[Alteration in superficial anionic charge of erythrocytes and desialated erythrocytes caused by Ascaris lumbricoides].

Introduction: Sialic acid of the erythrocytes has hemorreologic and hemodynamic importance, so its reduction causes erythrocyte aggregation and low blood flow.

Objective: To study the effect of A. lumbricoides on the anionic charge of erythrocytes and of desialated erythrocytes, taking the time of contact of the erythrocytes with parasite extracts into account.