Evidence map›Paper›PMID 31172433›Full record

ArticleEnvironmental science and pollution research international2019

Giardia spp. and Cryptosporidium spp. removal efficiency of a combined fixed-film system treating domestic wastewater receiving hospital effluent.

Sandra Yamashiro, Mário Luiz Rodrigues Foco, Carolina Ortiz Pineda, Juliana José, Edson Aparecido Abdul Nour, Isabel Cristina Vidal Siqueira-Castro, Regina Maura Bueno Franco

Abstract read
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In one paragraph

Article in Environmental science and pollution research international, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

  1. Review
  2. Multilocus Genotyping ofPathogens (Basel, Switzerland) · 2021
    Article
  3. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Sandra YamashiroLaboratory of Protozoology, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Monteiro Lobato Street, n°255, Campinas, São Paulo State, Brazil.
Mário Luiz Rodrigues FocoDepartment of Sanitation and Environment, School of Civil Engineering, Architecture and Urban Design, University of Campinas (UNICAMP), Campinas, São Paulo State, Brazil.
Carolina Ortiz PinedaLaboratory of Protozoology, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Monteiro Lobato Street, n°255, Campinas, São Paulo State, Brazil.
Juliana JoséDepartment of Genetic and Evolution, Institute of Biology, University of Campinas (UNICAMP), Campinas, São Paulo State, Brazil.
Edson Aparecido Abdul NourDepartment of Sanitation and Environment, School of Civil Engineering, Architecture and Urban Design, University of Campinas (UNICAMP), Campinas, São Paulo State, Brazil.
Isabel Cristina Vidal Siqueira-CastroLaboratory of Protozoology, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Monteiro Lobato Street, n°255, Campinas, São Paulo State, Brazil.
Regina Maura Bueno FrancoLaboratory of Protozoology, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Monteiro Lobato Street, n°255, Campinas, São Paulo State, Brazil. mfranco@unicamp.br.ORCID http://orcid.org/0000-0003-1920-6140

Funding

Fundação de Amparo à Pesquisa do Estado de São Paulo 2011/21878-9Fundo de Apoio ao Ensino, à Pesquisa e Extensão, Universidade Estadual de Campinas 2013 56/14
6 · The paper itself

Abstract

Giardia and Cryptosporidium have caused numerous outbreaks of diarrhea as a result of the ingestion of water contaminated with sewage. In Brazil, the efficiency of Giardia and Cryptosporidium removal by combined fixed-film systems has rarely been studied. The aims of the present study were therefore to verify the removal efficiency of Giardia and Cryptosporidium by a combined system (anaerobic/anoxic filter and aerated submerged biofilter) and to perform the genetic characterization of these parasites. The (oo)cysts were detected by centrifuge concentration and membrane filtration from raw sewage, effluents, adhered biomass, and sludge samples. Immunofluorescence assay and differential interference contrast microscopy were used for the visualization of the (oo)cysts. Nested PCR was applied to confirm Giardia and Cryptosporidium. Giardia and Cryptosporidium were detected in 27% and 5.5% of the 144 analyzed samples of raw sewage and effluents, respectively. A total of 33,000 cysts/L were recovered in the adhered biomass samples (n = 25) from different points of the aerated submerged biofilter, while 6000 oocysts/L were registered in a single point. An average of 11,800 cysts/L were found in the sludge samples (n = 5). The combined system exhibited a removal efficiency of Giardia cysts of 1.8 ± 1.0 log removal. The C and BIV assemblages of Giardia were identified in the raw sewage while AII was found in the treated effluent sample. It was not possible to calculate the removal efficiency of Cryptosporidium oocysts by the combined system. The combined system exhibited some potential as a suitable treatment for the removal of parasites from sewage.

Indexed as

CryptosporidiumGiardiaAnimalsBrazilGiardiasisHospitalsOocystsSewageWaste Disposal, FluidWastewaterSewageWastewaterAdhered biomassCombined systemCryptosporidiumGiardiaHospital effluent

Identifiers

PMID31172433

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.