الفهرس 
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Abstract
This study was performed to clarify the zoonotic role of Aeromonas spp. transmitted from fish by the following points:
6.1 Identification of different Aeromonas species from the examined samples
• A total of 481 samples; 150 tilapia, 144 mullet, 85 human hand swabs and 102 stool swabs were collected in Damietta Governorate, Egypt.
• Bacteriological examination revealed that 152 (31.6%) of the samples were positive for Aeromonas spp.
• The prevalence of A. sobria, A. caviae, A. veronii and A. fluvialis in the examined samples were 9.6, 11.9, 3.1 and 1.9, respectively.
• A total of 16.4% of the isolates were confirmed as A. hydrophila by 16S rRNA gene amplification.
6.1.1 Occurrence of Aeromonas spp. in fish samples
• The overall isolation rate of Aeromonas spp. from tilapia samples was 31.3%. The rate of isolation from the viscera (25.3%) was significantly higher than muscles (6%).
• Aeromonas spp. were isolated from 48.6% of mullet fish samples. A significant percentage of infection was noticed between viscera (39.6%) and muscles (9%).
• The overall prevalence of A. hydrophila on tilapia fish was 4.7%. The rate of isolation from viscera was 2%, while from muscle was 2.7%.
• The overall prevalence of A. hydrophila in mullet was 6.3%. The rate of isolation from viscera and muscle were 6.3 and 0, respectively.