Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Silva, L. Juan

Committee Member

White, H. Charles

Committee Member

Schilling, W. Mark

Committee Member

Watson, H. Vance

Committee Member

Mikel, B. William

Date of Degree

12-9-2006

Document Type

Graduate Thesis - Open Access

Major

Food Science, Nutrition and Health Promotion

Degree Name

Master of Science

College

College of Agriculture and Life Sciences

Department

Department of Food Science, Nutrition and Health Promotion

Abstract

Attachment strength of Listeria spp. and their InlA expression was assessed. Listeria monocytogenes 19111 exhibited the strongest attachment strength with L. monocytogenes 19115, L. grayi, L. innocua, and L. monocytogenes 7644 being the weakest. InlA expression was not detected in silver stained SDS gels but was detected in Western blotting images. Internalin A was only detected in protein extracts of L. monocytogenes 19111 and 7644 with band intensities of 50.1 and 2.5 pixels, respectively. Greater InlA expression was correlated with higher attachment strength in L. monocytogenes 19111. Listeria monocytogenes 19115 did not express InlA but it had a stronger attachment than L. monocytogenes 7644 which demonstrated InlA expression. Intensity of InlA expressed in L. monocytogenes 19111 increased when temperature increased from 10 to 40 oC, and L. monocytogenes 7644 only expressed InlA at 40 oC. It was also determined that InlA was more expressed in nutrient-rich media than in nutrient-poor media.

URI

https://hdl.handle.net/11668/15566

Comments

Internalin A||Listeria||Attachment strength

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