Plasmodium

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Plasmodium

 [plaz-mo´de-um]
a genus of sporozoa (family Plasmodiidae) parasitic in the red blood cells of humans and other animals; the malarial parasite. The organism is transmitted to the bloodstream of man by the bite of anopheline mosquitoes. The sporozoites migrate directly to the liver, where they develop and multiply within the parenchymal cells as merozoites, which then burst the liver cells and invade erythrocytes. Some of the merozoites develop into gametocytes, which are ingested by mosquitoes, beginning the sexual stage, which ends with the development of sporozoites. Four species, P. falci´parum, P. mala´riae, P. ova´le, and P. vi´vax, cause the four specific types of human malaria.
Life cycle of Plasmodium spp. From Mahon and Manuselis, 2000.

plasmodium

 [plaz-mo´de-um]
1. a parasite of the genus Plasmodium.
2. a multinucleate continuous mass of protoplasm. adj., adj plasmo´dial.

Plasmodium

(plaz-mō'dē-ŭm),
A genus of the protozoan family Plasmodidae (suborder Haemosporina, subclass Coccidia), blood parasites of vertebrates, characterized by separate microgametes and macrogametes, a motile ookinete, sporogony in the invertebrate host, and merogony (schizogony) in the vertebrate host; includes the causal agents of malaria in humans and other animals, with an asexual cycle occurring in liver and red blood cells of vertebrates and a sexual cycle in mosquitoes, the latter cycle resulting in the production of large numbers of infective sporozoites in the salivary glands of the vector, which are transmitted when the mosquito bites and draws blood. Primate malaria is transmitted by various species of Anopheles mosquitoes, bird malaria by species of Aedes, Culex, Anopheles, and Culiseta.
[Mod. L. from G. plasma, something formed, + eidos, appearance]

plas·mo·di·um

, pl.

plas·mo·di·a

(plaz-mō'dē-ŭm, -dē-ă),
A protoplasmic mass containing several nuclei, resulting from multiplication of the nucleus with cell division.
[Mod. L. fr. G. plasma, something formed, + eidos, appearance]

Plasmodium

/Plas·mo·di·um/ (plaz-mo´de-um) a genus of sporozoa parasitic in the red blood cells of animals and humans. Four species, P. falci´parum, P. mala´riae, P. ova´le, and P. vi´vax, cause the four specific types of malaria in humans.

plasmodium

/plas·mo·di·um/ (plaz-mo´de-um) pl. plasmo´dia  
1. a parasite of the genus Plasmodium.
2. a multinucleate continuous mass of protoplasm formed by aggregation and fusion of myxamebae.plasmo´dial

plasmodium

(plăz-mō′dē-əm)
n. pl. plasmo·dia (-dē-ə)
1. A multinucleate, often large mass of protoplasm that moves and ingests food and is characteristic of the vegetative phase of plasmodial slime molds.
2. Any of various protozoans of the genus Plasmodium, which includes the parasites that cause malaria.

plas·mo′di·al (-dē-əl) adj.

Plasmodium

[plazmō′dē·əm] pl. plasmodia
Etymology: Gk, plasma + eidos, form
a genus of protozoa, several species of which cause malaria, transmitted to humans by the bite of an infected Anopheles mosquito. Plasmodium falciparum causes falciparum malaria, the most severe form of the disease; P. malariae causes quartan malaria; P. ovale causes mild tertian malaria with oval red blood cells; and P. vivax causes common tertian malaria. See also Anopheles, blackwater fever.

