Production and application of antibodies produced against the flagella and hemolysin of Vibrio parahaemolyticus

Vibrio parahaemolyticus is a marine bacterium which is the leading cause of bacterial gastroenteritis due to consumption of raw or undercooked bivalve molluscan shellfish in United States and is considered an important seafood-borne pathogen throughout the world. The conventional methods for enumerating this bacteria from seafood is laborious and time consuming, hence the objective of our study was to develop antibody based method which would be sensitive, user-friendly and less time consuming to detect and enumerate Vibrio parahaemolyticus from oysters. In order to condense time and material two rapid and specific antibody based test methods were developed. In the first method, monoclonal antibodies were produced against the polar flagella of Vibrio parahaemolyticus. The monoclonal antibody was employed in Immunomagnetic separation (IMS) protocol and was then coupled with Real-time PCR (q-PCR). IMS coupled to q-PCR was able to detect bacterial numbers in less than 3 hrs with a sensitivity of 1,000 CFU/g of oyster homogenate. In the second method anti-hemolysin serum was produced and employed in Direct colony immunoblot (DCI) protocol to detect pathogenic Vibrio parahaemolyticus. DCI when compared with the currently used conventional method, DNA hybridization (DNAH) showed good correlation and was a faster and simpler method requiring less equipment and stringent laboratory conditions than DNAH. From our results we have found that IMS+q-PCR or DCI could be an useful addition to the methods available for enumerating pathogenic V. parahaemolyticus in seafood.

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Life Sciences

Grantor

School of Nutrition and Food Sciences

Year dc:date.available

2009

Author dc:creator

• Datta, Shreya

• Vibrio parahaemolyticus
• antibodies

Statement dc:rights

• unrestricted
• Release the entire work immediately for access worldwide.

Identifier

etd-04142009-225600
https://repository.lsu.edu/gradschool_dissertations/29

OAI identifier oai:identifier

oai:repository.lsu.edu:gradschool_dissertations-1028