Table 3. Colonial morphology, gram stain and biochemical results of milk samples from the supermarkets.

Identification number	Isolate	Blood agar	MacConkey's agar	Gram stain	K	U	C	M	I	L	Organism identified
SCr017	A	circular dull a-hemolytic colonies	Irregular flat dull mucoid LF colonies	Small GNB in pairs	A/ A-G	+	-	-	-	-	Enterobacter species
	B	Cream non hemolytic colonies	Irregular flat dull mucoid LF colonies	Small GNB in pairs	A/A-G	-	+	-	-	-	Enterobacter species
	C	Small grey shiny opaque butyrous a-hemolytic colonies	Small raised shiny LF colonies	Short GNB	A/A	-	-	-	-	-	Enterobacter species
SID020	A	Cream non hemolytic colonies	Irregular flat dull mucoid LF colonies	Large thick GNB	A/A	-	+	-	-	-	Enterobacter species
	B	Round cream flat circular dull a-hemolytic colonies	Irregular flat dull mucoid LF colonies	Large thick GNB	A/A-G	-	+	-	-	-	Enterobacter species
SCre017	A	Small cream colonies non hemolytic	Irregular flat dull LF colonies	GNB	A/A-G	-	+	-	-	-	Enterobacter species
	B	Small cream circular raised opaque dull non-hemolytic colonies	Small raised shiny LF colonies	GNB	A/A	-	+	+	-	-	Enterobacter species
SCr020	A	Small circular raised,cream a-s hemolytic colonies	Raised mucoid LF colonies	Short GNB	A/A	-	+	+	_	-	Enterobacter species
	B	Small circular raised opaque dull B-hemolytic colonies	Irregular flat dull LF colonies	Short GNB	A/A	-	-	+	-	-	Enterobacter species
SID017	A	Small circular raised,cream non hemolytic colonies	Large irregular shiny butyrous LF colonies	GNB	A/A	+	+	+	-	-	Enterobacter species
	B	Irregular raised cream shiny butyrous a-hemolytic colonies	Large irregular flat dull LF colonies	GNB	A/A	+	+	+	-	-	Enterobacter species
CDa025	A	Cream non hemolytic colonies	Raised mucoid LF colonies	Short GNB	A/A	-	+	+	_	+	Enterobacter species
	B	Small circular raised opaque dull B-hemolytic colonies	Irregular flat dull LF colonies	Short GNB	A/A-G	-	-	+	-	-	Enterobacter species
LCr021	A	Large circular raised beta hemolytic colonies	Raised mucoid LF colonies	GNB	A/A	-	-	+	+	+	Escherichia coli
	B	Large cream convex circular opaque dull a-hemolytic colonies	Large irregular flat dull LF colonies	Short GNB	A/A	-	-	-	-	-	Enterobacter species
LCr017	A	Cream circular non hemolytic colonies	Convex circular shiny butyrous LF colonies.	GNB	A/A-G	+	+	+	-	+	Enterobacter species
	B	Small beta hemolytic colonies	Irregular raised dull serrated LF colonies	Large thick GNB	A/A	+	+	-	-	-	Enterobacter species
	C	Small circular raised opaque cream colonies	Irregular raised dull serrated LF colonies	Short thick GNB	A/A	-	-	-	-	-	Enterobacter species
BCr016	A	Small circular raised,cream non hemolytic colonies	Large irregular shiny butyrous LF colonies	GNB	A/A	+	+	+	-	-	Enterobacter species
	B	Irregular raised cream shiny butyrous a-hemolytic colonies	Large irregular flat dull LF colonies	GNB	A/A	-	+	+	-	-	Enterobacter species
CDa025	A	Cream non hemolytic colonies	Raised mucoid LF colonies	Short GNB	A/A	-	+	+	_	+	Enterobacter species
	B	Small circular raised opaque dull B-hemolytic colonies	Irregular flat dull LF colonies	Short GNB	A/A-G	-	-	+	-	-	Enterobacter species

K: kligler; C: Citrate; I: Indole; U: urea; M: motility; L: Lysine.