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dc.contributor.author Kfir, R
dc.contributor.author Hilner, C
dc.contributor.author Du Preez, M
dc.contributor.author Bateman, B
dc.date.accessioned 2007-06-12T07:47:17Z
dc.date.available 2007-06-12T07:47:17Z
dc.date.issued 1995
dc.identifier.citation Kfir, R, et al. 1995. Studies on the prevalence of giardia cysts and cryptosporidium oocysts in South-African water. Water Science and Technology, vol. 31, 06 May, pp 435-438 en
dc.identifier.issn 0273-1223
dc.identifier.uri http://hdl.handle.net/10204/579
dc.description Copyright: 1995 Pergamon-Elsevier Science Ltd en
dc.description.abstract The levels of Giardia cysts and Cryptosporidium oocysts in 650 environmental water samples ere investigated. Cysts and oocysts were found in all types of water tested. The presence of Giardia cysts exceeded Cryptosporidium oocysts both in the number per sample and the number of positive samples. Almost 50% of sewage samples studied contained Giardia cysts and 30% contained both Giardia cysts and Cryptosporium oocysts. Treatment of sewage resulted in a reduction in the percentage of samples containing cysts and/or oocysts (30% of treated effluent samples were positive for Giardia and 25% had both cysts and oocysts). Higher numbers of Giardia cysts were found in surface water samples than in either sewage or treated effluents (55% of surface water samples were-positive). However, the number of cysts isolated per surface water sample was lower on average. Most water purification plants showed effective removal of cysts and oocysts. However, 13% of potable water samples contained protozoan parasites, indicating occasional failure of the purification processes and the need for monitoring final treated water. en
dc.language.iso en en
dc.publisher Pergamon-Elsevier Science Ltd en
dc.subject Giardia cysts en
dc.subject Cryptosporidium oocysts en
dc.subject Raw sewage en
dc.subject Treated effluents en
dc.subject Surface water en
dc.subject Drinking water en
dc.subject Purification processes en
dc.title Studies on the prevalence of giardia cysts and cryptosporidium oocysts in South-African water en
dc.type Article en


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