To access this work you must either be on the Smith College campus OR have valid Smith login credentials.

On Campus users: To access this work if you are on campus please Select the Download button.

Off Campus users: To access this work from off campus, please select the Off-Campus button and enter your Smith username and password when prompted.

Non-Smith users: You may request this item through Interlibrary Loan at your own library.

Publication Date


Document Type

Honors Project


Biological Sciences


Escherichia coli, Bacteria-Motility, Temperature-Physiological effect, Motility, Biofilm, Adhesion, E. coli, Fimbria, Pili, Flagella, UPEC, EPEC, K-12


In this project, I sought to understand the effect of temperature change on visibile motility of various strains of Escherichia coli, as well as the comparativeeffect on the expression of various genes related to motility and biofilm formation. The temperature change I examined involves the transition from 37° to 23°, modeling the thermal transition from the internal environment of a human host to the external environment. Visibile motility means morphological motility, and was assessed using swarming motility assays on growth media with reduced agar concentrations. To determine gene expression data, I used quantitative reverse-transcription polymerase chain reaction with genes related to motility, adhesion, and biofilm formation. The overall goal of this project was to model a temperature transition imitating the transfer from a human host to room temperature from 37°-23° for multiple strains of E. coli to determine the effect of temperature on physical movement as well as gene expression.




56 p. : col. ill. Honors project-Smith College, Northampton, Mass., 2012. Includes bibliographical references (53-56)