الفهرس 
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Abstract
The present study was carried out to study the effect of Extracted jojoba meal as antibacterial in vitro on some microbial agents. Four hundred and eighty fish of O. niloticus weighting (40-45g) were used in this study.
The results obtained were as follows: Effect on hematological parameters:
It was found that feeding of O.niloticus on basal diet containing extracted jojoba meal with concentration (0.5g/kg,1g/kg and 2g/kg) of feed and feeding of O.niloticus on basel diet containing replacing jojoba meal instead of soya mean meal with 25% and 50 % replacement for 90 days afforded a significant increase in RBCS count, Hb %, PCV%, WBCS counts and its differential counts when compared with control groups along the course of the study (90 days)
Effect on biochemical parameters: a significant increase in serum total protein, albumin, globulin and decrease in A/G ratio when compared with controls group along the course of the study (90 days).
Effect on some immune response parameters: a significant increase in NBT, IgM, antibody titer, Lysozyme activity and Phagocytic activity when compared with controls group along the course of the study (90 days)
Effect on antioxidant parameters: a significant increase in SOD, CAT, when compared with controls group along the course of the study (90 days), Except MDA which showed significant increase in control groups when compared with other experimental groups.
Effect on mortality rate: a significant decrease in mortality rate when compared with positive control group along the course of the study (90 days).
Antibacterial activity: It was found that the extracted jojoba meal with concentration possessed antibacterial effect by inhibiting growth of the tested bacterial microbe when applied in vitro.