Patients with blood type O receiving B or AB plasma or platelets showed a significantly higher risk of allergic transfusion reactions (ATRs) in regions with high alpha-gal syndrome prevalence. The study analyzed 558,823 transfusions across multiple countries, revealing a risk ratio of 3.93 for ATRs in high-prevalence areas compared to low-prevalence areas, as reported by the study authors.
Background
Understanding the risks associated with blood transfusions is critical for patient safety, particularly in regions with varying prevalence of conditions like alpha-gal syndrome (AGS). Allergic transfusion reactions (ATRs) can complicate transfusion therapy, and identifying risk factors is essential. This study highlights the association between blood type, transfusion products, and ATRs, particularly in patients with blood type O.
Data Highlights
Cluster Type
Risk Ratio (RR)
ATR Rate per 10,000 Transfusions
High AGS Prevalence
3.93
5 additional ATRs
Low AGS Prevalence
Not statistically significant
No excess ATRs
Key Findings
Patients with blood type O receiving B or AB products had 3.93 times the risk of ATRs in high AGS prevalence areas.
In high AGS prevalence areas, B products were associated with 4.48 times the risk of ATRs compared to O products.
Moderate to severe ATRs were 9.14 times more likely among blood type O patients receiving B products in high AGS prevalence areas.
No excess ATRs were observed in patients with blood type B receiving B or AB products.
Clinical Implications
Clinicians in regions with high AGS prevalence should be aware of the increased risk of ATRs associated with B and AB plasma or platelets in blood type O patients.
Conclusion
This study provides epidemiologic evidence suggesting that transfusion-related alpha-gal syndrome may represent a newly recognized risk for recipients of blood transfusions.
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