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Production of the lethal acetylcholinesterase toxin by different Aeromonas hydrophila strains






Journal of Fish Diseases 16(1): 73-78

Production of the lethal acetylcholinesterase toxin by different Aeromonas hydrophila strains

Seven fish pathogenic isolates of Aeromonas hydrophila, one A. sobria and one A. caviae were investigated for productionof the fish lethal acetylcholinesterase toxin (AcChE-toxin). Western blotting was used for screening the ECP of these strains with a rabbit antiserum prepared against the purified toxin of strain B-32 and all the isolates (except A. sobria) gave positive results with different patterns of bands. The AcChE-toxin appears to be secreted as a protein of high molecular weight which is stable at -20 degree C, and in 90% of the strains tested, it appears to be split into lower molecular weight fragments by the action of other components presentin the ECP. The smallest, stable and highly active fragment has a MW of 15KDa.

Accession: 002468142

DOI: 10.1111/j.1365-2761.1993.tb00849.x

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