To date however, the effect of an intestinal adult tapeworm on leucocyte migration from the pronephros has not been ascertained.
Either of the last 2 mechanisms would enhance leucocyte adhesion and hence phagocytosis or encapsulation.
In addition, it has been proposed that fish leucocytes are able to induce death of a target organism by apoptosis.
The leucocytes were markedly increased on the two days preceding the day when the horse died.
Tissue macrophages which differentiate from blood-borne monocytes, large granular lymphocytes and polymorphonuclear leucocytes are the main cell types involved in nonadaptive immunity.
Histology reveals typical mushroom-like pseudomembranes, comprising fibrin, mucus, leucocytes and cellular debris.
Ultrastructural examination of living plerocercoids revealed that adherent leucocytes caused little damage, only phagocytosing some microthrix spines.
Even when the immune system is in the resting state, large numbers of leucocytes continue to be produced.
