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Chemotaxis between Vibrio cholerae O1 and a blue-green alga, Anabaena sp.

Published online by Cambridge University Press:  05 October 2005

M. S. ISLAM ,
M. M. GOLDAR ,
M. G. MORSHED ,
H. B. M. BAKHT ,
M. S. ISLAM  and
D. A. SACK
M. S. ISLAM
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
M. M. GOLDAR
Affiliation:
Department of Botany, Jahangirnagar University, Dhaka 1342, Bangladesh
M. G. MORSHED
Affiliation:
Department of Botany, Jahangirnagar University, Dhaka 1342, Bangladesh
H. B. M. BAKHT
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
M. S. ISLAM
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
D. A. SACK
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
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Abstract

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The chemotactic response of Vibrio cholerae O1 towards the mucilaginous sheath of Anabaena sp. was investigated by capillary tube method using a virulent strain of V. cholerae O1, El Tor, Ogawa (3083-T) and its isogenic mutant (HAP-1-T) that lacks the hap gene, which codes for mucinase (HA/protease). Homogenates of Anabaena sp. and purified mucin were used in this study as chemoattractants. Results showed 5·7% bacterial accumulation of wild-type V. cholerae O1 towards 4% homogenates of Anabaena sp. whereas, its mutant (hap−) showed 2·9% accumulation after 90 min. The higher percentage of attraction of wild-type V. cholerae O1 than the mutant (hap−) towards mucin and the homogenates of Anabaena sp. might be due to the activity of mucinase. These results indicate the role of mucinase in the chemotactic motility of V. cholerae O1 towards Anabaena sp.

Type
Research Article
Information
Epidemiology & Infection , Volume 134 , Issue 3 , June 2006 , pp. 645 - 648
Copyright
2005 Cambridge University Press