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Plasmodium vivax pre-erythrocytic stage
- Molecular classification
- Protozoan parasite, Multi-antigen complex
01
Overview
The Plasmodium vivax pre-erythrocytic stage encompasses the parasite's development within hepatocytes, following transmission by a mosquito and preceding the blood-stage infection. This crucial stage involves sporozoite invasion, schizont formation, and the unique generation of dormant hypnozoites, which are responsible for relapses. Targeting this stage is vital for malaria prevention and eradication, focusing on sporozoite blocking or hypnozoite elimination.
- Other names
- P. vivax liver stagePlasmodium vivax sporozoite stagePlasmodium vivax hypnozoite stage
02
Mechanism of action
Primaquine and tafenoquine target and eliminate hypnozoites, preventing relapse. Pre-erythrocytic vaccines aim to prevent sporozoite invasion or eliminate infected hepatocytes.
03
Biological functions
Hepatocyte invasionReplicationMerozoite productionHypnozoite formationDormancyRelapse
04
Disease associations
MalariaRelapsing malaria
05
Safety considerations
Primaquine and tafenoquine: G6PD deficiency contraindicationHypnozoite eradication requires complete adherence to treatment regimensVaccine development is challenging due to the complexity of the liver stage and hypnozoite biology
06
Interacting drugs
Primaquine
2 more in the full profile.
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