Table 2.
Results of the microbiological analysis of food samples belonging to food services operations A and B. The parameters analyzed for each sample were defined according to Chilean Food Regulation (RSA). Grey squares indicate that the sample meets the level or the absence of the microorganism. Black squares indicate that the food sample exceeds the parameter level required by the RSA or indicate the microorganism’s presence (Food Standards Chile, 2019 [34]). White squares indicate parameters not tested, and the regulation does not require its testing. Numbers inside black or grey squares indicate the level found in the sample for each parameter.
| APC | Enterobacteriaceae | E. coli | Salmonella spp. | S. aureus | C. perfringens | L. monocytogenes * | RSA Requirements | |
|---|---|---|---|---|---|---|---|---|
| FSOp-A | ||||||||
| Sampling Visit 1 | ||||||||
| Frozen veg mix: Corn, carrot, and string beans | 4.7 × 1036 | 10 | ND | P | APC: M = 5 × 105—Enterobacteriaceae: M = 5 × 104—Salmonella: m = 0 | |||
| Sampling Visit 2 | ||||||||
| Salad: Potato salad | 4.4 × 106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Sampling Visit 3 | ||||||||
| Frozen broccoli | >106 | 4.9 × 105 | ND | ND | APC: M = 5 × 105—Enterobacteriaceae: M = 5 × 104—Salmonella: m = 0 | |||
| Frozen avocado purée | 1.2 × 106 | 10 | <3 | ND | ND | APC: M = 5 × 105—Enterobacteriaceae: M = 5 × 105 -E. coli: M 102—Salmonella: m = 0 | ||
| Salad: Celery | >106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| FSOp-B | ||||||||
| Sampling Visit 1 | ||||||||
| Salad: Cabbage and carrot mix | 5 × 106 | <3 | ND | <10 | P | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Sampling Visit 2 | ||||||||
| Salad: Cabbage and carrot mix | 1.1 × 106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Salad: Boiled eggs and lettuce | 1 × 106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Salad: Boiled string bean | 2 × 106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Salad: Tomato and cilantro | 5.4 × 105 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Salad: Beef and mix vegetables | 1.1 × 106 | <3 | ND | <10 | <10 | ND | APC: M = 106— E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0— C. perfringens: M = 5 × 102. | |
| Salad: Cucumber | 2.2 × 107 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
| Sampling Visit 3 | ||||||||
| Dessert: Spanish custard (RTE) | 5 × 106 | <3 | ND | <10 | ND | APC: M = 106—E. coli: M = 5 × 102—S. aureus: M = 5 × 102—Salmonella: m = 0 | ||
* All samples were analyzed for L. monocytogenes. P = Presence. ND = Not detected.