Table IV.
Scenarios
| # | Descriptions of the Scenario | Compliance with Exclusion Time Pc/P NC;1/P NC;2 /P NC;3 (%) | Exclusion Period after Symptom Resolution | Compliance with Exclusion | Compliance with Handwashing in Restrooms | Compliance with Handwashing When Engaging in Food Preparation | Compliance with Wear Gloves When Engaging in Food Preparation | Compliance with Change Gloves When Engaging in Food Preparation |
|---|---|---|---|---|---|---|---|---|
| 1 | Baseline Scenario: FE‐1 is ill, FE‐2 and FE‐3 are asymptomatic shedders in 15% of the stores. Restrooms and NFCS are washed before shift each day. FCSs are washed every four hours. Current practices regarding level of compliance with exclusion from work of 24 hours after symptom resolution + current practice with regard to level of compliance with handwashing in restrooms, handwashing when engaging in food preparation, and glove use when engaging food preparation.a | 74 / 6.0 / 7.0 / 13 | 24 hours | Currenta | Current | Current | Current | Current |
| 2 | Baseline + no ill food employees, FE‐1, FE‐2, and FE‐3, are asymptomatic shedders in 15% of the stores. | – | – | – | Current | Current | Current | Current |
| 3 | Baseline + no compliance with exclusion from work (all sick employees work while ill, PNC;3 = 100%). | 0 / 0 / 0 / 100 | – | None | Current | Current | Current | Current |
| 4 | Baseline + full compliance with exclusion from work while symptomatic and for 24 hours after symptom resolution. | 100 / 0 / 0 / 0 | 24 hours | Full | Current | Current | Current | Current |
| 5 | Baseline + full compliance with exclusion from work while symptomatic and for 48 hours after symptom resolution. | 100 / 0 / 0 / 0 | 48 hours | Full | Current | Current | Current | Current |
| 6 | Baseline + exclusion from work of 48 hours after symptom resolution. | 74 / 9.1 / 3.9 / 13 | 48 hours | Current | Current | Current | Current | Current |
| 7 | Baseline + slight decreased compliance with exclusion from work while symptomatic and for 48 hours after symptom resolution. | 64 / 12.6 / 5.4 / 18 | 48 hours | Decreased | Current | Current | Current | Current |
| 8 | Baseline + significant decreased compliance with exclusion from work while symptomatic and for 48 hours after symptom resolution. | 54 / 16.1 / 6.9 / 23 | 48 hours | Decreased | Current | Current | Current | Current |
| 9 | Baseline + increased compliance with exclusion from work while symptomatic and for 24 hours after symptom resolution. | 84 / 3.7 / 4.3 / 8 | 24 hours | Increased | Current | Current | Current | Current |
| 10 | Baseline + restrooms washed every four hours. | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 11 | Baseline + employees always wearing gloves without necessarily changing gloves. | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Full | Current |
| 12 | Baseline + employees always wash their hands in the restrooms. | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Full | Current | Current | Current |
| 13 | Baseline + touchless faucet and door handles in restrooms. | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 14 | Baseline + FE‐3 replacing FE‐1, FE‐1 is excluded from the food preparation area (no contact with food and FCS, contact with NFCS every 10 minutes) during 24 hours, FE‐1 is not replaced when he does not declare illness at all (category noncompliant 3). | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 15 | Baseline + 48‐hour exclusion after symptom resolution + FE‐3 replacing FE‐1, FE‐1 is excluded from the food preparation area (no contact with food and FCS, contact with NFCS every 10 minutes) during 24 hours, FE‐1 is not replaced when he does not declare illness at all (category noncompliant 3). | 74 / 6.0 / 7.0 / 13 | 48 hours | Current | Current | Current | Current | Current |
| 16 | Baseline + FE‐3 replacing FE‐1, FE‐1 is excluded from the food preparation area (no contact with food and FCS, contact with NFCS every 10 minutes) during 48 hours, FE‐1 is not replaced when he does not declare illness at all (category noncompliant 3). | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 17 | Baseline + full compliance with exclusion from work + FE‐3 replacing FE‐1, FE‐1 is excluded from the food preparation area (no contact with food and FCS, contact with NFCS every 10 minutes) during 24 hours, FE‐1 is not replaced when he does not declare illness at all (category noncompliant 3). | 100 / 0 / 0 / 0 | 24 hours | Current | Current | Current | Current | Current |
| 18 | Baseline + full compliance of handwashing in restrooms + full compliance with handwashing in food preparation area, wearing and changing gloves when engaging in food preparation according to the FDA Food Code. | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Full | Full | Full | Full |
| 19 | Baseline + improved handwashing efficacy (+1 log10). | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 20 | Baseline + improved handwashing efficacy (+2 log10). | 74 / 6.0 / 7.0 / 13 | 24 hours | Current | Current | Current | Current | Current |
| 21 | Baseline + considering all food employees who worked while symptomatic are noncompliant type 3 (i.e., all come to work during the whole symptomatic period). | 80 / 0 / 0 / 20 | 24 hours | Equivalentb | Current | Current | Current | Current |
| 22 | Baseline + considering all food employees who worked while symptomatic are noncompliant type 3 (i.e., come to work during the whole symptomatic period) + exclusion from work of 48 hours after symptom resolution. | 80 / 0 / 0 / 20 | 48 hours | Equivalentb | Current | Current | Current | Current |
a
Current: Based on observational surveys; see Table I for the value of parameters; –: not used.
b
In the baseline and in scenarios 21 and 22, 20% of food employees came to work while symptomatic and 80% came to work after symptom resolution. In the baseline, categories PNC;2 (7%) and PNC;3 (13%) came to work while symptomatic (7+13=20%), and categories PC (74%) and PNC;1 (6%) came back to work after symptom resolution (74 + 6 =80%).