Pathogen Inactivation in Blood Product Transfusion

Pathogen inactivation in blood product transfusion encompasses a suite of techniques designed to reduce or eliminate microbial contaminants—bacteria, viruses and parasites—from platelet and plasma units prior to clinical use. These approaches complement traditional donor screening, skin disinfection, diversion of initial blood draws and bacterial culture testing. Photochemical treatments using ultraviolet A light in combination with synthetic compounds such as amotosalen intercalate into nucleic acids, preventing replication of pathogens without substantially impairing platelet function. Emerging molecular and biochemical strategies employ targeted enzymatic amplification and magnetic enrichment to detect or remove residual contaminants at low concentrations. The global adoption of these methods has led to a marked decline in transfusion‐transmitted infections, enhanced shelf-life under regulatory approval and improved safety for vulnerable patient populations.

Research from Nature Portfolio

Recent studies have demonstrated the utility of a helicase-dependent amplification assay coupled with naked-eye detection to screen platelet concentrates for bacterial contamination. This method targets a universally conserved region of bacterial 16S ribosomal RNA, achieving over 98 per cent sensitivity and full specificity compared with standard culture systems when applied after two days of storage. The assay requires only basic laboratory equipment—a simple heat block—and yields visible colour-change results within one hour. Such rapid, low-resource testing platforms promise to complement existing pathogen inactivation regimes by providing on‐site verification of bacterial safety, particularly in settings with limited laboratory infrastructure.

Pathogen Inactivation in Blood Product Transfusion publication trend

The graph below shows the total number of articles in pathogen inactivation in blood product transfusion across all publications each year (not limited to Nature Index journals).

Technical terms

Pathogen inactivation: Photochemical or other treatments that prevent replication of infectious agents in blood components.

Apheresis: A blood collection technique that separates and harvests specific components such as platelets while returning the remainder to the donor.

Helicase-dependent amplification (HDA): An isothermal nucleic acid amplification method that unwinds DNA without thermal cycling, used for rapid pathogen detection.

Colony-forming unit (CFU): A measure of viable microbial cells capable of forming colonies on a culture medium, indicating contamination levels.

Magnetic bead enrichment: A technique employing functionalised beads to capture and concentrate pathogens from fluid samples prior to detection.

References

1. Bacterial contamination of platelets for transfusion: strategies for prevention. Critical Care (2018).
2. Pathogen Inactivation of Cellular Blood Products—An Additional Safety Layer in Transfusion Medicine. Frontiers in Medicine (2017).
3. Implementation of helicase-dependent amplification with SYBR Green I for prompt naked-eye detection of bacterial contaminants in platelet products. Scientific Reports (2023).
4. Posttransfusion Sepsis Attributable to Bacterial Contamination in Platelet Collection Set Manufacturing Facility, United States - Volume 29, Number 10—October 2023 - Emerging Infectious Diseases journal - CDC. Emerging Infectious Diseases (2023).
5. Bacterial Contamination of Platelet Products. Microorganisms (2024).
6. Verification of a method using magnetic bead enrichment and nucleic acid extraction to improve the molecular detection of bacterial contamination in blood components. Microbiology Spectrum (2024).