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Table VII.
Microbial counts (CFU·g−1) of Pannerone cheese after 1 day and 6 days of storage at different temperatures. Number of trials at temperature of 4, 20, 25, 30 and 38 °C were respectively 3, 3, 5, 3 and 3.
Bacteria | 4 °C |
20 °C |
25 °C |
30 °C |
38 °C |
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Mean* | SDa | Mean* | SD | Mean | Median | SD | Mean | Median | SD | Mean* | SD | |
1 day | ||||||||||||
Coliforms | 3.3 × 107 | 2.2 × 107 | 9.8 × 107 | 8.2 × 107 | 1.2 × 108 | 1.3 × 108 | 5.0 × 107 | 1.8 × 108 | 8.2 × 107 | 2.4 × 108 | 9.6 × 107 | 4.0 × 107 |
E. coli | 9.8 × 105 | 7.4 × 105 | 3.6 × 108 | 5.0 × 108 | 1.3 × 107 | 3.3 × 106 | 2.2 × 107 | 1.3 × 108 | 1.3 × 106 | 2.6 × 108 | 2.6 × 107 | 3.6 × 107 |
Coagulase-positive staphylococci | 5.1 × 102 | 7.0 × 102 | 1.1 × 104 | 1.4 × 104 | 1.7 × 106 | 1.1 × 105 | 3.3 × 106 | 5.9 × 103 | 1.4 × 103 | 1.0 × 104 | 4.3 × 106 | 5.7 × 106 |
Cocci-shaped LAB | 2.4 × 108 | 3.4 × 108 | 1.1 × 109 | 3.9 × 108 | 9.9 × 108 | 8.9 × 108 | 6.5 × 108 | 6.8 × 108 | 6.3 × 108 | 6.0 × 108 | 6.0 × 108 | 8.8 × 107 |
Rod-shaped LAB | 4.1 × 104 | 5.5 × 104 | 1.6 × 106 | 2.1 × 106 | 1.7 × 105 | 1.2 × 105 | 1.3 × 105 | 6.4 × 105 | 1.9 × 105 | 1.0 × 106 | 2.1 × 106 | 2.9 × 106 |
Heterofermentative LAB | 1.0 × 104 | 0.0 × 100 | 4.1 × 105 | 5.6 × 105 | 2.8 × 106 | 5.5 × 105 | 4.8 × 106 | 4.6 × 105 | 2.5 × 105 | 6.2 × 105 | 5.1 × 106 | 7.0 × 106 |
Yeasts | 1.6 × 105 | 6.0 × 104 | 7.0 × 106 | 7.9 × 106 | 4.6 × 105 | 3.4 × 104 | 8.7 × 105 | 3.7 × 106 | 4.2 × 105 | 6.8 × 106 | 4.0 × 104 | 2.7 × 104 |
Moulds | 1.0 × 103 | 0.0 × 100 | 1.3 × 102 | 3.5 × 101 | 1.3 × 102 | 1.0 × 102 | 5.8 × 101 | 4.2 × 103 | 1.0 × 102 | 8.3 × 103 | 5.5 × 101 | 6.4 × 101 |
Lactate-fermenting clostridia spores | 7.0 × 100 | 5.7 × 100 | 2.3 × 100 | 1.8 × 100 | 1.0 × 100 | 1.0 × 100 | 0.0 × 100 | 5.6 × 100 | 5.1 × 100 | 5.3 × 100 | 2.3 × 100 | 1.8 × 100 |
Propionic acid bacteria | 1.3 × 103 | 4.2 × 102 | 1.4 × 103 | 2.0 × 103 | 1.5 × 103 | 9.0 × 102 | 1.7 × 103 | 1.1 × 103 | 8.5 × 102 | 1.2 × 103 | 4.0 × 103 | 4.5 × 103 |
6 days | ||||||||||||
Coliforms | 4.1 × 107 | 5.2 × 107 | 2.6 × 107 | 2.5 × 107 | 4.9 × 105 | 4.9 × 105 | 2.8 × 105 | 4.2 × 107 | 4.1 × 107 | 4.6 × 107 | 5.1 × 101 | 7.0 × 101 |
E. coli | 1.2 × 106 | 1.1 × 106 | 2.2 × 107 | 3.1 × 107 | 2.4 × 107 | 2.0 × 106 | 4.5 × 107 | 2.2 × 107 | 1.2 × 106 | 4.2 × 107 | 8.5 × 101 | 2.1 × 101 |
Coagulase-positive staphylococci | 1.4 × 107 | 1.9 × 107 | 1.4 × 104 | 1.6 × 104 | 1.7 × 106 | 9.4 × 105 | 1.9 × 106 | 6.9 × 106 | 7.8 × 102 | 1.4 × 107 | 5.1 × 101 | 7.0 × 101 |
Cocci-shaped LAB | 1.3 × 109 | 5.6 × 108 | 6.3 × 108 | 8.7 × 108 | 6.3 × 108 | 5.9 × 108 | 2.6 × 108 | 8.8 × 108 | 7.2 × 108 | 5.6 × 108 | 5.7 × 105 | 6.6 × 105 |
Rod-shaped LAB | 2.9 × 106 | 2.4 × 106 | 5.8 × 107 | 1.2 × 107 | 1.2 × 108 | 1.0 × 108 | 8.2 × 107 | 9.1 × 107 | 4.8 × 107 | 1.2 × 108 | 6.2 × 107 | 1.6 × 107 |
Heterofermentative LAB | 1.0 × 107 | 0.0 × 100 | 5.7 × 107 | 2.3 × 107 | 5.5 × 106 | 5.5 × 106 | 5.2 × 106 | 1.1 × 108 | 8.3 × 107 | 1.3 × 108 | 5.5 × 106 | 6.4 × 106 |
Yeasts | 6.2 × 106 | 8.7 × 106 | 1.7 × 106 | 2.3 × 106 | 2.6 × 105 | 1.3 × 105 | 3.3 × 105 | 3.2 × 106 | 1.3 × 105 | 6.1 × 106 | 5.5 × 101 | 6.4 × 101 |
Moulds | 7.5 × 102 | 3.5 × 102 | 1.8 × 105 | 2.1 × 105 | 1.3 × 105 | 1.3 × 105 | 8.7 × 104 | 1.4 × 104 | 3.8 × 102 | 2.8 × 104 | 5.5 × 101 | 6.4 × 101 |
Lactate-fermenting clostridia spores | 3.0 × 100 | 0.0 × 100 | 3.3 × 101 | 1.4 × 101 | 4.2 × 101 | 2.3 × 101 | 4.4 × 101 | 1.5 × 102 | 7.6 × 101 | 2.2 × 102 | 5.6 × 102 | 7.7 × 102 |
Propionic acid bacteria | 8.3 × 103 | 1.0 × 104 | 1.4 × 104 | 6.0 × 103 | 9.5 × 104 | 7.9 × 104 | 8.7 × 104 | 1.7 × 106 | 1.6 × 104 | 2.9 × 106 | 1.3 × 103 | 1.1 × 103 |