Enterobacteriaceae contamination of lamb carcasses at ismailia governorate at ismailia governorate

الملخص EN

A total of 600 random samples were originated from 100 lamb carcasses, judged as fit for human consumption, directly after slaughter from Ismailia Central Abattoir.

Sterile technique was followed during sampling of lamb carcasses.

Each carcass was represented by six samples : liver, hepatic lymph node, gall bladder, lower part of small intestine, mesenteric lymph node and muscular portion of the diaphragm.

The mean values of aerobic plate counts for liver, hepatic lymph node, gall bladder, intestine, mesenteric lymph node and muscle were 5.0x104, 1.1x105, 3.5x105, 2.6x106, 4.9x105 and 3.3x104 cfu / g, respectively.

544 out of 600 (90.6%) lamb samples were positive for the presence of Enterobacteriaceae group.

The most recoded positive samples were the samples of intestine (18.4%) and mesenteric lymph node (18.4%), while the lowest recorded sample was muscle sample (14%).

The mean values of Enterobacteriaceae counts for liver, hepatic lymph node, gall bladder, intestine, mesenteric lymph node and muscle were 3.0x102, 2.0x103, 1.6x102, 4.0x104, 5.0x103 and 7.0x10 cfu / g respectively.

655 Enterobacteriaceae strains could be isolated from the examined samples at different rate.

Three strain of Salmonella and 424 strains of E.

coli could isolated and serotype from the examined lamb carcasses samples.

The significance of the obtained results and public health important of the isolated Enterobacteriaceae strains were discussed.