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Case report
Lactococcus lactis bacteraemia in a patient on probiotic supplementation therapy
  1. Amelia Gurley1,
  2. Thomas O'Brien2,
  3. Joseph M Garland2 and
  4. Arkadiy Finn3
  1. 1Department of Medicine, Brown University Warren Alpert Medical School, Providence, Rhode Island, USA
  2. 2Division of Infectious Diseases, Brown University Warren Alpert Medical School, Providence, Rhode Island, USA
  3. 3Division of Hospital Medicine, Brown University Warren Alpert Medical School, Providence, Rhode Island, USA
  1. Correspondence to Dr Arkadiy Finn; afinn1{at}lifespan.org

Abstract

A 59-year-old woman presented with fever and malaise and was found to have Lactococcus lactis bacteraemia. L. lactis infection is rare in humans with few reported cases, with most associated with dairy food product ingestion. The patient reported use of a multistrain over-the-counter probiotic supplement. After isolation of L. lactis from blood culture, the patient was treated empirically with ertapenem and amoxicillin and displayed clinical improvement. She remained well after completion of antibiotic regimen and discontinued probiotic supplementation use. We review the clinical presentation of L. lactis infection including diagnosis, identification and treatment.

  • infections
  • infectious diseases
  • vitamins and supplements

https://doi.org/10.1136/bcr-2021-243915

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    Footnotes

    • Contributors AF and AG were responsible for primary manuscript writing and data gathering. TO and JMG were responsible for manuscript editing and data gathering.

    • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

    • Competing interests None declared.

    • Provenance and peer review Not commissioned; externally peer reviewed.