Plasmodium is a genus of parasitic, single-celled organisms that includes the parasites responsible for malaria in humans and other animals. These organisms belong to a group of parasites known as protozoa.
Several Plasmodium species cause malaria in humans, including Plasmodium falciparum, Plasmodium vivax, Plasmodium malariae, Plasmodium ovale species, and Plasmodium knowlesi. These species differ in their geographical distribution, life-cycle characteristics, and ability to cause severe disease. P. falciparum is responsible for a substantial proportion of severe malaria cases and malaria-related deaths worldwide.
The life cycle of Plasmodium involves a vertebrate host, such as a human, and a mosquito vector. In humans, the parasites initially develop in liver cells and subsequently infect red blood cells, where they multiply. In the mosquito, they undergo sexual reproduction and further development, eventually producing forms capable of infecting another host.
Some species have additional life-cycle features. For example, P. vivax and P. ovale can form dormant liver stages called hypnozoites, which may reactivate and cause malaria relapses.
QUICK FACT
Plasmodium is the genus, while Plasmodium falciparum is a particular species within that genus. In scientific writing, the genus name is capitalised and italicised; after the full name has been introduced, it can be abbreviated to P. when the meaning is clear.
COMMONLY CONFUSED WITH
- Malaria parasite: A general term for the Plasmodium organism responsible for a malaria infection.
- Malaria: The disease caused by infection with a malaria parasite.
- Plasmodium falciparum: One species within the genus Plasmodium, particularly associated with severe malaria.
SEE ALSO
- Malaria
- Malaria Parasite
- Plasmodium falciparum
- Plasmodium vivax
- Anopheles Mosquito
- Hypnozoite
