الفهرس 
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Abstract
A total of 75 samples of poultry giblets (25 of each livers, gizzards and earts) were collected from different retail shops in Alexandria city for iicrobiological examination.
The results revealed that the total aerobic count per gram of chicken livers,
chicken gizzards and chicken hearts were ranged from 5.7 X 106 to 3.1 X 108, 1 x
106 to 2.4 X 108 and 1.8 X 106 to 1.9 X 108 with mean values of 1.2 X 108 ± 1.5
X l0, 8.9 X i07 ± 1.6 X i0 and 1.1 X 108 ± 1.4 X i07 colony forming units
(CFU)/gram, respectively. The total psychrotrophic count were ranged from 1 X 106
to 2.8 X 108, 6 X 106 to 2.8 X 108 and 2 X 106 to 4.9 X 108 with mean values of
1.2 X 108 ± 1.5 X l0, 1 X 108 ± 1.7 X i0 and 1.1 X 108 ± 2.2 X CFU/g,
respectively. The total Enterobacteriaceae count were ranged from 5 X 1 to 2.4
X l0, 1 X to 2 X l0 and 7 X l0 to 1.2 X i07 with averages of4.2 X 106 ±
1.2 X 106, 1.9 X 106 ± 8.7 X and 2.9 X 106 ± 7.7 X i05 CFU/g, respectively
and the most probable number (MPN) of Coliforms were ranged from 4 X to
1.1 X 106, 4 X 1 0 to 1.1 X 106 and 3 X 1 to 1.1 X 106 with mean values of 9.3
X ± 7.8 X i0, 9.2 X i05 ± 7.4 X i04 and 9.7 X i05 ± 7.0 X i0 CFU/g,
respectively.
Furthermore, identification of Coliforms revealed that the isolated organisms were Citrobacter diversus, Citrobacter freundii, Escherichia coli (non faecal type, inactive and true faecal type), Enterobacter aerogenes, Kiebsiella oxytoca and
Kiebsiella pneumoniae subsp. ozaenae. The study revealed that the Salmonella phosa could be isolated from chicken livers, gizzards and hearts with an incidence of 16%, 12 % and 20%, respectively, while Shigella flexneri type 6 could be isolated in an incidence of 4% of each of livers and hearts while could not be isolated from chicken gizzards.
Also, other enteric organisms could be isolated and identified as Arizona, Edwardsiella ictaluri, Proteus mirabilis, Proteus rettgeri, Proteus vulgaris, Serratia ficaria, Serratia marcescns and Serratia odorifera from the examined giblets.
The total Staphylococcus aureus count/gram of chicken livers, chicken
gizzards and chicken hearts were ranged from 8 X 102 to 1 .6 X 1 0, 7.5 X 102 to
1.6 X i0 and 2 X 102 to 1.6 X 106 with mean values of 4.2 X ± 1.1 X
2.8 X i04 ± 8.4 X and 8.1 X i04 ± 4.4 X i0 CFU/g, respectively. Coagulase
positive Staphylococcus aureus could be isolated by percentage of 20%, 28 % and
36%, respectively.
The average numbers of Enterococcus faecalis per gram of chicken livers,
chicken gizzards and chicken hearts were 2.2 X 1 0 ± 8.5 X 1 1 .3 X 1 ± 1.2
x and 1.6 X i0 ± 8.8 X i04, respectively. Enterococcusfaecium were 3.2 X
i04 ± 1.3 X 9.6 X i04 ± 6.5 X i04 and 3.3 X ± 1.6 X i04 CFU/g,
respectively. Enterococcus intermediate were 9.4 X 1 ± 3.4 X 1 ü, 1.3 X 1 ü ±
1 X i05 and 1.9 X i05 ± 9.5 X i04 CFU/g, respectively.