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Abstract
The aim of this work is to throw a light on effects of some antibacterial agents like enrofloxacin and enramycin in comparison with probiotic (Gallipro®) on the broiler performance, total count of enterobacteriacae and some biochemical parameters. The obtained results revealed that the concentration of enrofloxacin used in this study showed bad performance on broiler chicks and bad results of biochemical parameters while probiotic and other treated groups showed good performance parameters specilly when probiotic added with combination of the antibacterials which means that probiotic can be used either as alternative to antibacterial agents or in combination with them to have good broiler performance.