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Table 5 Main morphological characters of exoerythrocytic meronts of avian haemosporidian parasites

From: Exo-erythrocytic development of avian malaria and related haemosporidian parasites

Character Plasmodium Haemoproteus Leucocytozoon Akiba
Merogony in hepatocytes (Fig. 4a, b) Absent Absent Present Absent
Merogony in cells of hemopoietic system (Fig. 1h, i) Present Absent Absent Absent
Thin-walled elongate meronts in brain capillaries (Fig. 1j–l) Present Absent Absent Absent
Megalomeronts (Fig. 3c–h, Fig. 4c–h, Fig. 5a, b) Absent Present Present Present
‘Central body’ in megalomeronts (Fig. 4d–h) Absent Absent Present Absent
Extracellular development of megalomeronts (Fig. 5a, b) Absent Absent Absent Present
Prominent (more than threefold in comparison to controls) enlargement of host cell nuclei (Fig. 4d, f–h) Absent Absent Present Absent
  1. Absence of a given character in examined parasite preparations might be due to inappropriate stage of parasite development or other methodology issues, and should be treated with caution in practical work. Presence of a given character in preparations indicates taxonomic status of haemosporidians
  2. During mammalian malaria, exo-erythrocytic development occurs in hepatic cells