Table 2
Microbial counts in the product sample at various time points throughout the
peanut butter inoculation. Samples were plated onto tryptic soy agar with yeast
extract (TSAYE) and xylose lysine deoxycholate (XLD) agar.
Product sample Microbial survival (log CFU/g) of product a
TSAYE XLD
Inoculated peanut butter 7.4 ± 0.4 A 7.3 ± 0.4 a
Initial oil flush 6.3 ± 0.5 B 6.5 ± 1.3 b
Hot oil (t ¼ 0 min) 4.5 ± 1.0 C 4.5 ± 1.0 c
Hot oil (t ¼ 30 min) 4.0 ± 0.3 C 3.7 ± 0.5 c
Hot oil (t ¼ 60 min) 3.6 ± 0.4 C 3.6 ± 0.9 c
Hot oil (t ¼ 90 min) 3.6 ± 0.8 C 3.4 ± 1.4 c
Hot oil (t ¼ 120 min) 3.2 ± 1.2 C 3.3 ± 1.6 c
a
Different capital letters indicate significant differences (p < 0.05) between
sampling points measured on TSAYE media; different lowercase letters indicate
significant differences (p < 0.05) between sampling points measured on XLD media.