Occurrence of <i>Giardia</i> in the effluents of a waste water treatment plant in Dhaka

  • Hamida Khanum Department of Zoology, University of Dhaka, Dhaka
  • Sharmili Shanjida Khanam Department of Zoology, University of Dhaka, Dhaka
  • Masuma Sultana Department of Zoology, University of Dhaka, Dhaka
  • Md. Hafiz Uddin Department of Zoology, University of Dhaka, Dhaka
  • Ripon Chandra Dhar Department of Zoology, University of Dhaka, Dhaka
  • Md. Sirazul Islam Environmental Microbiology Laboratory, Laboratory Sciences Division, International Centre for Diarrhoeal Disease Research
Keywords: Giardiasis, Formol-Ether Concentration Method, IMS, Abundance, Correlation, Turbidity, TDS

Abstract

The present study was designed for the qualitative and quantitative detection of Giardia in the Pagla Sewage Treatment Plant (PSTP) in Dhaka. The physico-chemical parameters of the sewage water were also recorded. Total 72 raw and treated samples were collected from PSTP throughout the year 2008 and these were processed with the Formol-Ether Concentration method and IMS followed by microscopy to identify Giardia in the sewage water. The protozoan parasite Giardia was abundant (2.23±1.44 × 105 cyst/l) in the sewage water dominating the sampling sites-Grit chamber (44%), Measuring chamber (34%) and Outlet lagoon (38%). A low abundance of Giardia in the PSTP starting from the first point to the last one indicates the waste water treatment efficiency for removal of the pathogen. A significant correlation was found for log (number of Giardia +1) with turbidity (r= 0.729) and TDS (r= 0.536) at 0.01level.

DOI: http://dx.doi.org/10.3329/bjz.v39i2.10578

Bangladesh J. Zool. 39(2): 147-156, 2011

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Abstract
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Published
2012-05-13
How to Cite
Khanum, H., Khanam, S., Sultana, M., Uddin, M., Dhar, R., & Islam, M. (2012). Occurrence of <i>Giardia</i&gt; in the effluents of a waste water treatment plant in Dhaka. Bangladesh Journal of Zoology, 39(2), 147-156. https://doi.org/10.3329/bjz.v39i2.10578
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Articles