Malaria classification On the Web
American Roentgen Ray Society Images of Malaria classification
The classification of malaria can be established according to the strains of Plasmodium species. There are five common Plasmodium species that infect humans: P. falciparum, P. ovale, P. vivax, P. malariae, and P. knowlesi. Malaria can also be classified according to severity of infection: uncomplicated vs. severe.
Classification by Plasmodium Strain
|Strain||Appearance of Erythrocyte (RBC)||Appearance of Parasite||Clinical Significance|
||Tertian/subtertian fever (every 48 hours), causes severe malaria in up to 24% of cases, and is frequently drug resistant.|
Tertian fever (every 48 hours), results in severe malaria in up to 22% of cases, and is frequently drug resistant. Relapse is common due to the dormant liver phase.
|P. ovale||Normal with fine Schüffner dots||Tertian fever (every 48 hours), rarely causes severe malaria or drug resistance. Relapse is common due to dormant liver phase.|
|P. malariae||Normal with Ziemann's stippling||
||Quartan fever (every 72 hrs), rarely results in severe malaria or drug resistance. Although dormant liver phase is uncommon, infection persistence is frequently demonstrated.|
|P. knowlesi||Normal with Sinton and Mulligan stippling||
||Daily fevers, may result in severe malaria in up to 10% of cases, although resistance is rare.|
Classification by Severity of Infection
The following table classifies malarial infections by severity.
Attack lasts 6-10 hours consisting of 3 stages:
Malaria is complicated by organ damage and is considered a medical emergency that requires prompt hospitalization.
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- ("Malaria". Center for Disease Control and Prevention. Center for Disease Control and Prevention (CDC). Nov. 29 2013. Retrieved Jul 24 2014. Check date values in:
- "Malaria". Center for Disease Control and Prevention. Center for Disease Control and Prevention (CDC). Nov. Feb 8 2010. Retrieved Jul 24 2014. Check date values in: