Frank W. Moler, M.D article ., Faye S. Silverstein, M.D., Richard Holubkov, Ph.D., Beth S. Slomine, Ph.D., James R. Christensen, M.D., Vinay M. Nadkarni, M.D., Kathleen L. Meert, M.D., Amy E. Clark, M.S., Brittan Browning, M.S., R.D., C.C.R.C., Victoria L. Pemberton, R.N.C., M.S., Kent Web page, M.Stat., Seetha Shankaran, M.D., Jamie S. Hutchison, M.D., Christopher J.L. Newth, M.D., Kimberly S. Bennett, M.D., M.P.H., John T. Berger, M.D., Alexis Topjian, M.D., Jose A. Pineda, M.D., Joshua D. Koch, M.D., Charles L. Schleien, M.D., M.B.A., Heidi J.
, and the CDC conducted traceback investigations of the distribution pathway for implicated food items associated with several ill persons and restaurant clusters. Environmental assessments had been conducted as part of the restaurant-cluster investigations to find out whether meals handlers were ill before the onset of illness in patrons and to identify procedures in food preparation, handling, and storage space. The FDA collected meals samples and conducted environmental investigations along the distribution chain, including at distribution centers, packing services, and farms, to determine possible sources of contamination. Statistical Analysis Data were entered right into a data source, and statistical analyses were conducted by using SAS software, version 9.1 .