Fig. 5

Direct effects of spirulina and linoleic acid on cercariae. A Concentration-dependent effects of each feed on cercariae. B Photograph showing morphological changes at 1 and 4 h after the administration of 0.125 mg/ml spirulina to cercariae. C Photograph showing morphological changes at 1 h after the administration of 5% linoleic acid + base feed to cercariae