p. 227 - 234 LES EFFECTS SPECIFIQUES AU NIVEAU CELLUAIRE DE L'EXTRAIT DE Brachionus plicatilis 1) I. Neacsu, V. Craciun 1), Margareta Craciun 1) et Teodora Onciu 2) 1) Biological Research Center Iasi 2) Institut Roumain de Recherches Marines Constanta Abstract The paper deals with the results of the experimental researches concerning the effect of total extract of Brachionus plicatilis on the membrane potential and on some pathological microorganisms.