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. Author manuscript; available in PMC: 2010 Oct 13.
Published in final edited form as: Sens Instrum Food Qual Saf. 2010 May 4;4(2):73–81. doi: 10.1007/s11694-010-9097-x

Table 2.

Limits-of-detection (LODs) for bacterial and toxin antigens in PBST and complex food matrices using MagPlex microspheres

PBST Alfalfa Lettuce Spinach Tomato Pepper Apple juice Milk Chicken wash Ground beef
E. coli (cfu/mL) 103 105 105 105 104 103 105 105 104 105
Salmonella (cfu/mL) 106 106 104 106 107 107 106 107 106 106
Campylobacter (cfu/mL) 103 >107a >107 106 >107 107 107 107 106 107
Listeria (cfu/mL) 102 107 >107 106 104 105 104 106 106 104
SEB (ng/mL) 0.064 0.32 8.0 0.32 0.064 1.6 0.32 1.6 1.6 0.32

Bacteria LODs are measured in colony forming units per milliliter and toxin LODs in nanograms in milliliters. LODs were determined as the concentration actually measured that has a mean fluorescence signal greater the mean background fluorescence signal plus three times the standard deviation

a

Not detectable within the concentration range of 101–107 cfu/mL