Roll-Plate Alone Does Not Demonstrate Colonization In Silicone Neonatal Catheters

Area of Science:

• Medical Microbiology
• Infectious Diseases
• Neonatal Care

Background:

• Catheter-related bloodstream infections (C-RBSI) are a significant concern in neonatal intensive care units.
• Accurate detection of catheter colonization is crucial for preventing C-RBSI.

Purpose of the Study:

• To compare the efficacy of three methods—roll-plate, sonication, and slicing—in detecting colonization and C-RBSI in neonatal peripherally inserted central catheters.
• To determine the most reliable method for identifying microbial presence within these devices.

Main Methods:

• Ninety silicone neonatal peripherally inserted central catheters were analyzed.
• Colonization and C-RBSI detection were performed using the roll-plate technique, sonication, and catheter slicing.

Main Results:

• Colonization detection rates varied: roll-plate (3.4%), sonication (6.9%), and slicing (10.3%).
• C-RBSI detection rates were similar across methods (4.8% each).
• The roll-plate technique demonstrated lower sensitivity for detecting both colonization and C-RBSI.

Conclusions:

• The roll-plate method is an inadequate technique for diagnosing colonization and C-RBSI in neonatal silicone catheters.
• Sonication and slicing methods offer improved detection of intraluminal colonization, which is essential for accurate diagnosis and management.