Atopy after bone marrow transplantation

( plasma recalcification time after addition of red blood cells plasma recalcification time of pooled normal plasma ) x0 The greater the percentage the greater the procoagulant activity. The plasma recalcification time was significantly decreased in the washed, packed red blood cells of patients with falciparum malaria (mean (SD) decrease 44-67 (11-97)",,; range 27-780,; n=37) compared with that in normal red blood cells (21 66 (7 50)>,; 8-36°,; n38) (p < 0-005) and those containing P vivax (26-73 (8-28)0,; 15-38",,; n7) (p < 0 05) with a similar packed cell volume. The proportion of red blood cells containing parasites ranged from 0-1 to 6-51'' in patients with falciparum malaria and from 0-2 to 4 00' in patients with vivax malaria. Subsequently, red cells containing parasites were separated out from the cells of three patients with falciparum malaria using Percoll gradient (Fine Pharmacia) as recommended.3 The increase in procoagulant activity was found to be limited to the erythrocytes containing parasites (decrease in plasma recalcification time 70-75",, in red blood cells containing parasites compared with 10-15", in red blood cells not containing parasites from the same patients). Microscopical examination of the red cells containing parasites showed both ring forms and gametocytes.