FSIS_14-07_Interim4_Redacted_PlusCover.pdf#_ga=1.106999616.330874689

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From: Defibaugh-Chavez, Stephanie - FSIS
Sent: Monday, October 28, 2013 6:51 PM
To: Green, Alice - FSIS; Dessai, Uday - FSIS
Cc: Robertson, Kis - FSIS; Kissler, Bonnie - FSIS; Douris, Aphrodite - FSIS
Subject: RE: Heidelberg Pct Hospitalized by PFGE
I think it’s interesting that although 258 and 45 are highly similar in PFGE pattern, they appear to have vastly different
hospitalization rates (almost double for 45). To me, this particular difference in hospitalization rates indicates the
likelihood of some sort of plasmid that is making some of these strains more virulent than others.
Stephanie Defibaugh-Chávez, Ph.D.
Microbiologist
Science Staff, Office of Public Health Science
Food Safety and Inspection Service
United States Department of Agriculture
202-690-6042 (office)
202-641-5540 (Blackberry)
202-690-6364 (fax)
email: stephanie.defibaugh@fsis.usda.gov
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_____________________________________________
From: Green, Alice - FSIS
Sent: Monday, October 28, 2013 6:08 PM
To: Dessai, Uday - FSIS
Cc: Defibaugh-Chavez, Stephanie - FSIS; Robertson, Kis - FSIS; Kissler, Bonnie - FSIS; Douris, Aphrodite - FSIS
Subject: RE: Heidelberg Pct Hospitalized by PFGE
Hi Uday—
Here is today’s update to the requested information.
Based on Aphrodite’s work last summer, patterns 258 and 45 are the most closely related in the cluster at 99% similar
with one band differing. Patterns 122 and 672 are about 97% similar with one band difference. Pattern 22 is 90% or
less similar to all other patterns.
file:///Z|/All%202014%20FOIA's/01%20-%2050/14-07/from%20OPHS/14-07/AG/2013%20Foster%20Farms.txt[12/6/2013 3:31:24 PM]