CDC
is only reporting ill people that have been confirmed by PulseNet as being infected
with the outbreak strain of Shiga toxin-producing Escherichia coli O26
(STEC O26). Forty-five people infected with the outbreak strain of STEC O26
have been reported from 6 states. The majority of illnesses have been reported
from Washington and Oregon. The number of ill people reported from each state
is as follows: California (2), Minnesota (2), New York (1), Ohio (1), Oregon
(13), and Washington (26).
Among
people for whom information is available, illnesses started on dates ranging
from October 19, 2015 to November 8, 2015. Ill people range in age from 2 years
to 94, with a median age of 22. Fifty-eight percent of ill people are female.
Sixteen (36%) people reported being hospitalized. There have been no reports of
hemolytic uremic syndrome and no deaths.
CDC
and state and local public health partners are continuing laboratory
surveillance through PulseNet to identify additional ill persons and to
interview them.
Investigation Update: CDC, the U.S. Food and Drug Administration, and public health
officials in several states are investigating an outbreak of Shiga
toxin-producing Escherichia coli O26 (STEC O26) infections.
The
epidemiologic evidence available to investigators at this time suggests that a
meal item or ingredient served at Chipotle Mexican Grill restaurants at several
states is a likely source of this outbreak. The investigation has not identified
what specific food is linked to illness. Chipotle Mexican Grill is assisting
public health officials with understanding the distribution of food items
served at locations where ill people ate and this work is ongoing.
State
and local public health officials are interviewing ill people to obtain
information about foods they might have eaten and other exposures in the week
before their illness started. Forty-three (96%) of 45 people interviewed
reported eating at a Chipotle Mexican Grill restaurant. The investigation is
ongoing to identify common meal items or ingredients causing illness.
Investigators
are also using whole genome sequencing, an advanced laboratory technique, to get more information
about the DNA fingerprint of the STEC O26 bacteria causing illness. To date,
whole genome sequencing has been performed on STEC O26 isolates from 9 ill
people in Washington and 1 ill person in Minnesota. All 10 isolates were highly
related genetically to one another. This provides additional evidence that
illnesses outside the Pacific Northwest are related to the illnesses in Oregon
and Washington.
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