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Related Concept Videos

Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Disorders of Hemostasis01:24

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Coagulation01:09

Coagulation

The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...

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Related Experiment Video

Updated: Jul 7, 2026

A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting
07:27

A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting

Published on: May 16, 2013

Blood coagulation, inflammation, and malaria.

Ivo M B Francischetti1, Karl B Seydel, Robson Q Monteiro

  • 1Vector Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-8132, USA. ifrancischetti@niaid.nih.gov

Microcirculation (New York, N.Y. : 1994)
|February 9, 2008
PubMed
Summary

Malaria causes significant deaths, often involving blood coagulation issues. This study explores the procoagulant role of Plasmodium falciparum, parasitized red blood cells, and platelets in malaria pathogenesis.

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A Simple Protocol for Platelet-mediated Clumping of Plasmodium falciparum-infected Erythrocytes in a Resource Poor Setting
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Published on: May 16, 2013

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Published on: December 4, 2015

Area of Science:

  • Hematology
  • Infectious Diseases
  • Pathophysiology

Background:

  • Malaria is a major global health problem, causing over a million deaths annually.
  • Plasmodium falciparum malaria is linked to blood coagulation abnormalities like thrombocytopenia and fibrinolysis.
  • Hemorrhage is rare, suggesting a compensated coagulation activation state in malaria patients.

Purpose of the Study:

  • To review the historical literature on blood coagulation and malaria.
  • To describe mechanisms of coagulation, anticoagulation, and fibrinolysis.
  • To explain laboratory changes in disseminated intravascular coagulation (DIC) and discuss the role of tissue factor (TF) and parasitized red blood cells (RBCs) in malaria pathogenesis.

Main Methods:

  • Literature review covering historical perspectives and basic mechanisms.
  • Explanation of laboratory findings in acute and compensated DIC.
  • Discussion of tissue factor (TF) expression and the procoagulant role of parasitized RBCs and activated platelets.

Main Results:

  • Presents a Tissue Factor Model (TFM) for malaria pathogenesis.
  • TF is identified as a key interface between endothelial cell activation, coagulation disorders, and inflammation.
  • Highlights the procoagulant activity of parasitized RBCs and activated platelets.

Conclusions:

  • The coagulation-inflammation cycle is relevant to multiorgan dysfunction and coma in malaria.
  • TF plays a central role in linking parasitic infection to coagulation abnormalities and systemic complications.
  • Understanding these mechanisms is crucial for managing severe malaria.