A different patter was observed for B. tenagophila (Table 2;
Fig. 2b). The glycogen content in the DG varied in infected snails,
following at hird-order polynomial regression (Fig. 2b), significantly increasing on the sixth day post-exposure (49.59%) and then declining after eleven days (5.79%) and again increasing 21days after exposure (69.54%). All the values obtained with infected snails were higher thant hose observed in uninfected animals. A similar response was observed for the glycogen concentration in the CM of infected snails on the sixth day after exposure, which increased16.19% in comparison to the uninfected snails (3.83 mg
glucose/g tissue, fresh weight). However, from this time on ward, the content of this carbohydrate fell significantly, reaching 28.20% of the content observed in uninfected B. tenagophila.