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Found worldwide, it causes a so-called "benign malaria", not nearly as dangerous as that produced by P. falciparum or P. vivax. The signs include fevers that recur at approximately three-day intervals – a quartan fever or quartan malaria – longer than the two-day (tertian) intervals of the other malarial parasite.
Malaria is caused by infection with parasites in the genus Plasmodium. [47] In humans, malaria is caused by six Plasmodium species: P. falciparum, P. malariae, P. ovale curtisi, P. ovale wallikeri, P. vivax and P. knowlesi. [48] Among those infected, P. falciparum is the most common species identified (~75%) followed by P. vivax (~20%). [15]
In general, antimalarial drugs target the life stages of Plasmodium parasites that reside within vertebrate red blood cells, as these are the stages that tend to cause disease. [34] However, drugs targeting other stages of the parasite life cycle are under development in order to prevent infection in travelers and to prevent transmission of ...
If not treated promptly, malaria can cause severe disease. Every year before the Covid-19 pandemic, about 300 people in the US developed severe malaria, and five to 10 people died each year ...
Quartan fever is one of the four types of malaria which can be contracted by humans. [1] It is specifically caused by the Plasmodium malariae species, one of the six species of the protozoan genus Plasmodium. Quartan fever is a form of malaria where an onset of fever occurs in an interval of three to four days, hence the name "quartan". [2]
In 1964, a virus, later called Epstein–Barr virus (EBV) after the discoverers, was identified from the cancer cells. The virus was subsequently proved to be the direct cancer agent and is now classified as Group 1 carcinogen. [113] In 1989, it was realised that EBV requires other infections such as malaria to cause lymphocyte transformation.
Plasmodium vivax is a protozoal parasite and a human pathogen.This parasite is the most frequent and widely distributed cause of recurring malaria. [2] Although it is less virulent than Plasmodium falciparum, the deadliest of the five human malaria parasites, P. vivax malaria infections can lead to severe disease and death, often due to splenomegaly (a pathologically enlarged spleen).
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