Good Manufacturing Practices and Microbial Contamination Sources in Orange Fleshed Sweet Potato Puree Processing Plant in Kenya
Table 2
Microbial Counts on equipment surfaces in OFSP puree processing plant1 (log Mean CFU⋅cm−2).
Sample
TVC
Yeast-molds
S. aureus
Enterobacteriaceae
Coliforms
E. coli
OFSP buckets
7.71 ± 0.24
6.79 ± 0.45
5.08 ± 0.32
7.33 ± 0.09
6.51 ± 0.10
5.29 ± 0.75
OFSP scrub brushes
7.83 ± 0.02
6.32 ± 0.01
4.52 ± 0.21
7.28 ± 0.03
6.44 ± 0.13
4.34 ± 0.15
Knives
6.57 ± 0.32
4.35 ± 0.29
5.06 ± 0.13
6.24 ± 0.02
5.51 ± 0.15
4.79 ± 0.33
Tables
8.12 ± 1.24
5.73 ± 1.13
4.44 ± 0.84
6.71 ± 0.07
6.35 ± 0.54
2.16 ± 3.74
Cooling trays
7.45 ± 1.37
4.74 ± 0.27
4.68 ± 0.55
5.83 ± 1.20
5.45 ± 1.16
2.68 ± 2.10
Puree machine
7.63 ± 0.81
4.29 ± 1.03
4.43 ± 0.63
6.34 ± 0.45
5.58 ± 0.20
2.04 ± 2.23
Weighing spoons
9.47 ± 0.03
6.45 ± 0.08
5.41 ± 0.14
6.43 ± 0.10
6.17 ± 0.12
1.81 ± 2.57
Packaging bags
6.28 ± 0.09
4.83 ± 1.35
3.16 ± 0.43
5.83 ± 0.64
5.65 ± 0.73
nd
Packaging machine
9.10 ± 0.74
6.15 ± 0.51
5.15 ± 0.04
6.77 ± 0.05
6.45 ± 0.02
3.58 ± 0.08
Freezers
7.46 ± 0.13
5.95 ± 0.83
4.89 ± 1.53
6.64 ± 0.11
6.32 ± 0.40
1.21 ± 2.11
Cold boxes
7.97 ± 0.13
5.48 ± 0.55
5.65 ± 0.11
6.27 ± 0.17
5.58 ± 0.24
4.36 ± 0.76
Shipment vehicle
8.33 ± 0.01
5.28 ± 0.00
6.45 ± 0.02
7.43 ± 0.03
6.68 ± 0.01
4.70 ± 0.96
All values reflect mean counts and standard deviation. Values bearing different superscript letters in each column are significantly different (); TVC: total viable counts; nd: microbial parameter not detected.
