Plasmodium vivax

• Plasmodium vivax (Benign Tertian Malaria)

  • Single large ring succeeded by amoeboid form in pale large red cell
• Plasmodium vivax

  • Schuffner’s dots (Condensed hemoglobin) in red cells

  • Only reticulocytes invaded (young RBCs)
• Plasmodium vivax

  • Infected RBCs: Enlarged

  • Gametocytes: Round

  • Trophozoite: Amoeboid
• Plasmodium vivax

  • Stages seen in peripheral blood smear: ALL STAGES

  • Hypnozoites: resting stage from a secondary schizogony that occurred in the liver.
• Plasmodium vivax

  • In the developing trophozoite the presence of hemozoin (a remnant of the parasite feeding on RBC hemoglobin visible as brown pigment) becomes apparent in the cytoplasm of the parasite

  A) Plasmodium vivax Trophozoite

  
• Plasmodium vivax (Benign Tertian Malaria)

  A) Plasmodium vivax Trophozoite

  B) Hemozoin

  
• Plasmodium ovale (Benign Tertian Malaria)

  • Single compact ring

  • Jame’s Dots/ Schuffner’s dots

  • Invades young RBCs
• Plasmodium ovale

  • Infected RBCs: larger that normal, serrated and fimbriated
• Plasmodium ovale

  • Large pale red cells with schuffner’s dots which may be oval and fimbrinated.
• Plasmodium ovale

  • Hypnozoites: resting stage from a secondary schizogony that occurred in the liver.
• Plasmodium vivax serrated/fimbrated