Convalescent plasma
Convalescent Plasma Therapy
Convalescent plasma therapy is a form of passive immunity that involves the transfusion of plasma collected from individuals who have recovered from an infectious disease to patients currently battling the same disease. This therapy is based on the principle that the antibodies present in the convalescent plasma can help fight the infection in the recipient.
History
The use of convalescent plasma dates back to the early 20th century. It was first used during the Spanish flu pandemic of 1918-1919. Since then, it has been employed in various outbreaks, including Ebola virus disease, SARS, and MERS.
Mechanism of Action
Convalescent plasma contains antibodies that are specific to the pathogen causing the disease. When transfused into a patient, these antibodies can neutralize the virus or bacteria, thereby aiding the patient's immune system in clearing the infection. This form of therapy is particularly useful when no specific antiviral drugs or vaccines are available.
Applications
Convalescent plasma therapy has been used in the treatment of several infectious diseases, including:
Risks and Considerations
While convalescent plasma therapy can be beneficial, it is not without risks. Potential complications include:
- Allergic reactions
- Transfusion-related acute lung injury (TRALI)
- Transfusion-associated circulatory overload (TACO)
- Transmission of infectious agents
Regulatory Status
The use of convalescent plasma is subject to regulatory approval and guidelines, which vary by country. In the United States, the Food and Drug Administration (FDA) has provided emergency use authorization for convalescent plasma in certain situations.
Research and Efficacy
Ongoing research is evaluating the efficacy of convalescent plasma therapy in various infectious diseases. Clinical trials are essential to determine the optimal timing, dosage, and patient selection criteria for this treatment.
See Also
References
External Links
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