, Bacterial / genetics
  • Gram-Positive Bacterial Infections / immunology
  • Gram-Positive Bacterial Infections / microbiology
  • Gram-Positive Bacterial Infections / pathology
  • Humans
  • Immunocompromised Host
  • Sepsis / immunology
  • Sepsis / microbiology
  • Sepsis / pathology

Substances

  • Bacterial Toxins