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Effect of ozone on the viability of some protozoa in drinking water.
J Egypt Soc Parasitol. 2001 Aug; 31(2):603-16.JE

Abstract

Water samples from household tanks in several districts of Alexandria, were examined for protozoa contamination and study to the effect of ozone and chlorine on their viability. The parasitic protozoa encountered were Giardia (56%), Cryptosporidia (50%), Blastocystis (12%), Cyclospora (9%) and Microsporidia (3%). Distilled water was treated by ozone or chlorine. Ozonated-water samples were prepared at a concentration of 1 ppm after contact times with ozone of three, five, seven and nine minutes. Chlorine concentrations were 4 and 8 ppm. Parasites were incubated overnight at room temperature with the treated distilled water. Viability of the parasites was assessed by examining intestinal sections of infected animals. The best results were obtained by using ozonated water after a contact time of nine minutes. Giardia, Cryptosporidia and Microsporidia were completely inactivated, while infectivity of Cyclospora and Blastocystis was markedly reduced. It is suggested that ozone at an appropriate concentration inactivate pathogenic protozoa in water.

Authors+Show Affiliations

Department of Parasitology, Faculty of Medicine, Alexandria University, Egypt.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

11478459

Citation

Khalifa, A M., et al. "Effect of Ozone On the Viability of some Protozoa in Drinking Water." Journal of the Egyptian Society of Parasitology, vol. 31, no. 2, 2001, pp. 603-16.
Khalifa AM, El Temsahy MM, Abou El Naga IF. Effect of ozone on the viability of some protozoa in drinking water. J Egypt Soc Parasitol. 2001;31(2):603-16.
Khalifa, A. M., El Temsahy, M. M., & Abou El Naga, I. F. (2001). Effect of ozone on the viability of some protozoa in drinking water. Journal of the Egyptian Society of Parasitology, 31(2), 603-16.
Khalifa AM, El Temsahy MM, Abou El Naga IF. Effect of Ozone On the Viability of some Protozoa in Drinking Water. J Egypt Soc Parasitol. 2001;31(2):603-16. PubMed PMID: 11478459.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of ozone on the viability of some protozoa in drinking water. AU - Khalifa,A M, AU - El Temsahy,M M, AU - Abou El Naga,I F, PY - 2001/8/2/pubmed PY - 2001/10/5/medline PY - 2001/8/2/entrez SP - 603 EP - 16 JF - Journal of the Egyptian Society of Parasitology JO - J Egypt Soc Parasitol VL - 31 IS - 2 N2 - Water samples from household tanks in several districts of Alexandria, were examined for protozoa contamination and study to the effect of ozone and chlorine on their viability. The parasitic protozoa encountered were Giardia (56%), Cryptosporidia (50%), Blastocystis (12%), Cyclospora (9%) and Microsporidia (3%). Distilled water was treated by ozone or chlorine. Ozonated-water samples were prepared at a concentration of 1 ppm after contact times with ozone of three, five, seven and nine minutes. Chlorine concentrations were 4 and 8 ppm. Parasites were incubated overnight at room temperature with the treated distilled water. Viability of the parasites was assessed by examining intestinal sections of infected animals. The best results were obtained by using ozonated water after a contact time of nine minutes. Giardia, Cryptosporidia and Microsporidia were completely inactivated, while infectivity of Cyclospora and Blastocystis was markedly reduced. It is suggested that ozone at an appropriate concentration inactivate pathogenic protozoa in water. SN - 1110-0583 UR - https://www.unboundmedicine.com/medline/citation/11478459/Effect_of_ozone_on_the_viability_of_some_protozoa_in_drinking_water_ L2 - https://medlineplus.gov/ozone.html DB - PRIME DP - Unbound Medicine ER -
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