Acinetobacter ursingii

Background

Microbiology

• Non-motile, aerobic, oxidase negative, non-fermentative, Gram-negative coccobacillus
• Member of the genus Acinetobacter with low pathogenicity

Epidemiology

• Rare cause of disease in humans
• Mostly affects immunocompromised patients or critically ill patients
• Possible association with malignancy

Clinical Manifestations

• Primary bacteremia
• Urinary tract infection
• Hospital-associated pneumonia

Management

• Often susceptible, but should still treat broadly (e.g. meropenem) and narrow based on susceptibilities

Further Reading

• A retrospective study of the incidence, clinical characteristics, identification, and antimicrobial susceptibility of bacteremic isolates of Acinetobacter ursingii. BMC Infect Dis. 2015;15(400). doi: 10.1186/s12879-015-1145-z
• Bacterial Identification, Clinical Significance, and Antimicrobial Susceptibilities of Acinetobacter ursingii and Acinetobacter schindleri, Two Frequently Misidentified Opportunistic Pathogens. J Clin Microbiol. 2006;44(12):4471-4478. doi: 10.1128/JCM.01535-06