Haemostatic Changes in Five Patients Infected with Ebola Virus

Area of Science:

• Infectious Diseases
• Haematology
• Clinical Pathology

Background:

• Limited understanding of haemostatic alterations in Ebola virus disease (EVD) due to safety and sample access challenges.
• Previous studies on EVD haemostasis are scarce, hindering effective patient management and prognosis.
• Investigating coagulation changes is crucial for understanding EVD pathogenesis and outcomes.

Purpose of the Study:

• To investigate haemostatic changes, including clotting time, fibrinogen, and D-dimer levels, in patients with Ebola virus infection.
• To compare coagulation parameters between EVD patients and healthy individuals.
• To assess the impact of sample collection methods (centrifugation vs. no centrifugation) on haemostatic markers.

Main Methods:

• Plasma samples were collected longitudinally from Ebola virus-infected patients in Sierra Leone.
• Coagulation parameters measured included prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen, and D-dimer.
• Plasma from healthy volunteers was processed with and without centrifugation to evaluate method effects.
• Statistical comparisons were made between patient groups and control groups.

Main Results:

• Ebola virus disease patients exhibited significantly higher PT, APTT, and D-dimer levels compared to healthy controls.
• Fibrinogen levels in EVD patients were normal or decreased relative to healthy individuals.
• D-dimer values were affected by sample centrifugation, while PT and APTT remained consistent.
• Elevated clotting times and D-dimer levels decreased over time in survivors.

Conclusions:

• Ebola virus infection is associated with significant procoagulant changes and potential consumption coagulopathy.
• Haemostatic markers, particularly clotting time and D-dimer, show prognostic value in EVD survivors.
• Non-centrifuged plasma can yield informative haemostasis data, facilitating monitoring in resource-limited or hazardous settings.