Frontiers in Immunology (Aug 2021)

Case Report: Acquired Disseminated BCG in the Context of a Delayed Immune Reconstitution After Hematological Malignancy

  • Vincent Gies,
  • Vincent Gies,
  • Vincent Gies,
  • Yannick Dieudonné,
  • Yannick Dieudonné,
  • Florence Morel,
  • Florence Morel,
  • Wladimir Sougakoff,
  • Wladimir Sougakoff,
  • Raphaël Carapito,
  • Raphaël Carapito,
  • Aurélie Martin,
  • Noëlle Weingertner,
  • Léa Jacquel,
  • Léa Jacquel,
  • Fabrice Hubele,
  • Cornelia Kuhnert,
  • Sophie Jung,
  • Sophie Jung,
  • Frederic Schramm,
  • Pierre Boyer,
  • Yves Hansmann,
  • François Danion,
  • Anne-Sophie Korganow,
  • Anne-Sophie Korganow,
  • Aurélien Guffroy,
  • Aurélien Guffroy

DOI
https://doi.org/10.3389/fimmu.2021.696268
Journal volume & issue
Vol. 12

Abstract

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ContextDisseminated infections due to Mycobacterium bovis Bacillus Calmette-Guérin (BCG) are unusual and occur mostly in patients with inborn error of immunity (IEI) or acquired immunodeficiency. However, cases of secondary BCGosis due to intravesical BCG instillation have been described. Herein, we present a case of severe BCGosis occurring in an unusual situation.Case DescriptionWe report one case of severe disseminated BCG disease occurring after hematological malignancy in a 48-year-old man without BCG instillation and previously vaccinated in infancy with no complication. Laboratory investigations demonstrated that he was not affected by any known or candidate gene of IEI or intrinsic cellular defect involving IFNγ pathway. Whole genome sequencing of the BCG strain showed that it was most closely related to the M. bovis BCG Tice strain, suggesting an unexpected relationship between the secondary immunodeficiency of the patient and the acquired BCG infection.ConclusionThis case highlights the fact that, in addition to the IEI, physicians, as well as microbiologists and pharmacists should be aware of possible acquired disseminated BCG disease in secondary immunocompromised patients treated in centers that administrate BCG for bladder cancers.

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