from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The protozoan (Plasmodium vivax) that causes the most common form of malaria.
  • n. Malaria caused by this protozoan, characterized by the occurrence of febrile paroxysms about every 48 hours.


from The American Heritage® Dictionary of the English Language, 4th Edition

From New Latin vīvāx, specific epithet, from Latin, lively; see vivacious.


  • P. vivax, which is increasingly resistant to some antimalarial drugs, is the species most common outside Africa, particularly in Asia and the Americas, including the United States, the site of periodic outbreaks.

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  • As far as I know, the main malarial disease agent in Britain during the LIA was vivax which is the least lethal form of the disease mind you even this form is unpleasant.

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  • P. falciparum causes the most severe symptoms, P. vivax which is characterized by profound anemia, enlargement of the spleen, emaciation, mental depression, sallow complexion, edema of ankles, feeble digestion, and muscular weakness

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  • Bolton's was aimed simply at showing that researchers could infect people with Plasmodium vivax, one of the five strains of the malaria parasite.

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  • Some of the different malaria parasites include Plasmodium vivax, P. malariae, P. falciparum and P. ovale.

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  • - _P. vivax_ predominates until August, with _P. falciparum_ infection rising to a peak in September.

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  • WHO reports risk is almost exclusively in P. vivax form.

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  • There, P. vivax might be more prevalent because it is more tolerant of lower ambient temperatures.


  • Classically, but infrequently observed, the attacks occur every second day with the "tertian" parasites (P. falciparum, P. vivax, and P. ovale) and every third day with the "quartan" parasite (P. malariae).


  • Mature Plasmodium vivax schizont containing 18 merozoites.



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