Stimulation of non-specific immunity, gene expression, and disease resistance in Nile Tilapia, (Linnaeus, 1758), by the methanolic extract of the marine macroalga, .

Aim: The objective of the present study was to test the immunostimulating potential of marine macroalga, , in terms of non-specific immune responses, gene expression, and disease resistance of Nile tilapia, (Linnaeus, 1758).

Materials And Methods: was injected intraperitoneally with three different doses of methanol extract of (CSME) (2 mg/kg, 20 mg/kg, or 200 mg/kg body weight), or MacroGard™ (commercial immunostimulant, positive control, and 20 mg/kg body weight), or distilled water (untreated control). In one set of fish, 5 days post-injection, serum lysozyme, myeloperoxidase, and antiprotease activities were assayed.

Polysaccharide fraction from the Indian mistletoe, Dendrophthoe falcata (L.f.) Ettingsh enhances innate immunity and disease resistance in Oreochromis niloticus (Linn.).

The polysaccharide fraction (PF) isolated from the hemiparasitic mistletoe, Dendrophthoe falcata (L.f.) Ettingsh (DF) leaves was tested for its immunostimulatory properties in Oreochromis niloticus (Linn.