Preparation of immunomagnetic iron-dextran nanoparticles and application in rapid isolation of E.coli O157:H7 from foods

Table 4 Effect of incubation time on recovery (n = 5, mean±SD).

Incubation time(min)	Colony forming unit (CFU/mL)	Recovery1 (%)
5	45.80±5.63	41.26±5.07
10b	96.80±7.26	87.21±6.54
15	101.40±9.94	91.35±8.95
20	98.00±8.37	88.29±7.54
30	98.40±8.05	88.65±7.25
40	101.00±7.14	90.99±6.43
50	99.80±8.61	89.91±7.76
60	98.80±7.29	89.01±6.57

^bP<0.01 vs 5 min of incubation time.

¹There were 111 CFU/mL in the dilution (mean of five samples).