Occurrence and potential health risk of Cryptosporidium and Giardia in the Three Gorges Reservoir, China

Xiao, Guosheng; Qiu, Zhiqun; Qi, Junsheng; Chen, Jian; Liu, Fengdan; Liu, Wenyi; Luo, Jiaohua; Shu, Weiqun

doi:10.1016/j.watres.2013.02.019

Cited by 59 publications

(57 citation statements)

References 57 publications

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“…Fortunately, all the samples from cats and wastewater in the study were negative of Cryptosporidium spp., but the zoonotic species such as C. parvum and C. felis have been found in some studies [5,16], and in addition, more and more studies were involved in the water quality with this parasite including China, and different species and genotypes have been identified [17][18][19].…”

Section: The Studymentioning

confidence: 99%

Molecular identification of Cryptosporidium spp. from animal sources in China

Yin

Yuan

Shen

et al. 2013

J Infect Dev Ctries

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Section: The Studymentioning

confidence: 99%

Molecular identification of Cryptosporidium spp. from animal sources in China

Yin

Yuan

Shen

et al. 2013

J Infect Dev Ctries

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“…In the light of the important and sensitive location in the Three Gorges Reservoir, many researches on environmental problems were reported about Wanzhou. For example, Xiao et al [10,11] estimated the risk of infection with pathogens in Wanzhou watershed. Fu et al [12] evaluated the quality status of the sediments in Wanzhou section of TGR.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Carbonaceous Species in PM2.5 in Wanzhou in the Hinterland of the Three Gorges Reservior of Northeast Chongqing, China

et al. 2015

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Daily PM2.5 samples were collected in the four consecutive seasons in 2013 in Wanzhou, the second largest city in Chongqing Municipality of China and in the hinterland of the Three Gorges Reservior on Yangtze River and analyzed for the mass concentrations and carbonaceous species of PM2.5 to investigate the abundance and seasonal characteristics of PM2.5, and organic carbon (OC) and elemental carbon (EC). The annual average PM2.5 concentrations were 125.3 μg·m −3, while OC and EC were 23.6 μg·m −3 and 8.7 μg·m −3 , respectively. The total carbonaceous aerosol (TCA) accounted for 32.6% of the PM2.5 mass. On seasonal average, the OC and EC concentrations ranked in the order of winter > fall > spring > summer, which could be attributed to the combined effects of changes in local emissions and seasonal meteorological conditions. Strong OC-EC correlations were found in the winter and fall, suggesting the contributions of similar sources. The lowest OC-EC correlation occurred in the summer, probably due to the increases in biogenic emission and formation of secondary organic aerosol (SOA) through photochemical activity. Average secondary organic carbon (SOC) concentration was 9.0 μg·m −3 , accounting for 32.3% of the OPEN ACCESSAtmosphere 2015, 6 535 total OC. The average ratios of SOA/PM2.5 of 3.8%~15.7% indicated that SOA was a minor fraction in fine particles of Wanzhou.

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“…C. parvum is considered zoonotic because it has a lower host specificity, and it is thus of considerable interest to public health (FAYER, 2004). In China, Xiao et al (2013) found oocysts of this parasite in 86.4% of water catchment areas and Lee et al (2014) reported its prevalence in 23.1% of Malaysian rivers. In Brazil, Araújo et al (2011) described the occurrence of this parasite in 30% of the water samples collected in state of São Paulo, whereas Osaki et al (2013) found Cryptosporidium spp.…”

Section: Discussionmentioning

confidence: 99%

Occurrence of Cryptosporidium spp. and Giardia spp. in a public water-treatment system, Paraná, Southern Brazil

Almeida

Martins

Neto

et al. 2015

Rev. Bras. Parasitol. Vet.

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The purpose of this study was to investigate the occurrence of Cryptosporidium spp. and Giardia spp. in a public water-treatment system. Samples of raw and treated water were collected and concentrated using the membrane filtration technique. Direct Immunofluorescence Test was performed on the samples. DNA extraction using a commercial kit was performed and the DNA extracted was submitted to a nested-PCR reaction (n-PCR) and sequencing. In the immunofluorescence, 2/24 (8.33%) samples of raw water were positive for Giardia spp.. In n-PCR and sequencing, 2/24 (8.33%) samples of raw water were positive for Giardia spp., and 2/24 (8.33%) samples were positive for Cryptosporidium spp.. The sequencing showed Cryptosporidium parvum and Giardia duodenalis DNA. In raw water, there was moderate correlation among turbidity, color and Cryptosporidium spp. and between turbidity and Giardia spp.. The presence of these protozoans in the water indicates the need for monitoring for water-treatment companies.

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Occurrence and potential health risk of Cryptosporidium and Giardia in the Three Gorges Reservoir, China

Cited by 59 publications

References 57 publications

Molecular identification of Cryptosporidium spp. from animal sources in China

Molecular identification of Cryptosporidium spp. from animal sources in China

Characteristics of Carbonaceous Species in PM2.5 in Wanzhou in the Hinterland of the Three Gorges Reservior of Northeast Chongqing, China

Occurrence of Cryptosporidium spp. and Giardia spp. in a public water-treatment system, Paraná, Southern Brazil

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