A Rare Case of Leuconostoc pseudomesenteroides Bacteremia and Refractory Septic Shock

Abstract

Leuconostoc species are rare causes of bacteremia and are commonly mistaken for Streptococcus species. Due to their inherent resistance to commonly used drugs, they are often overlooked resulting in poor and sometimes lethal outcomes. While there are not many reported cases of this bacterial infection, Leuconostoc species are important to consider when faced with a highly drug-resistant bacterial strain. We present here a case of a 29-year-old male who presented with an out-of-hospital cardiac arrest, initially resuscitated but ultimately succumbing to his illness. This is a unique case in which our patient was subsequently found to have a rare bloodstream infection with Leuconostoc pseudomesenteroides.

Update of the list of qualified presumption of safety (QPS) recommended microbiological agents intentionally added to food or feed as notified to EFSA 19: Suitability of taxonomic units notified to EFSA until September 2023

“…Two are not related to this TU and another is not dealing with safety concerns, meaning that only three were found to be relevant for the QPS exercise. These articles (Botan et al, 2023, Ghobrial et al, 2023Immel & Widmer, 2023) presented methodological problems with reference to the identification of the causative agent. Consequently, the status of QPS-listed Leuconostoc species is not changed.…”