Highlights
- •We assessed the in vitro colonization rate of stickers used for intravenous lines identification.
- •We tested different manipulation procedures to test colonization.
- •We recovered microorganisms from the manipulator hands in almost all the stickers.
- •All the stickers became colonized within 5 days.
- •Nonadhesive sides of the stickers have significantly more colony forming units than adhesive sides.
Background
Clear differentiation of arterial and intravenous (IV) lines is a safety strategy
recommended by the World Health Organization, and signaling stickers attached to IV
lines are implemented in many institutions. However, the risk of colonization of the
stickers' surface has not been evaluated. Our objective was to assess the colonization
rate of stickers used for IV lines identification in an in vitro model using 3 different
contamination degrees.
Methods
A set of 30 stickers used for IV lines identification were exposed to low, medium,
and high contamination degrees for up to 15 days. Twice a day, a single manipulator
vigorously touched the surface of the stickers simulating the daily handling. Surface
cultures of all stickers were performed daily. The microorganisms recovered were counted
and identified by phenotypic characteristics.
Results
Colonization occurred after 5 days in low and medium manipulation models and after
3 days in the high manipulation model. Nonadhesive sticker sides were associated with
greater significant numbers of colony forming units when manipulation was performed
without gloves.
Conclusion
Stickers used for the identification of IV lines may become potential reservoirs of
catheter colonization. Clinical studies to validate these data and design policies
of stickers' changes are required.
Graphical Abstract

Graphical Abstract
Key Words
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Article info
Footnotes
Financial support: M. Guembe was supported by the Fondo de Investigación Sanitaria (grant no. CP13/00268).
Conflict of interest: None to report.
Identification
Copyright
© 2014 Association for Professionals in Infection Control and Epidemiology, Inc. Published by Elsevier Inc. All rights reserved.