Deepti Tyagi, M.S. Microbiology ’14, found that E. coli O157:H7 and O26:H11 survival was significantly affected by longer daylight hours, higher growth temperatures, and higher humidity levels. Using whole genome transcriptome analysis, she monitored changes in gene expression of E. coli on lettuce plants, and saw that E. coli increases expression of genes involved in the osmotic and oxidative stress responses. Association of E. coli with the lettuce plants increased the tolerance of the pathogen to a chlorine wash. This research was done in collaboration with Dr. Martin Wiedmann and Sherry Roof at Cornell University, and was funded in part by the Center for Produce Safety. Read more here.
New paper from Bergholz Lab
How do seasonal conditions impact survival of pathogenic E. coli on lettuce? The answer is in a new paper from Teresa Bergholz's group.