Table 4.

SEC production and bacterial growth in BHI broth, milk, beef and pork meat juices assessed with ELISA.

	BHI broth				Milk				Beef meat juice				Pork meat juice
	24 h		48 h		24 h		48 h		24 h		48 h		24 h		48 h
Isolate	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL	SEC [ng/mL]	Log CFU/ mL
4S	14,001 ± 2,651	9.0 ± 0.2	35,626 ± 7,892	9.4 ± 0.1	6 ± 1	8.9 ± 0.7	9 ± 2	7.8 ± 0.1	2,283 ± 192	6.7 ± 0.3	2,979 ± 211	7.7 ± 0.2	1,256 ± 44	8.4 ± 0.2	1,877 ± 121	7.3 ± 0.2
175*	236 ± 47	9.0 ± 0.2	371 ± 36	9.5 ± 0.4	2 ± 1	8.5 ± 0.3	8 ± 1	7.8 ± 0.3	112 ± 18	6.0 ± 0.1	601 ± 2	7.9 ± 0.2	133 ± 8	7.5 ± 0.3	263 ± 18	8.4 ± 0.1
FRI137	296 ± 41	8.4 ± 0.5	30,087 ± 621	9.3 ± 0.4	131 ± 15	8.6 ± 0.4	2,319 ± 76	9.3 ± 0.3	9 ± 1	9.1 ± 0.3	15 ± 1	9.1 ± 0.4	27 ± 2	8.4 ± 0.2	43 ± 3	7.3 ± 0.3
FRI913	4,134 ± 315	9.7 ± 0.2	11,969 ± 3,793	9.8 ± 0.1	85 ± 10	9.0 ± 0.1	332 ± 62	8.7 ± 0.1	471 ± 25	9.5 ± 0.1	2,428 ± 237	9.1 ± 0.1	3,210 ± 243	8.7 ± 0.1	5,736 ± 232	9.7 ± 0.1

^*wild-type S. aureus isolate derived from food of animal origin. Positive for sec, sel, sep, enterotoxin genes.