A report on Plasmodium vivax, Malaria and Tafenoquine

Malaria parasite connecting to a red blood cell
Main symptoms of malaria
The life cycle of malaria parasites. Sporozoites are introduced by a mosquito bite. They migrate to the liver, where they multiply into thousands of merozoites. The merozoites infect red blood cells and replicate, infecting more and more red blood cells. Some parasites form gametocytes, which are taken up by a mosquito, continuing the life cycle.
Micrograph of a placenta from a stillbirth due to maternal malaria. H&E stain. Red blood cells are anuclear; blue/black staining in bright red structures (red blood cells) indicate foreign nuclei from the parasites.
Electron micrograph of a Plasmodium falciparum-infected red blood cell (center), illustrating adhesion protein "knobs"
The blood film is the gold standard for malaria diagnosis.
Ring-forms and gametocytes of Plasmodium falciparum in human blood
An Anopheles stephensi mosquito shortly after obtaining blood from a human (the droplet of blood is expelled as a surplus). This mosquito is a vector of malaria, and mosquito control is an effective way of reducing its incidence.
Man spraying kerosene oil in standing water, Panama Canal Zone, 1912
Walls where indoor residual spraying of DDT has been applied. The mosquitoes remain on the wall until they fall down dead on the floor.
A mosquito net in use.
An advertisement for quinine as a malaria treatment from 1927.
Deaths due to malaria per million persons in 2012
Past and current malaria prevalence in 2009
Ancient malaria oocysts preserved in Dominican amber
British doctor Ronald Ross received the Nobel Prize for Physiology or Medicine in 1902 for his work on malaria.
Chinese medical researcher Tu Youyou received the Nobel Prize for Physiology or Medicine in 2015 for her work on the antimalarial drug artemisinin.
Artemisia annua, source of the antimalarial drug artemisinin
U.S. Marines with malaria in a field hospital on Guadalcanal, October 1942
Members of the Malaria Commission of the League of Nations collecting larvae on the Danube delta, 1929
1962 Pakistani postage stamp promoting malaria eradication program
Malaria clinic in Tanzania
Child with malaria in Ethiopia
World War II poster
Disability-adjusted life year for malaria per 100,000 inhabitants in 2004 no data <10 0–100 100–500 500–1000 1000–1500 1500–2000 2000–2500 2500–2750 2750–3000 3000–3250 3250–3500 ≥3500

Tafenoquine, sold under the brand name Krintafel among others, is a medication used to prevent and to treat malaria.

- Tafenoquine

This parasite is the most frequent and widely distributed cause of recurring malaria.

- Plasmodium vivax

With respect to acute malaria, it is used together with other medications to prevent relapse by Plasmodium vivax.

- Tafenoquine

Most deaths are caused by P. falciparum, whereas P. vivax, P. ovale, and P. malariae generally cause a milder form of malaria.

- Malaria

In 2013 a Phase IIb trial was completed that studied a single-dose alternative drug named tafenoquine.

- Plasmodium vivax

Treatment of P. vivax requires both treatment of blood stages (with chloroquine or artemisinin-based combination therapy) and clearance of liver forms with an 8-aminoquinoline agent such as primaquine or tafenoquine.

- Malaria

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Primaquine

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Primaquine is a medication used to treat and prevent malaria and to treat Pneumocystis pneumonia.

Specifically it is used for malaria due to Plasmodium vivax and Plasmodium ovale along with other medications and for prevention if other options cannot be used.

Primaquine is an analog of pamaquine which was the first drug of the 8-aminoquinoline class; tafenoquine is another such drug.