Table 1. Surveillance and focus area for two core projects conducted at all Emerging Infections Program sites^a.

Projects	Type of surveillance	Focus
Active Bacterial Core Surveillance	Active, laboratory-based	Invasive disease (isolated from a normally sterile site such as blood or cerebrospinal fluid) caused by group A streptococcus, group B streptococcus, Haemophilus influenzae, Neisseria meningitidis, and Streptococcus pneumoniae
FoodNet/Foodborne Disease Active Surveillance	Active, laboratory-based	Disease (first isolation from a person) caused by Campylobacter, Listeria, Salmonella, Shigella, Yersinia, Vibrio, Shiga toxin–producing Escherichia coli, including O157:H7, Cryptosporidium, and Cyclospora

^aIntended to generate reliable estimates of the incidence of certain infections and provide the foundation for a variety of epidemiologic studies to explore risk factors, disease spectrum, and prevention strategies.