The effect of Bombyx mori nuclear polyhedrosis virus (BmNPV) on biochemical changes of TC-100 medium containing 10% fetal bovine serum (FBS) in embryonic primary cultures of silkworm was investigated. The primary cultures that reached 60% confluence were infected by 0.5, 1, and 2-ml viral inoculums (diluted with TC-100 medium representing multiplicity of infection (MOI) of 0.25, 0.5, and 1). Glucose, uric acid, urea, total protein, cholesterol, and alkaline phosphatase were measured in the medium of BmNPV-infected primary cultures. All biochemical compounds showed significant changes. Glucose decreased considerably by about 55 mg/ml, while different concentrations of the virus inoculums did not demonstrate significant differences among them. Total protein had only increased in 2 ml concentration and there were no changes in other concentrations. Uric acid as a by-product accumulated dramatically in all concentrations, while the amount of urea reduced in all treatments and this reduction was more evident in lower concentrations. Cholesterol consumption was high in cultures postinfection, while alkaline phospha-tase (ALP) activity decreased in infected cells.
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Vol. 44 • No. 3