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    STUDIA BIOLOGIA - Issue no. 2 / 2003  
         
  Article:   INVESTIGAREA CARACTERELOR FENOTIPICE ASOCIATE CU POTENŢIALUL ENTEROTOXIGEN LA TULPINI DE AEROMONAS IZOLATE DIN SURSE INDIVIDUALE DE APĂ POTABILĂ NETRATATĂ.

Authors:  BRÂNDUŞA BOCOŞ, DANIELA MOGA, ŞTEFAN ŢIGAN. 		 
       
         
  Abstract:  Investigation of Some Phenotypic Characteristics, Associated with the Enterotoxigenic Potential in Strains of A e r o m o n a s Isolated from Individual Untrated Drinking Water Supplies. In this study we investigated the presence of Aeromonas species in 27 individual untrated drinking water supplies, in which the water quality was found to be poor. Identification of 104 Aeromonas strains at species level showed that 85 strains (81.73%) were A. hydrophila HG1 and 6 strains (5.77%) were A. caviae HG5a. Other 13 Aeromonas strains (12.5%) could not be included in any of the 14 hybridisation groups currently recognised by their phenotype only. All the 104 isolates of Aeromonas species were tested for their enterotoxigenic potential. Our results showed that 48.1% of the Aeromonas strains investigated exhibited enterotoxigenicity - associated phenotype, due to their positive responses for the biochemical characteristics known to be strongly associated with enterotoxigenicity of aeromonads (β-haemolysis, acetoin production, lysine decarboxylation and sorbitol fermentation).  
         
     
         
         
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