Table 3.
Microbial results of feed and black soldier fly larvae grown on three different feeds after being frozen and blanched (log cfu/g).
| F1 | F2 | F3 | BSFL F1 B | BSFL F1 F | BSFL F2 B | BSFL F2 F | BSFL F3 B | BSFL F3 F | |
|---|---|---|---|---|---|---|---|---|---|
| Total viable count | TNTC | TNTC | TNTC | 2.1 b ± 0.3 | 5.5 a ± 0.4 | 2.2 b ± 0.00 | 5.5 a ± 0.9 | 2.2 b ± 0.1 | 5.5 a ± 0.8 |
| Bacillus cereus | 5.5 ± 0.5 | 5.5 ± 0.6 | 5.5 ± 0.5 | 1.7 c ± 0.0 | 2.0 b ± 0.01 | 2.0 b ± 0.2 | 2.2 c ± 0.0 | 2.0 b ±0.2 | 2.0 b ± 0.2 |
| Escherichia coli | 4.5 ± 0.00 | 4.5 ± 0.1 | 4.5 ± 0.00 | 1.5 b ± 0.8 | 4.5 a ± 0.5 | 1.5 b ± 0.00 | 4.5 a ± 0.5 | 1.3 b ± 0.8 | 4.5 a ± 0.00 |
| Salmonella spp. | ND | ND | ND | ND | ND | ND | ND | ND | ND |
| Listeria spp. | ND | ND | ND | ND | ND | ND | ND | ND | ND |
ND—None detected; TNTC—too numerous to count. F1 = Feed 1 Broiler-based; F2 = Feed 2 Brewers grain; F3 = Feed 3 Cereal grain; B—Blanched, F—Frozen. a–c Means of treatments with different superscripts in each row differ significantly (p < 0.05).