Correlation between Legionella Water Contamination and Microelements in Water Lines of Selected Hospitals in Tehran
Author(s):
Abstract:
Background and
Purpose
Water microelements can influence the growth and colonization of Legionella and infections associated with these bacteria. This research investigated Legionella contamination of water regarding microelements, alkalinity and hardness in selected hospitals of Tehran.Materials And Methods
Hundred-fifty samples with 4 L volume were collected from cold and warm water system in three selected hospitals in Tehran. After determining the residual chlorine, pH and temperature, the samples were transferred to laboratory for filtration. Legionella culture was performed in supplemented BCYEa (approved as a gold standard technique for environmental samples). Legionella colonies were identified using biochemical and morphological tests. Microelements (Fe, Mn, Zn, Cu, Alk, and hardness) were determined by photometric method. Data was analyzed applying Kolmogorov-Smirnov, Mann-withny, Spearmans rank correlations, univariate and multiple logistic regression tests in SPSS V.15.Results
Significant differences were seen in mean concentrations of all the microelements in positive and negative test of Legionella (P0.05). Spearman correlation implied a significant positive correlation between Fe, Mn, Zn, Alk, and hardness concentrations and Legionella density (PConclusion
Chemical quality of water influences its rate of Legionella contamination. Due to high densities of contamination, routine examination for Legionella detection and specific internal disinfection system in hospitals are advised to eradicate these bacteria.Keywords:
Language:
Persian
Published:
Journal of Mazandaran University of Medical Sciences, Volume:25 Issue: 133, 2016
Pages:
245 to 254
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