RESUMEN
Discriminate analysis of the estimated free fatty acids was done in this study in Biomphalaria alexandrina, Biomphalaria glabrata and Bulinus truncatus, viz. Lymnaea truncatula and Physa acute [Schistosoma intermediate and non-intermediate, respectively]. The objective of the study was to determine biochemical difference that attracts the infestation of Schistosoma miracidium to the target snails as a step of the new control trends. Caprylic acid [C8: 0] and oleic acid [C18: 1] are significantly lower in the tissues of Schistosoma intermediate snails compared to the non-intermediate snails; while capric acid [C10: 0], margaric acid [C17: 0] and linoleic acid [C18: 2] of the intermediate snails are significantly higher than that of non-intermediate snails. The percent of the correct medical classification of snails was more than 80% according to caprylic acid, margaric acid and linoleic acid and that of the other 15 fatty acids was less than 80%