Within the cytoplasm is a schizont
containing numerous round cross-sectioned (arrowhead) and longitudinally sectioned (arrows) merozoites (bar = 5 Hm).
and presence of Theileria piroplasm in RBC and schizont
in lymphocyte and macroschizonts in Giemsa stained lymph node biopsy smear examination.
The parasitized cells escaping splenic removal are destroyed when the schizont
Within the red blood cells, the merozoites mature either into uninucleate gametocyte or into erythrocytic stage schizont
containing 10-36 merozoites .
Merozoites ranging from 10,000 to 30,000 exit the schizont
within 60 seconds of hepatocyte invasion by sporozoites .
Theileria annulata: cross-reactions between a cell culture schizont
antigen and antigens of East African species in the indirect fluorescent antibody test.
One could speculate that the H2 minor parasite population might have emerged from a hepatic schizont
that ruptured days after those giving rise to the majority haplotypes and, despite genetic similarity, had substantial differences in surface antigenicity.
berghei sporozoites, and the extent of liver schizont
growth can be readily assessed by measuring bioluminescent signals from the liver regions of intensity (ROI) at 24 and 48 hours and the whole body region at 72 hours after intravenous sporozoite inoculation.
Phylogenetic Gene ID classification Trophozoite Schizont
Merozoite PF3D7_0204700 Clade 2 + + + PF3D7_0919500 Clade 4 nd nd nd Blood stage Gene ID Gametocyte I Gametocyte II Gametocyte III PF3D7_0204700 + + nd PF3D7_0919500 nd nd nd Mosquito/sexual stage Gene ID Gametocyte IV Gametocyte V Ookinete Sporozoite PF3D7_0204700 nd + nd + PF3D7_0919500 nd nd nd + Phylogenetic classification (see Figure 1); +: protein expression is detected; nd: not detected.
The protection engendered by the attenuated schizont
vaccine has been evaluated by laboratory challenge with live infected ticks or with ground up tick sporozoites (GUTS) inoculated through syringe passage.
The heat shock protein 90 ofEimeria tenella is essential for invasion of host cell and schizont
heteroporus, so their belonging to the latter should not be excluded (in this case, it may be a young cell, sometimes called schizont
; see Norris, 1969).