Six cases of sepsis caused by Pantoea agglomerans in a teaching hospital

Area of Science:

• Microbiology
• Infectious Diseases
• Hospital Epidemiology

Background:

• Pantoea agglomerans is a Gram-negative bacterium commonly found in the environment.
• While typically considered a non-pathogen, opportunistic infections have been rarely reported.
• The emergence of nosocomial infections necessitates understanding potential pathogens in hospital settings.

Observation:

• A cluster of six cases involving Pantoea agglomerans occurred within a three-month period at a teaching hospital.
• Infections were identified through blood cultures in patients from oncology (5 cases) and intensive care units (1 case).
• In one instance, P. agglomerans was co-isolated with Rahnella aquatilis and Candida famata.

Findings:

• Pantoea agglomerans was confirmed as the causative agent in five out of six cases.
• The organism demonstrated the capacity to cause serious nosocomial infections.
• Patients with underlying conditions and compromised immune systems were particularly vulnerable.

Implications:

• This outbreak underscores the potential for environmental bacteria like P. agglomerans to cause hospital-acquired infections.
• Enhanced surveillance and infection control measures may be necessary, especially for immunocompromised patient populations.
• Further research into the virulence factors and transmission routes of P. agglomerans in healthcare settings is warranted.