The morphology of malaria oval in stained blood

The annular phase trophozoite parasite similar to rings P. vivax and P. malariae, but differs from them a large nucleus of irregular shape.

Возбудитель овале малярии в мазке и в толстой капле крови

Amoeboid trophozoites also have a major core. At the morula stage merozoites (8-12) randomly placed around heaps of pigment, They have a large nucleus. Gametocytes are similar to the same stage P. malariae.

Red blood cells, affected P. oval, increased, discolored, about 30 % of them are oval. Some of red blood cells one end rounded, another - extended, bakhromchatyi. The stained samples revealed erythrocytes grain James, similar to grain Schuffner's, but less abundant and larger. One can find several erythrocyte parasites simultaneously. The smear observed all stages of Plasmodium.

For each type of parasite at various stages of development characterized by the appearance of certain morphological formations, which determine their species.

  • To P. vivax characterized by increasing the size of the damaged red blood cells to the presence of grain Schuffner's, number of merozoites 8-24, amoeboid trophozoites large.
  • To P. malariae schizont when mature looks tape, infected red blood cells are not changed, number of merozoites b-12.
  • To P. sickles characterized by the presence in the blood of small annular trophozoites, crescent-shaped gametocytes, infected red blood cells are not increased.
  • In P. oval found a large grain, parasitized erythrocytes increased, often become oval, discolored. Some of red blood cells on the one hand there is a rugged, bahromchatыy end.

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