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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).
Plasmodium vivax was used between 1917 and the 1940s for malariotherapy—deliberate injection of malaria parasites to induce a fever to combat certain diseases such as tertiary syphilis. In 1927, the inventor of this technique, Julius Wagner-Jauregg , received the Nobel Prize in Physiology or Medicine for his discoveries.
Plasmodium malariae is a parasitic protozoan that causes malaria in humans. It is one of several species of Plasmodium parasites that infect other organisms as pathogens, also including Plasmodium falciparum and Plasmodium vivax , responsible for most malarial infection.
The area is endemic for malaria. The causative species is Plasmodium falciparum: there is no evidence for the presence of Plasmodium vivax. Blood grouping revealed an absence of both Fy(a) and Fy(b) antigens in two areas and a low prevalence in two others. [52] In the Yemenite Jews the frequency of the Fy allele is 0.5879. [53]
Schüffner's dots refers to a hematological finding that is associated with malaria, [1] exclusively found in infections caused by Plasmodium ovale or Plasmodium vivax. [ 2 ] Plasmodium vivax induces morphologic alterations in infected host erythrocytes that are visible by light microscopy in Romanowsky-stained blood smears as multiple brick ...
Blackwater fever is caused by heavy parasitization of red blood cells with Plasmodium falciparum. However, there have been other cases attributed to Plasmodium vivax, [1] Plasmodium malariae, [2] Plasmodium knowlesi. [3] Blackwater fever is a serious complication of malaria, but cerebral malaria has a higher mortality rate.
Plasmodium is a eukaryote but with unusual features. The genus Plasmodium consists of all eukaryotes in the phylum Apicomplexa that both undergo the asexual replication process of merogony inside host red blood cells and produce the crystalline pigment hemozoin as a byproduct of digesting host hemoglobin. [2]
Plasmodium malariae and P. knowlesi (which is the most common cause of malaria in Southeast Asia) look very similar under the microscope. However, P. knowlesi parasitemia increases very fast and causes more severe disease than P. malariae , so it is important to identify and treat infections quickly.