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A parainfluenza-3 outbreak in a SCT unit: sepsis with multi-organ failure and multiple co-pathogens are associated
A Hodson1, M Kasliwal, M Streetly
1Department of Haematology, Guy's and St Thomas' NHS Foundation Trust, London, UK.
Abstract:
The estimated frequency of parainfluenza virus 3 (PIV-3) infections following haematopoietic SCT (HSCT) is 2-7%, whereas reported mortality ranges from 18 to 33%. We report a retrospective outcome analysis following an outbreak of PIV-3 infection in our transplant unit. A total of 16 HSCT patients developed PIV-3 infection. All patients had upper respiratory tract infection, whereas lower respiratory tract infection occurred in 8 patients. Overall, 13 patients were treated with aerosolised Ribavirin (2 g t.d.s. for 5 days) and i.v. Ig (0.5 g/kg) as per standard protocol. One patient refused treatment, whereas two patients with full immune reconstitution were not treated. Overall mortality was 62.5%. Sepsis with multi-organ failure and the presence of pulmonary co-pathogens were both significantly associated with PIV-3-related mortality. Our series confirms that high mortality is associated with PIV-3 infection in HSCT recipients. In patients who develop PIV-3 infection, despite strict enforcement of infection control policies, the best strategy might be careful risk assessment, with effective broad-spectrum anti-microbials in those who are at risk of secondary infection.
Insights
Parainfluenza virus 3 (PIV-3) infections pose a high mortality risk in hematopoietic stem cell transplant (HSCT) recipients. Prompt risk assessment and broad-spectrum antimicrobials are crucial for managing PIV-3 in these vulnerable patients.
Area of Science:
- Infectious Diseases
- Hematology
- Transplant Medicine
Background:
- Parainfluenza virus 3 (PIV-3) is a significant pathogen following hematopoietic stem cell transplantation (HSCT).
- Reported PIV-3 infection rates post-HSCT range from 2-7%, with mortality between 18-33%.
Purpose of the Study:
- To analyze outcomes of PIV-3 infection during an outbreak in a transplant unit.
- To identify factors associated with mortality in HSCT patients with PIV-3 infection.
Main Methods:
- Retrospective outcome analysis of 16 HSCT patients diagnosed with PIV-3 infection.
- Evaluation of treatment protocols including aerosolized Ribavirin and intravenous immunoglobulin (IVIG).
- Statistical analysis to determine factors associated with PIV-3 related mortality.
Main Results:
- All 16 patients experienced upper respiratory tract infections; 8 developed lower respiratory tract infections.
- Overall mortality was 62.5%, significantly higher than previously reported.
- Sepsis with multi-organ failure and pulmonary co-pathogens were significantly associated with increased mortality.
Conclusions:
- PIV-3 infection carries a high mortality rate in HSCT recipients.
- Despite infection control, PIV-3 remains a threat.
- Risk assessment and prompt broad-spectrum antimicrobial use are recommended for high-risk patients to mitigate secondary infections and mortality.
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