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Updated: Aug 24, 2026

Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
Published on: July 11, 2016
Morganella morganii causing fatal sepsis in a platelet recipient and also isolated from a donor's stool
B Golubić-Cepulić1, A Budimir, V Plecko
1Department of Transfusion Medicine, Clinical Hospital Centre Zagreb, Zagreb, Croatia. bgolubic@kbc-zagreb.hr
Abstract:
Bacterial contamination of blood products causes significant patient morbidity and mortality. Contaminated platelet transfusion is a frequent cause of bacteraemia and sepsis because of the storage conditions of platelets. A fatal case of Morganella morganii platelet transfusion associated with sepsis is described, along with procedures traced back to the isolation of M. morganii from a donor's stool. Molecular typing was performed, and the same M. morganii strain was found in blood and post-mortem organ cultures of platelet recipient and platelet bag and in the donor's stool. The route of contamination is unknown. The contamination could be due to either insufficient venipuncture site disinfection or the donor's transient bacteraemia. Patient died 5 days after the transfusion.
Insights
Bacterial contamination in platelet transfusions can lead to sepsis. A fatal case highlights the risk of Morganella morganii transmission from donor to patient, emphasizing transfusion safety concerns.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Transfusion Medicine
Background:
- Bacterial contamination of blood products poses a significant risk to patient health, leading to morbidity and mortality.
- Platelet transfusions are particularly susceptible to bacterial contamination due to storage conditions, increasing the risk of transfusion-associated sepsis.
Observation:
- A fatal case of sepsis following a platelet transfusion is presented.
- The sepsis was caused by Morganella morganii, a bacterium isolated from the donor's stool and the patient's blood and organs.
Findings:
- Molecular typing confirmed the same strain of Morganella morganii was present in the donor's stool, the platelet bag, and the patient.
- The exact route of contamination remains undetermined, with possibilities including inadequate venipuncture disinfection or transient bacteremia in the donor.
Implications:
- This case underscores the critical need for stringent safety protocols in blood product collection and transfusion to prevent bacterial contamination.
- Enhanced screening and donor vigilance are essential to mitigate the risk of transfusion-transmitted infections and associated fatalities.
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