Table 3 Additional characteristics of included studies
Study number | Mean incubation period | No. affected (attack rate) | No hospitalised (deaths) | Age Distribution | Source | Setting of exposure | Food vehicle | Ingested dose | Vaccine history | Case definitions as described by the studies |
|---|---|---|---|---|---|---|---|---|---|---|
Study 1 | 16.5 | 12 (Low) | 0 (0) | children | Surface water | Recreational park | NR | Not reported | Not reported | All clinical symptoms with or without microbiological confirmation |
Study 2 | 20.9 | 31 (31.63) | 16 (0) | Mixed | Food handler | catered meal | Sandwiches | Not reported | 17 cases reported previous vaccination at anytime | All clinical symptoms |
Study 3 | 14 | 24 (40) | 7 (0) | Mixed | Food handler | Picnic | Potato Salad | Not reported | None | All clinical symptoms with or without microbiological confirmation |
Study 4 | 17.4 | 7 (NR) | 7 (0) | Mixed | Food handler | Restaurant | NR | Not reported | Not reported | All clinical symptoms |
Study 5 | 21.4 | 24 (25.53) | 24 (0) | Adults | Food handler | Outdoor activity | Cucumber salad | Not reported | All cases | Specific to fever with or without microbiological confirmation |
Study 6 | 11.4 | 235 (34.97) | NR | Adults | Experimental | Experimental | Milk | 105 | None | Specific to fever |
Study 7 | 20.6 | 69 (65.09) | 69 (0) | Mixed | Food handler | catered meal | NR | Not reported | Not reported | All clinical symptoms with or without microbiological confirmation |
Study 8 | 17.7 | 26 (7.42) | 26 (0) | NR | Unknown | catered meal | Pork meat | Not reported | Not reported | Specific to fever with or without microbiological confirmation |
Study 9 | 14.7 | 35 (14) | 35 (6) | Mixed | Food handler | catered meal | Vegetable | Not reported | Not reported | All clinical symptoms with or without microbiological confirmation |
Study 10 | 10.5 | 84 (56) | 77 (3) | Mixed | Food handler | catered meal | Spanish spaghetti | Not reported | Not reported | All clinical symptoms with or without microbiological confirmation |
Study 11 | 9.7 & 7.6 | 24 (60) | 0 (0) | Adults | Experimental | Experimental | Sodium bicarbonate | 103 & 104 | None | Specific to fever with or without microbiological confirmation |
Study 12 | 9.1 | 41 (73.21) | NR | Mixed | Unknown | community | Corned beef | Not reported | Not reported | All clinical symptoms |
Study 13 | 7 | 23 (79.31) | 23 (3) | NR | Food handler | Picnic | Ice cream | Not reported | Not reported | Specific to fever and excluding diarrhea and vomiting |