# Septic Shock Due to Brevundimonas diminuta Bacteremia in an Immunocompetent Patient: A Case Report With a Literature Review of Antimicrobial Resistance Patterns

## TL;DR

A rare case of septic shock caused by Brevundimonas diminuta in an otherwise healthy patient is reported, highlighting the challenges of diagnosing and treating this uncommon infection.

## Contribution

This is the first reported case of B. diminuta septic shock in an immunocompetent individual.

## Key findings

- Brevundimonas diminuta caused septic shock in an immunocompetent patient.
- Only 12 cases of B. diminuta infections have been reported in North America.
- B. diminuta presents diagnostic and therapeutic challenges due to its rare occurrence and variable antibiotic susceptibility.

## Abstract

Brevundimonas species are a group of aerobic, non-fermenting, Gram-negative bacilli that are primarily environmental organisms commonly isolated from soil, water, and hospital surfaces. While historically regarded as non-pathogenic, they are increasingly recognized as opportunistic pathogens in immunocompromised or critically ill individuals. While most Brevundimonas species are not known to cause human disease, Brevundimonas diminuta and Brevundimonas vesicularis are the two species most commonly associated with human infections. Due to its uncommon occurrence and variable antibiotic susceptibility, B. diminuta is a diagnostic and therapeutic challenge. To our knowledge, only 12 cases of B. diminuta infections have been reported in North America to date. Here, we present a rare case of septic shock due to B. diminuta bacteremia in an immunocompetent patient.