Table 6. Biofilm production by B. cereus isolates.

Isolate No.	Code	Qualitative detection	Biofilm production (OD)	Negative control (ODC)	Average reading
1	Mm 3	Black	2.784	0.691	+++
2	Bk 4	Black	0.925	0.462	++
3	Sh 6	Red	0.709	0.589	+
4	Mm 8	Black	0.642	0.421	+
5	Bb 12	Black	1.301	0.649	++
6	S 20	Red	0.587	0.344	+
7	Mm 26	Black	1.054	0.524	++
8	BL 27	Red	0.455	0.396	+
9	Sh 30	Black	1.736	0.409	+++
10	Bl 31	Red	0.786	0.599	+
11	Bk 33	Black	0.629	0.437	+
12	S 34	Black	1.864	0.441	+++

Mm: Minced meat, Sh: Shawarma, Bb: Beef burger, Bk: Beef kofta, Bl: Beef Luncheon, S: Sausage. OD, optical density; ODC, Cut-off optical density (OD of negative control + 3×SD of negative control); +, weak; ++, moderate; +++, strong. The data represents ELISA reading at OD at 545 nm. Black indicates biofilm production, while red indicates no biofilm production.