Investigation of a Multistate Outbreak of Human Salmonella I 4,,12:i:- Infections Linked to Alfalfa Sprouts
Persons infected with the outbreak strain of Salmonella I4,,12:i:-, by state
From November 1, 2010, through January 4, 2011, 112 individuals infected with the outbreak strain of Salmonella serotype I 4,,12:i:-, whose illnesses began (onset dates) since November 1, have been reported from 18 states and the District of Columbia. The number of ill persons identified in each state and the District of Columbia with the outbreak strain is as follows: California (1), Colorado (1), Connecticut (1), District of Columbia (1), Georgia (1), Hawaii (1), Iowa (1), Illinois (59), Indiana (10), Kentucky (1), Massachusetts (2), Missouri (22), New York (1), Pennsylvania (3), South Dakota (1), Tennessee (1), Texas (1), Virginia (1), and Wisconsin (3). Among 111 persons for whom information is available, illness onset dates range from November 1 to December 24, 2010. Case-patients range in age from 1 to 75 years-old, with a median age of 28 years-old. Seventy-five patients (or 68%) are female. Among persons with available information, 24% reported being hospitalized. No deaths have been reported. Because the pulsed-field gel electrophoresis (PFGE) pattern associated with this particular Salmonella serotype commonly occurs in the United States, some of the cases identified may not be related to this outbreak.