Cryptosporidium spp. and Giardia spp. in surface water supply of Campinas, southeast Brazil

Surface water contaminated by domestic sewage discharges is a potential source of pathogens, including protozoa. During 2005-2006, the source water (Atibaia River) of the Surface Water Treatment Plant (WTP) of Campinas city, São Paulo, Brazil was sampled to obtain an assessment of Cryptosporidium oo...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2010-01, Vol.62 (1), p.217-222
Main Authors: Neto, Romeu Cantusio, dos Santos, Luciana Urbano, Sato, Maria Ines Zanoli, Franco, Regina Maura Bueno
Format: Article
Language:English
Subjects:
Brazil
Calcium
Calcium Carbonate
Calcium carbonates
Carbonates
Contamination
Cryptosporidium
Cryptosporidium - isolation & purification
Cysts
Discharge
Filtration
Flocculation
Freshwater
Giardia
Giardia - isolation & purification
Household wastes
Immunofluorescence
Immunomagnetic Separation
Membrane filtration
Membranes, Artificial
Oocysts
Pathogens
Protozoa
Purification
Rivers
Rivers - parasitology
Sewage
Surface water
Water - parasitology
Water analysis
Water pollution
Water purification
Water sampling
Water supply
Water Supply - statistics & numerical data
Water treatment
Water treatment plants
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Surface water contaminated by domestic sewage discharges is a potential source of pathogens, including protozoa. During 2005-2006, the source water (Atibaia River) of the Surface Water Treatment Plant (WTP) of Campinas city, São Paulo, Brazil was sampled to obtain an assessment of Cryptosporidium oocyst and Giardia cyst concentrations. Calcium carbonate flocculation (CCF) and membrane filtration (MF) concentration techniques, with and without purification by immunomagnetic separation (IMS) were evaluated. The cysts and oocysts were detected by immunofluorescence assay (IFA) and confirmed by differential interference contrast (DIC). Membrane filtration method generally produced higher recovery efficiency. Giardia spp. was detected in 87.5% of the water samples analyzed with densities ranging from 2.5 to 120 cysts per L. Cryptosporidium spp were detected in 62.5% and the concentrations ranged from 15 to 60 oocysts per L. Cryptosporidium oocyst and Giardia cyst concentrations detected in this study were elevated and are associated with discharge of untreated sewage in Atibaia River. Measures should be taken to protect surface water from sources of contamination.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2010.312