Improving the bacteriological safety of platelet transfusions

Area of Science:

• Transfusion Medicine
• Microbiology
• Blood Banking

Background:

• Bacterial contamination of platelet concentrates is a persistent cause of transfusion-associated morbidity and mortality.
• Stored platelet products provide an optimal environment for bacterial growth due to storage temperature and composition.
• This issue represents the most common microbiological hazard in blood component transfusions.

Purpose of the Study:

• To review and discuss strategies for mitigating the risk of bacterial contamination in platelet products.
• To evaluate current and emerging methods for bacterial detection and pathogen inactivation.
• To highlight the ongoing efforts to improve the safety of allogeneic platelet transfusions.

Main Methods:

• Review of existing and proposed strategies including pretransfusion bacterial detection, contamination reduction, and pathogen inactivation.
• Discussion of automated detection systems and their limitations (time, sensitivity).
• Exploration of pathogen inactivation technologies such as amotosalen HCl plus UVA irradiation.

Main Results:

• Various approaches exist to reduce bacterial contamination, including filtration, blood diversion, and improved disinfection.
• Automated bacterial detection systems show promise but face challenges with speed and sensitivity.
• Pathogen inactivation methods, like amotosalen HCl plus UVA, are being developed and implemented.

Conclusions:

• A combination of strategies is essential for significantly reducing adverse events from bacterially contaminated platelets.
• Pathogen inactivation methodologies, particularly amotosalen HCl plus UVA, offer a viable solution.
• Continued research and implementation of these methods are expected to improve transfusion safety in the near future.