Salmonella

Investigation of a Multistate Outbreak of Human Salmonella I 4,[5],12:i:- Infections Linked to Alfalfa Sprouts

Persons infected with the outbreak strain of Salmonella I4,[5],12:i:-, by state

Infected with the outbreak strain of Salmonella I4,[5],12:i:-, by state

From November 1, 2010, through February 9, 2011, 140 individuals infected with the outbreak strain of Salmonella serotype I 4,[5],12:i:-, whose illnesses began (onset dates) since November 1, were reported from 26 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: Arkansas (1), California (1), Colorado (1), Connecticut (1), District of Columbia (1), Georgia (1), Hawaii (1), Iowa (1), Illinois (70), Indiana (13), Kentucky (1), Louisiana (1), Massachusetts (2), Maryland (1), Missouri (23), Nebraska (1), Nevada (1), New Jersey (1), New York (2), North Carolina (1), Oregon (1), Pennsylvania (4), South Carolina (1), South Dakota (1), Tennessee (2), Virginia (2), and Wisconsin (4). Among 138 persons for whom information is available, reported illness onset dates range from November 1 to January 18, 2011. Case-patients range in age from 1 to 85 years-old, with a median age of 28 years-old. Eighty-seven patients (or 63%) are female. Among persons with available information, 24% reported being hospitalized. No deaths were 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.