Table 1. Data sources used to estimate the total number of illnesses for selected infectious diseases, United States*.
| Active surveillance data (name of surveillance system) | Passive surveillance data | Administrative data |
|---|---|---|
| Campylobacteriosis (FoodNet) | Giardiasis (NNDSS) | NTM infection (HCUP NEDS/NIS) |
| Cryptosporidiosis (FoodNet) | Legionnaires’ disease (NNDSS) | Otitis externa (NAMCS, HCUP NEDS/NIS) |
| Norovirus (20,21) | Vibrio spp. infection (COVIS) | Pseudomonas pneumonia (HCUP NEDS/NIS) |
| Salmonellosis, nontyphoidal (FoodNet) | Vibrio alginolyticus infection (COVIS) | Pseudomonas septicemia (HCUP NEDS/NIS) |
| STEC infection, O157 (FoodNet) | Vibrio parahaemolyticus infection (COVIS) | |
| STEC infection, non-O157 (FoodNet) | Vibrio vulnificus infection (COVIS) | |
| Shigellosis (FoodNet) | Other Vibrio infection (COVIS) |
*COVIS, Cholera and Other Vibrio Illness Surveillance; FoodNet, Foodborne Diseases Active Surveillance Network; HCUP NEDS/NIS, Healthcare Cost and Utilization Project’s National Emergency Department Sample and National Inpatient Sample; NAMCS, National Ambulatory Medical Care Survey; NNDSS, National Notifiable Diseases Surveillance System; NTM, nontuberculous mycobacterial; STEC, Shiga toxin–producing Escherichia coli.