Please see the Timeline for Reporting Cases of Salmonella Infection for more details.
Illnesses that occurred after Mamay not yet be reported due to the time it takes between when a person becomes ill and when the illness is reported. It shows that most illnesses began after October 1, 2008. This chart is called an epidemic curve or epi curve. The outbreak can be visually described with a chart showing the number of persons who became ill each day. The clusters also appeared similar epidemiologically, so the two patterns were grouped together as a single outbreak strain, and the investigations were merged. Neither of these patterns were seen previously in the PulseNet Salmonella Typhimurium database. The PFGE patterns of the second cluster were very similar to the patterns in the first cluster and were first noted by PulseNet on November 24, as a cluster of 27 isolates that had subsequently increased to 41 isolates. On December 2, CDC and state and local partners began an assessment of a second cluster of 41 Salmonella Typhimurium isolates. On November 25, CDC’s OutbreakNet team, working with state and local partners, began an epidemiologic assessment of that cluster, which had increased to 35 isolates. On November 10, 2008, CDC’s PulseNet staff noted a small and highly dispersed multistate cluster of 13 Salmonella Typhimurium isolates with an unusual DNA fingerprint or pulsed-field gel electrophoresis (PFGE) pattern reported from 12 states. Infection may have contributed to nine deaths: Idaho (1), Minnesota (3), North Carolina (1), Ohio (2), and Virginia (2). Among persons with available information, 24% reported being hospitalized. Additionally, one ill person was reported from Canada.Īmong the persons with confirmed, reported dates available, illnesses began between Septemand March 31, 2009. The number of ill persons identified in each state is as follows: Alabama (2), Arizona (14), Arkansas (6), California (81), Colorado (18), Connecticut (11), Florida (1), Georgia (6), Hawaii (6), Idaho (17), Illinois (12), Indiana (11), Iowa (3), Kansas (2), Kentucky (3), Louisiana (1), Maine (5), Maryland (11), Massachusetts (49), Michigan (38), Minnesota (44), Missouri (15), Mississippi (7), Montana (2), Nebraska (1), New Hampshire (14), New Jersey (24), New York (34), Nevada (7), North Carolina (6), North Dakota (17), Ohio (102), Oklahoma (4), Oregon (15), Pennsylvania (19), Rhode Island (5), South Dakota (4), Tennessee (14), Texas (10), Utah (8), Vermont (4), Virginia (24), Washington (25), West Virginia (2), Wisconsin (5), and Wyoming (2). CDC is collaborating with public health officials in many states and the United States Food and Drug Administration (FDA) to investigate a multistate outbreak of human infections due to Salmonella serotype Typhimurium.Īs of 9 PM EDT, Monday, April 20, 2009, 714 persons infected with the outbreak strain of Salmonella Typhimurium have been reported from 46 states.
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