The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms

The freshwater bacterium Flavobacterium columnare is known to exhibit different morphologies when cultured in different media with bacteriophage. This could influence the type of phage-resistance mechanisms the bacteria use, such as CRISPR-Cas system or alterations which reduce bacteriophage adsorpt...

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Main Author: Smith, Katie
Other Authors: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Bio- ja ympäristötieteiden laitos, Department of Biological and Environmental Science, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2019
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/65152
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author Smith, Katie
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_facet Smith, Katie Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä Smith, Katie Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Bio- ja ympäristötieteiden laitos Department of Biological and Environmental Science Jyväskylän yliopisto University of Jyväskylä
author_sort Smith, Katie
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description The freshwater bacterium Flavobacterium columnare is known to exhibit different morphologies when cultured in different media with bacteriophage. This could influence the type of phage-resistance mechanisms the bacteria use, such as CRISPR-Cas system or alterations which reduce bacteriophage adsorption. In this study the different morphologies which arise in different media when treated with bacteriophage was investigated to identify their favoured phage-resistance mechanism. The bacteria were screened for acquisition of new CRISPR spaces and tested for changes in phage adsorption. Results show that the growth medium itself influences the bacterial colony morphology, likely due to the difference in nutrients available. When exposed to bacteriophage, a small proportion of bacteria in HTC medium acquired new CRISPR spacers, however, the preferred phage-resistance mechanism appears to be something other than CRISPR-Cas overall, in SHIEH and HTC. Improved understanding of bacterial resistance mechanisms is useful towards the development of bacteriophage therapies.
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spellingShingle Smith, Katie The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms Flavobacterium columnare colony morphology CRISPR-Cas Phage resistance Akvaattiset tieteet Aquatic sciences 4012 bakteerit bakteriofagit bacteria bacteriophages
title The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
title_full The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
title_fullStr The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
title_full_unstemmed The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
title_short The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
title_sort effects of growth medium on flavobacterium columnare colony morphology and its phage resistance mechanisms
title_txtP The effects of growth medium on Flavobacterium columnare colony morphology and its phage resistance mechanisms
topic Flavobacterium columnare colony morphology CRISPR-Cas Phage resistance Akvaattiset tieteet Aquatic sciences 4012 bakteerit bakteriofagit bacteria bacteriophages
topic_facet 4012 Akvaattiset tieteet Aquatic sciences CRISPR-Cas Flavobacterium columnare Phage resistance bacteria bacteriophages bakteerit bakteriofagit colony morphology
url https://jyx.jyu.fi/handle/123456789/65152 http://www.urn.fi/URN:NBN:fi:jyu-201907303713
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