Ralstonia mannitolilytica bacteremia in a neonatal intensive care unit

Area of Science:

• Medical Microbiology
• Infectious Diseases
• Clinical Bacteriology

Background:

• Ralstonia mannitolilytica is a Gram-negative bacterium infrequently identified in clinical settings.
• This organism's resilience allows survival in liquid media and medical devices, posing a risk for hospital-acquired infections.
• Previous outbreaks have been linked to R. mannitolilytica due to its environmental persistence.

Observation:

• Three cases of bacteremia caused by R. mannitolilytica occurred in a neonatal intensive care unit in Curitiba, Southern Brazil.
• All bacterial isolates shared an identical Pulsed-Field Gel Electrophoresis (PFGE) profile, suggesting a common source.
• Surveillance cultures failed to identify the outbreak's origin.

Findings:

• All affected neonates received appropriate antimicrobial therapy.
• The clinical management resulted in successful patient discharge from the maternity ward.
• The study identified R. mannitolilytica as a potential cause of nosocomial infections in vulnerable populations.

Implications:

• Clinicians and microbiologists must be aware of emerging Ralstonia species infections.
• Enhanced diagnostic and surveillance strategies may be necessary to detect R. mannitolilytica outbreaks.
• Understanding the organism's survival mechanisms is crucial for preventing future hospital-acquired infections.