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Require further optimization. In addition to viral vectors, recombinant bacterial carriersRequire further optimization. In addition to viral vectors, recombinant bacterial carriers, derived from lactic acid bacteria, Salmonella and L. monocytogenes strains, have been used extensively as delivery systems being able to stimulate both systemic [29,30] and mucosal immune responses .GENE DELIVERY
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Up as compared with the corresponding values of the control. Data presented in tables 3 show that the rats exposed to the two types of vapours encountered a significant decrease in the norepinephrine, dopamine and serotonin contents of the hippocampus as compared with the control group. On other hand, no significant changes were found in norepinephrine and serotonin between the leaded or the unlea