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Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment.
J Appl Microbiol. 2009 Mar; 106(3):847-52.JA

Abstract

AIMS

To determine the impact of natural sunlight in disinfecting water contaminated with cysts of Giardia duodenalis and Entamoeba histolytica/dispar using plastic containers.

METHODS AND RESULTS

Known quantities of Giardia duodenalis and Entamoeba histolytica/dispar cysts in sterile water were exposed to the sun. Containers were made of polyethylene terephthalate, eight painted black on one side, one not painted and another cut open at the top and the last was a high density polypropylene container. Viability testing was performed using vital and fluorescent dyes. The same assays were conducted under cloudy conditions. Thermal control tests were also performed using heat without ultra violet light from the sun. Results show that 99.9% of parasites was inactivated when water temperatures reached 56 degrees C after sunlight exposure.

CONCLUSION

Both solar radiation and heat produced by the sun have a synergistic effect in killing cysts of Giardia duodenalis and Entamoeba histolytica/dispar when temperatures rise above 50 degrees C, with complete death at 56 degrees C, using painted 2-l PET containers.

SIGNIFICANCE AND IMPACT OF THE STUDY

Solar disinfection system using PET containers painted black on one side can be used to disinfect water against Giardia duodenalis and Entamoeba histolytica/dispar using natural sunlight.

Authors+Show Affiliations

Department of Medical Microbiology, College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19191972

Citation

Mtapuri-Zinyowera, S, et al. "Impact of Solar Radiation in Disinfecting Drinking Water Contaminated With Giardia Duodenalis and Entamoeba Histolytica/dispar at a Point-of-use Water Treatment." Journal of Applied Microbiology, vol. 106, no. 3, 2009, pp. 847-52.
Mtapuri-Zinyowera S, Midzi N, Muchaneta-Kubara CE, et al. Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment. J Appl Microbiol. 2009;106(3):847-52.
Mtapuri-Zinyowera, S., Midzi, N., Muchaneta-Kubara, C. E., Simbini, T., & Mduluza, T. (2009). Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment. Journal of Applied Microbiology, 106(3), 847-52. https://doi.org/10.1111/j.1365-2672.2008.04054.x
Mtapuri-Zinyowera S, et al. Impact of Solar Radiation in Disinfecting Drinking Water Contaminated With Giardia Duodenalis and Entamoeba Histolytica/dispar at a Point-of-use Water Treatment. J Appl Microbiol. 2009;106(3):847-52. PubMed PMID: 19191972.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of solar radiation in disinfecting drinking water contaminated with Giardia duodenalis and Entamoeba histolytica/dispar at a point-of-use water treatment. AU - Mtapuri-Zinyowera,S, AU - Midzi,N, AU - Muchaneta-Kubara,C E, AU - Simbini,T, AU - Mduluza,T, Y1 - 2009/01/15/ PY - 2009/2/5/entrez PY - 2009/2/5/pubmed PY - 2010/4/17/medline SP - 847 EP - 52 JF - Journal of applied microbiology JO - J. Appl. Microbiol. VL - 106 IS - 3 N2 - AIMS: To determine the impact of natural sunlight in disinfecting water contaminated with cysts of Giardia duodenalis and Entamoeba histolytica/dispar using plastic containers. METHODS AND RESULTS: Known quantities of Giardia duodenalis and Entamoeba histolytica/dispar cysts in sterile water were exposed to the sun. Containers were made of polyethylene terephthalate, eight painted black on one side, one not painted and another cut open at the top and the last was a high density polypropylene container. Viability testing was performed using vital and fluorescent dyes. The same assays were conducted under cloudy conditions. Thermal control tests were also performed using heat without ultra violet light from the sun. Results show that 99.9% of parasites was inactivated when water temperatures reached 56 degrees C after sunlight exposure. CONCLUSION: Both solar radiation and heat produced by the sun have a synergistic effect in killing cysts of Giardia duodenalis and Entamoeba histolytica/dispar when temperatures rise above 50 degrees C, with complete death at 56 degrees C, using painted 2-l PET containers. SIGNIFICANCE AND IMPACT OF THE STUDY: Solar disinfection system using PET containers painted black on one side can be used to disinfect water against Giardia duodenalis and Entamoeba histolytica/dispar using natural sunlight. SN - 1365-2672 UR - https://www.unboundmedicine.com/medline/citation/19191972/Impact_of_solar_radiation_in_disinfecting_drinking_water_contaminated_with_Giardia_duodenalis_and_Entamoeba_histolytica/dispar_at_a_point_of_use_water_treatment_ L2 - https://doi.org/10.1111/j.1365-2672.2008.04054.x DB - PRIME DP - Unbound Medicine ER -