الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 15 |  |  |
| | | from | 15 | | |
Abstract
Several bacterial species belonging to Enterobacteriaceae are known to cause food spoilage and number of food borne diseases to human and animals. So, the present investigation was aimed for isolation, characterization and identification of bacterial isolates belonging to Enterobacteriaceae from different food substances. The recorded results could be summarized as following: A total of 308 bacterial isolates were recovered from eighty samples of four food substances named: arugula (Eruca sativa), lettuce (Lactuca sativa), milk and ground beef collected from different markets located in Suez governorate, Egypt. According to total bacterial count on nutrient medium, lettuce had the highest count (551200x105 cfu g-1) followed by arugula (50930x105 cfu g-1), ground beef (2610x105 cfu g-1) and milk (1840x105 cfu ml-1). Also, according to total bacterial count on MAC medium, lettuce was the highest (291300x105 cfu g-1) followed by arugula (29000 x105 cfu g-1), milk (1420 x105 cfu ml-1) and ground beef (1250x105 cfu g-1). Enterobacteriaceae had the highest count than Pseudomonas spp. in the four food substances especially lettuce and arugula. According to the bacterial species that recovered on MAC medium, group A that represented by Enterobacter cloacea No. 2059 had the highest count with (37.66%) for arugula, 52.25% in lettuce, 37.25% in milk and 19.84% in ground beef. group B that represented by Pseudomonas monteilii No. 2012 had count with 11.72% in arugula, 15.1% in lettuce, 23.66% in milk and 34.4% in ground beef. Then group C represented by Pseudomonas aeruginosa No. 3001 with.