Salmonella

Multistate Outbreak of Human Salmonella Newport Infections Linked to Raw Alfalfa Sprouts (Final Update)

Posted June 29, 2010

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.

Epi Curve

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

n=44 for whom information was reported as of 06/24/10 at 11:00 pm EDT*

An epi curve (graph) showing infections with an outbreak strain of Salmonella by date of illness.

*Some illness onset dates have been estimated from other reported information.

Illnesses that occurred after June 11, 2010, might 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. For more details, please see the Salmonella Outbreak Investigations: Timeline for Reporting Cases.

« Read the full Outbreak Investigation

Previous Epi Curves

Epi Curve: June 3, 2010

n=35 for whom information was reported as of 06/02/10 at 11:00 pm EDT*

An epi curve (graph) showing infections with an outbreak strain of Salmonella by date of illness as of June 2, 2010.

*Date of isolation by week.

Illnesses that occurred after May 16, 2010, might 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. For more details, please see the Salmonella Outbreak Investigations: Timeline for Reporting Cases.

Epi Curve: May 27, 2010

n=28 for whom information was reported as of 05/26/10 at 11:00 am EDT*

An epi curve (graph) showing infections with an outbreak strain of Salmonella by date of illness as of May 26, 2010.

*Some illness onset dates have been estimated from other reported information.

Illnesses that occurred after May 5, 2010, might 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. For more details, please see the Salmonella Outbreak Investigations: Timeline for Reporting Cases.