Clinico-pathological and histological observations in Oreochromis niloticus exposed to the molluscicidal activity of Anagallis arvensis

ABSTRACT

The exposure of Nile tilapia [Oreochromis niloticus] to dry powder suspension of Anagallis arvensis at concentrations of 50 ppm and 100 ppm for 24 and 48 hours was considered to study the reaction of this fish against the used plant. A. arvensis was previously succeeded as an effective molluscicide for the control of Schistosoma and Fasciola snails. The present study aimed to test the effect of the molluscicidal doses of Saboon El-Gheit [A. arvensis] on some serum parameters and some tissue histopathological observations of O. niloticus to clarify whether this plant is safe, nontoxic and fit for this type of fish or not. O. niloticus exposed to the plant suspension showed no clinical symptoms and no patho-anatomic signs externally or internally after the exposure periods and at sampling. The results revealed that the dry powder suspension of A. arvensis at molluscicidal concentrations has neither toxic nor hazardous effects for O. niloticus