Multistate Outbreak of Human Salmonella Saintpaul Infections Linked to Raw Alfalfa Sprouts
Posted May 8, 2009
This outbreak appears to be over. However, Salmonella is an important cause of human illness in the United States. More information about Salmonella, and steps people can take to reduce their risk of infection, can be found on the CDC Salmonella Web Page.
This outbreak can be visually described with a chart showing the number of persons who became ill each day. This chart is called an epi curve. Please see the Timeline for Reporting of Salmonella Cases for more details on the reporting process.
Infections with the Outbreak Strain of Salmonella Chester, by Week of Illness Onset
By Date of Illness Onset by State (n=234*)
The outbreak can be visually described with a chart showing the number of persons who became ill each day. This chart is called an epidemic curve or epi curve. It shows that illnesses began in early February, peaked in early March and have been tapering off in April. Illnesses that occurred after April 17, 2009 may not yet be reported due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. Please see the Salmonella Outbreak Investigations: Timeline for Reporting Cases for more details
*Some illness onset dates have been estimated from other reported information.
Get email updates
To receive email updates about this page, enter your email address:
- Centers for Disease Control and Prevention
1600 Clifton Rd
Atlanta, GA 30333
TTY: (888) 232-6348
- Contact CDC–INFO