Document Detail

Removal of noro- and enteroviruses, Giardia cysts, Cryptosporidium oocysts, and fecal indicators at four secondary wastewater treatment plants in Sweden.
MedLine Citation:
PMID:  17059136     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to investigate variation in the occurrence and removal of enteroviruses, noroviruses, Giardia cysts, Cryptosporidium oocysts, and the most commonly used fecal indicators in four Swedish secondary wastewater treatment plants (WWTPs). Paired samples were taken from the inlet and outlet of each WWTP. (Oo)cysts and indicators were enumerated with standard methods and viruses with a reverse transcriptase polymerase chain reaction. Giardia cysts and enteroviruses were constantly detected (mean numbers were 10(3.31) cysts and 10(4.44) polymerase chain reaction (PCR) units L(-1), respectively). Oocysts were found in 5 out of 19 samples (mean number was 20 L(-1)). Noroviruses were found between November and February, with an average titer of 10(3.29( L(-1). Mean cyst removal was 2.6 log, while noroviruses and enteroviruses were removed by 0.9 and 1.3 log, respectively. There was no correlation between the removals of pathogens and indicators (p > 0.05). Coliphage removal resembled human viral removal better than did F-specific phage.
J Ottoson; A Hansen; T Westrell; K Johansen; H Norder; T A Stenström
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water environment research : a research publication of the Water Environment Federation     Volume:  78     ISSN:  1061-4303     ISO Abbreviation:  Water Environ. Res.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-10-24     Completed Date:  2007-02-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886167     Medline TA:  Water Environ Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  828-34     Citation Subset:  IM    
Swedish Institute for Infectious Disease Control, Parasitology, Mycology and Environmental Microbiology, Solna.
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MeSH Terms
Cryptosporidium / isolation & purification*
Cysts / pathology
Enterovirus / isolation & purification*
Feces / microbiology
Giardia / isolation & purification*
Giardiasis / pathology
Norovirus / isolation & purification*
Oocysts / cytology
Waste Disposal, Fluid / methods
Water Microbiology*
Water Purification / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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