A total of 249 strains of mesophilic
Aeromonas including 179
A. hydrophila and 70
A. caviae were tested for production of cholera-like enterotoxin by reversed passive latex agglutination (RPLA) assay. A cholera-like enterotoxin neutralized with cholera antitoxin was demonstrated in the culture filtrates from eight (4.5%) of the 179
A. hydrophila strains, while none of
A. caviae strains revealed the enterotoxin production in the test. Production of the cholera-like enterotoxin in the eight strains of
A. hydrophila was also confirmed by enzymelinked immunosorbent assay (ELISA) .
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