Plas·mo·di·um

(plaz-mō'dē-ŭm)
A genus of the protozoan phylum Apicomplexa and the order Haemospondia, blood parasites of vertebrates; includes the causal agents of malaria, with an asexual cycle in liver and red blood cells of vertebrates, and a sexual cycle in mosquitoes, the latter cycle resulting in the production of large numbers of infective sporozoites in the salivary glands of the vector, which are transmitted when the mosquito bites and draws blood.
[Mod. L. from G. plasma, something formed, + eidos, appearance]

plas·mo·di·um

, pl. plasmodia (plaz-mō'dē-ŭm, -ă)
Protoplasmic mass with several nuclei, due to multiplication of the nucleus with cell division.
[Mod. L. fr. G. plasma, something formed, + eidos, appearance]

Plasmodium

A genus of sporozoan parasites that invade red blood cells. The genus includes the four parasites that cause MALARIA.

plasmodium

  1. any parasitic sporozoan protozoan of the genus Plasmodium, esp. P. vivax, which causes malaria. 2 the vegetative phase of slime moulds (see MYXOMYCETE).
Plasmodium genus of blood parasites, e.g. causal agent of malaria, P. vivax

Plas·mo·di·um

(plaz-mō'dē-ŭm)
A genus of the protozoan family Plasmodidae blood parasites of vertebrates; includes the causal agents of malaria in humans and other animals, with an asexual cycle occurring in liver and red blood cells of vertebrates.
[Mod. L. from G. plasma, something formed, + eidos, appearance]

Plasmodium

a genus of apicomplexan protozoa in the family Plasmodiidae parasitic in the blood cells of animals and humans; the malarial parasite. See also avian malaria.

Plasmodium berghei
occurs naturally in tree rats; transmissible experimentally to other rodents.
Plasmodium brasilianum
occurs in several monkey species, transmissible experimentally to humans and marmosets.
Plasmodium cathemerium
occurs in passerine birds including sparrows, blackbirds.
Plasmodium chabaudi
occurs in tree rats, transmissible to mice.
Plasmodium circumflexum
parasitizes a wide range of birds including passerines, Canada goose.
Plasmodium coatneyi
occurs in cynomolgus monkey; transmissible to other monkeys.
Plasmodium cynomolgi
occurs in a wide range of monkeys; transmissible to humans causing tertian type malaria.
Plasmodium durae
occurs in turkeys, transmissible to ducks.
Plasmodium elongatum
transmissible experimentally to sparrow, canaries, ducks.
Plasmodium eylesi
found in gibbon monkeys.
Plasmodium falciparum, Plasmodium malariae, Plasmodium ovale, Plasmodium vivax
the causes of the four specific types of human malaria. They are transmitted to the bloodstream of humans by the bite of anopheline mosquitoes. The sporozoites migrate and are transported via the blood stream to the liver, where they develop and multiply within the parenchymal cells as merozoites, which then burst the liver cells and invade erythrocytes. Some of the merozoites develop into gametocytes, which are ingested by mosquitoes, beginning the sexual stage, which ends with the development of sporozoites.
Plasmodium fallax
occurs in guinea fowl; transmissible to other birds.
Plasmodium gallinaceum
occurs in fowls and transmissible to some other birds; many are resistant.
Plasmodium gonderi
occurs in mandrills, mangabeys, rhesus monkeys.
Plasmodium griffithsi
occurs in turkeys.
Plasmodium hexamerium
found in passerine birds.
Plasmodium inui
found in several species of monkeys.
Plasmodium juxtanucleare
occurs in fowls; transmitted experimentally to turkeys.
Plasmodium knowlesi
occurs in several species of monkeys.
Plasmodium lophurae
occurs in pheasants; experimentally transmitted to chickens and ducklings.
Plasmodium reichenowi
occurs in chimpanzee and gorilla.
Plasmodium relictum
occurs in a variety of bird species.
Plasmodium rouxi
found in sparrows and finches.
Plasmodium schwetzi
occurs in chimpanzee and gorilla; transmissible experimentally to humans.
Plasmodium simium
occurs in howler monkeys and humans.
Plasmodium vaughani
found in many bird species.
Plasmodium vinckei
occurs in a variety of rat species; transmissible to mice.

plasmodium

pl. plasmodia [Gr.]
1. an ampicomplexan protozoon parasite of the genus Plasmodium; includes the avian malaria protozoa.
2. a multinucleate continuous mass of protoplasm.