LIST OF ORIGINAL PUBLICATIONS

The present thesis is based on the following original papers referred to in the text by the Roman numerals I to V:

I. Hyytiä, E., Hielm, S. and Korkeala, H. (1998) Prevalence of Clostridium botulinum type E in Finnish fish and fishery products. Epidemiol. Infect. 120, 245-250.

II. Hyytiä, E., Björkroth, J., Hielm, S. and Korkeala, H. (1999) Characterisation of Clostridium botulinum groups I and II by randomly amplified polymorphic DNA analysis and repetitive element sequence-based PCR. Int. J. Food Microbiol. In press.

III. Hyytiä, E., Hielm, S., Björkroth, J. and Korkeala, H. (1999) Biodiversity of Clostridium botulinum type E strains isolated from fish and fishery products. Appl. Environ. Microbiol. 65, 2057-2064.

IV. Hyytiä, E., Hielm, S., Mokkila, M., Kinnunen, A. and Korkeala, H. (1999) Predicted and observed growth and toxigenesis by Clostridium botulinum type E in vacuum-packaged fishery product challenge tests. Int. J. Food Microbiol. 47, 161-169.

V. Hyytiä, E., Eerola, S., Hielm, S. and Korkeala, H. (1997) Sodium nitrite and potassium nitrate in control of nonproteolytic Clostridium botulinum outgrowth and toxigenesis in vacuum-packed cold-smoked rainbow trout. Int. J. Food Microbiol. 37, 63-72.