Outbreak Highlights, August 27, 2012 (FINAL Update Addendum)
Note: The final update for the investigation was published online on December 8, 2011. CDC has published this addendum to provide updated final numbers of outbreak-associated illnesses and deaths.
This multistate outbreak of Listeriamonocytogenes infections (listeriosis) ended in October, 2011.
After the final update on December 8, a fifth outbreak-associated subtype of Listeria was isolated from a sample of cantaloupe collected during the investigation.
The fifth subtype matches that of Listeria isolated from one patient. This patient’s illness had been reported, but had not previously been linked to the outbreak. Therefore, this case has been added to the number of outbreak-associated illnesses. This brings the total number of outbreak-associated illnesses to 147 persons infected with any of the five outbreak-associated subtypes of Listeria. These persons lived in 28 states.
The number of outbreak-associated deaths has increased by three since December 8, 2011. In total, 33 deaths from outbreak-associated cases of listeriosis have been reported to CDC. In addition, one woman pregnant at the time of illness had a miscarriage.
Ten other deaths not attributed to listeriosis occurred among persons who had been infected with an outbreak-associated subtype. State and local public health officials reviewed causes of death listed on death certificates to determine whether to attribute these deaths to listeriosis. Deaths included in this review occurred as recently as February 29, 2012.
Listeria is a rare but important cause of human illness in the United States. More information about listeriosis and recommendations to reduce the risk of getting listeriosis from food are available at CDC's Listeriosis webpage.