Table 7. The reaction of α-glucosidase substrates on various media with addition of various iron sources to detect E. sakazakii in FSM 321, 2.43, 2.80, and 2.82

Oxoid Oxoid1 Oxoid2 OK VRBG VRBG1 NGTE1 NGTE2 NGTE NGTE3 NGTE4
Iron source FAC FAC FE FC X FE X FE FE FE FAC
Carbohydrate X X X X Lac Lac Glu X Glu Lac Glu
α-Glucosidase substrates Chro Mug Mug Mug Mug Mug Mug Mug Mug Mug Mug
FSM321 + + + + +
2.43 + + + + + + + +
2.80 + + + + + +
2.82 + + + + + + + +
Oxoid 1 and 2, substitution by α-MUG or iron source in Oxoid.
VRBG 1, substitution by iron source in VRBG.
NGTE 1, 2, 3, and 4: substitution by iron source or carbohydrate in NGTE.
FAC, ferric ammonium citrate; FC, ferric citrate; FE, ferrioxamine E.
Chro, 5-bromo-4-chloro-3-indolyl-α-D-glucopyranoside (BCIG).
Mug, 4-methyl-umbelliferyl α-D-glucoside (α-MUG).
X, blank; Lac, lactose; Glu, glucose.
+, positive of α-glucosidase substrates; −, negative of α-glucosidase substrates.