Theses and Dissertations


Title: ADHESIVENESS OF FLAVOBACTERIUM COLUMNARE: COMPARISON OF DIFFERENT METHODS AND ISOLATES

Name: Zhang, Yinfeng

Degree: MS

Chair: Grizzle, J.

Resides: SFAA

University: Auburn University

Location: Auburn

Date: 2004

Pages: 85

Keywords: fish disease, bacteria, flavobacterium, virulence, adhesiveness

Abstract:

Previous studies have attempted to correlate adhesiveness and virulence of

Flavobacterium columnare; however, variation in adhesion among isolates has not been

well documented. Objectives of my study were to evaluate

and compare different assays for adhesiveness of  F.

columnare, to evaluate the adhesiveness of different

isolates of F. columnare, and to correlate adhesiveness

with virulence. Four assays were used (plastic plate,

cultured cells, isolated gills, and whole zebrafish ( Danio

rerio); the isolates used showed different adhesion ability

in all assays. For the gill assay, gills from fish with

Aeromonas infection, proliferative gill disease, or both

were used in addition to apparently normal gills.

Flavobacterium columnare had greater adhesion to the

diseased gills than to the control gills. For all assays,

adhesion was not correlated with the level of virulence

reported in an earlier study. Adhesion variation was

demonstrated among isolates of F. columnare, and other

diseases influenced adhesion of F. columnare.

 

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