1921
Volume 93, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Abstract

The resilience of , the causative agent of melioidosis, was evaluated in control soil microcosms and in soil microcosms containing NaCl or FeSO at 30°C. Iron (Fe(II)) promoted the growth of during the 30-day observation, contrary to the presence of 1.5% and 3% NaCl. Scanning electron micrographs of in soil revealed their morphological alteration from rod to coccoid and the formation of microcolonies. The smallest cells were found in soil with 100 μM FeSO compared with in the control soil or soil with 0.6% NaCl ( < 0.05). The colony count on Ashdown's agar and bacterial viability assay using the LIVE/DEAD Light stain combined with flow cytometry showed that remained culturable and viable in the control soil microcosms for at least 120 days. In contrast, soil with 1.5% NaCl affected their culturability at day 90 and their viability at day 120. Our results suggested that a low salinity and iron may influence the survival of and its ability to change from a rod-like to coccoid form. The morphological changes of cells may be advantageous for their persistence in the environment and may increase the risk of their transmission to humans.

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2015-11-04
2017-09-19
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Supplementary Data

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  • Received : 04 Mar 2015
  • Accepted : 22 Jul 2015

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