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In vivo platelet aggregation in acute malaria
E E Osim1, B J Adegunloye, A O Emeribe
1Department of Physiology, College of Medical Sciences, University of Calabar, Nigeria.
Abstract:
Thirteen patients suffering from acute malaria attack and thirteen apparently healthy human volunteers (control) were used for the study. Platelet aggregation was determined by platelet count ratio technique in which a reduction in platelet count ratio signified an increase in platelet aggregation. Platelet count ratio in acute malaria patients was 0.75 +/- 0.03 (SEM). Platelet count ratio in subjects used as control was 0.88 +/- 0.02. This value was significantly higher than the former (P less than 0.001). Platelet count ratio correlated negatively with the degree of parasitaemia (r = -0.71; P less than 0.01). ADP, a platelet aggregating drug, also reduced platelet count ratio in rats significantly. Acute malaria attack therefore enhances platelet aggregation in vivo.
Insights
Acute malaria attacks significantly increase platelet aggregation in patients. This study found reduced platelet count ratios in malaria patients compared to healthy controls, indicating enhanced platelet activity.
Area of Science:
- Hematology
- Infectious Diseases
- Malariology
Background:
- Malaria is a significant global health concern.
- Platelet function alterations are observed in various infectious diseases.
- The specific impact of acute malaria on platelet aggregation requires further elucidation.
Purpose of the Study:
- To investigate platelet aggregation in patients experiencing acute malaria attacks.
- To compare platelet aggregation in malaria patients with healthy controls.
- To determine the correlation between platelet aggregation and malaria parasitemia levels.
Main Methods:
- Platelet aggregation was assessed using the platelet count ratio technique.
- A cohort of 13 acute malaria patients and 13 healthy volunteers was studied.
- Platelet count ratios were measured and compared between groups.
Main Results:
- Platelet count ratio was significantly lower in acute malaria patients (0.75 +/- 0.03) compared to controls (0.88 +/- 0.02) (P < 0.001).
- A significant negative correlation was observed between platelet count ratio and parasitemia (r = -0.71; P < 0.01).
- Administration of adenosine diphosphate (ADP) in rats also demonstrated a reduction in platelet count ratio, confirming its aggregating effect.
Conclusions:
- Acute malaria attacks enhance platelet aggregation in vivo.
- Increased platelet aggregation may contribute to the pathophysiology of malaria.
- Further research into the clinical implications of malaria-associated platelet activation is warranted.