Abstract
Mushrooms (Lentinus edodes) were processed for hot water (HWE), methanolic (ME), and polysaccharide (PSE) extracts. Polysaccharides were isolated through ion exchange (DEAE cellulose) and size exclusion (Sephadex G-100) chromatography. Monosaccharides including maltose (0.282%), glucose (0.113%), and mannose (0.451%) were identified, qualitatively and quantitatively, from the isolated polysaccharides through high-performance liquid chromatography. The whole study was divided into two experiments. Experiment 1 was meant for the evaluation of HWE and ME; whereas, experiment 2 was meant for the evaluation of PSE for immunostimulatory and immunotherapeutic activities. The cellular and humoral immune responses were demonstrated through lymphoproliferative response to phytohemagglutinin-P (PHA-P) and anti-body response to sheep red blood cells (SRBCs), respectively. The immunotherapeutic effects of these extracts were demonstrated against eimeriasis in terms of lesion scoring, oocysts per gram of droppings, and percent protection. Cell-mediated immune responses observed at 24, 48, and 72h post-PHA-P injection were significantly higher (P<0.05) in chickens administered with any of the three extracts (PSE, ME, and HWE), when compared with the controls. Humoral immune response in terms of anti-SRBCs anti-body titers was also observed higher in chickens administered with mushroom extracts. In the challenge experiment, significantly higher (P<0.05) OPG and lesion scores were observed in controls as compared to the groups administered with mushroom extracts (HWE, ME, and PSE). Significantly higher (P<0.05) percent protection against eimeriasis was observed in all groups administered with different extracts of L. edodes as compared to controls. In conclusion, L. edodes extracts showed immunostimulatory potential which persisted against eimeriasis in chicken.
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