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Influence of Aspergillus terreus infested feed on the growth and metabolism of chick was investigated. The relative weight gain of different organs and feed intake gradually decreased with the increased amount of intake of infested feed. Serum Glutamate Pyruvate Transaminase (SGPT) and Serum Glutamate Oxaloacetate Transaminase (SGOT) activities and bilirubins increased with increase of intake of A. terreus infested feed, indirectly with territrem B intake. However, proteins, iron, urea, calcium and albumins with increased exposure to A. terreus infested feed. Different biochemical components of blood also decreased with increased A. terreus infested feed intake by the chicks.

Production of phytase by three thermophilic fungi, Thermomyces lanuginosus, Talaromyces luteus and Rhizomucor pusillus under different cultural conditions was assessed. Temperature of 45°C, pH-6.0 were optimum for phytase production by the all three fungi under investigation . Carbon and nitrogen sources for production of phytases by the three thermophilic fungi varied with the fungus. When T. lanuginosus opted for D-glucose followed by D-fructose, T. luteus preferred D-glucose, D-mannose and mannitol for production a phytase. On the other hand, R. pusillus produced maximum phytase during its growth on mannitol and maltose as carbon source. L- asparagine, L- arginine and L-asparatic acid were preferred nitrogen sources for production of phytase by T. lanuginosus. On the other hand T. luteus, opted for L- asparagine, L-glutamic acid and L- glycine for the activity of phytase. R. pusillus produced maximum phytase in medium containing L-argine, L-asparagine and L- asparatic acid.

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