Epi Curves

Multistate Outbreak of Human Salmonella Cotham and Salmonella Kisarawe Infections Linked to Contact with Pet Bearded Dragons (Final Update)

Posted August 20, 2014 11:15 AM ET

This investigation is over. However, reptiles continue to be an cause of human Salmonella infections in the United States. More information about Salmonella from reptiles and the steps people can take to reduce their risk of infection is available.

Final 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.

Persons infected with the outbreak strains of Salmonella Cotham or Salmonella Kisarawe, by week of illness onset*

*n=166 for whom information was reported as of July 21, 2014. Some illness onset dates have been estimated from other reported information. The Five Year Baseline Mean above represents the number of Salmonella Cotham cases expected to occur monthly, based on the previous five years of reports to the PulseNet database.

Previous Epi Curves

Persons infected with the outbreak strains of Salmonella Cotham or Salmonella Kisarawe, by date of illness onset*

*n=150 for whom information was reported as of June 6, 2014. Some illness onset dates have been estimated from other reported information. The Five Year Baseline Mean above represents the number of Salmonella Cotham cases expected to occur monthly, based on the previous five years of reports to the PulseNet database.

Illnesses that occurred after May 6, 2014 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 4 weeks.

Persons infected with the outbreak strain of Salmonella Cotham, by date of illness onset*

*n=132 for whom information was reported as of April 21, 2014. Some illness onset dates have been estimated from other reported information. The Five Year Baseline Mean above represents the number of Salmonella Cotham cases expected to occur monthly, based on the previous five years of reports to the PulseNet database.

Illnesses that began after March 22, 2014, might not be reported yet 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 4 weeks.