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Leuconostoc mesenteroides bacteremia in a patient with exposure to unpasteurised raw milk
  1. Shanan Immel1 and
  2. Kyle Widmer2
  1. 1Internal Medicine, Tulane University School of Medicine, New Orleans, Louisiana, USA
  2. 2Infectious Diseases, Southeast Louisiana Veterans Health Care System, New Orleans, Louisiana, USA
  1. Correspondence to Dr Shanan Immel; simmel{at}


Leuconostoc spp are lactic acid-producing bacteria closely related to the Streptococcus family. While usually associated with the fermentation of dairy products and sauerkraut, they are rarely associated with human infections. This is a case report of an immunocompetent patient found to have L. mesenteroides bacteremia associated with raw milk and poor dentition as the likely source of infection, which was treated successfully with daptomycin as this genus is intrinsically resistant to vancomycin.

  • Infections
  • Infection (gastroenterology)
  • Foodborne infections

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  • Contributors The case report and literature were primarily done by SI. Editing was performed by KW.

  • 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.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

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