Tolerance of Pseudomonas Aeruginosa to Selected Concentrations of Metals and Sodium Chloride

  • Akpor, Morah, Adejobi, Oloninefa
  • Published 2015


The presences of heavy metals at concentrations that exceed their permissible limits are toxic to humans, animals and aquatic life. This study was aimed at determining the tolerance of Pseudomonas aeruginosa to concentrations of selected metals (Zn, Cu, Cr, Fe and Ni) and sodium chloride. To achieve this aim, the effects of metal concentration, pH, temperature and initial inoculum size on viable counts of the isolate in presence of the respective metals were investigated. The results revealed that in presence of Zn, Cu, Cr, Fe and Ni, no growth of the isolate was observed at concentrations above 100 mg/L while in the presence of the sodium chloride, remarkable growth was observed at the different concentrations investigated. At the different incubation temperatures studies, the highest counts of 5.8×10 cfu/mL and 5.5×10 cfu/mL were observed in the presence of sodium chloride and iron, respectively at 35C. In the case of pH, highest counts of 1.7×10 cfu/mL, 1.6×10 cfu/mL, 1.5×10 cfu/mL, 1.3×10 cfu/mL and1.2×10 cfu/mL were observed at pH 6 in the presence of Cu, sodium choride, Zn, Cr, and Fe respectively. In the presence of Fe, highest microbial count of 1.2×10 cfu/mL was observed at pH 8. The study was able to reveal the effect of the test metals on growth of the test bacterial isolate.

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Cite this paper

@inproceedings{Akpor2015ToleranceOP, title={Tolerance of Pseudomonas Aeruginosa to Selected Concentrations of Metals and Sodium Chloride}, author={Akpor and Morah and Adejobi and Oloninefa}, year={2015} }