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Survival of Aeromonas hydrophila, Aeromonas caviae and Aeromonas sobria in soil



Survival of Aeromonas hydrophila, Aeromonas caviae and Aeromonas sobria in soil



Journal of Applied Bacteriology 81(4): 439-444



The survival of mesophilic Aeromonas spp. in soil in the presence or absence of indigenous microflora was evaluated in a laboratory study. Two cytotoxic (Aer. hydrophila and Aer. caviae) and one invasive (Aer. sobria) clinical isolate strains were selected for this study. After contamination of sterile or unsterilized soil with the three strains of Aeromonas, the number of living cells was determined over at least 5 months. For all strains the survival curves were characterized by an initial re-growth followed by a slow inactivation of bacteria, with significant differences due to the presence of indigenous microflora. The times necessary to achieve a 95% reduction of the initial population were gt 140, 113 and 62 d in sterilized soil respectively for Aer. caviae, Aer. hydrophila and Aer. sobria, while the corresponding times in unsterilized soil were 42, 38 and 11 d. All strains preserved the virulence factors for the entire period of the study. These results suggest that the soil may be an important reservoir for Aeromonas spp. and, thus, may play an important role in the epidemiology of Aeromonas-associated human infections.

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Accession: 002973069

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DOI: 10.1111/j.1365-2672.1996.tb03531.x


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