Evidence map›Paper›PMID 21498768›Full record

ArticleApplied and environmental microbiology2011

Occurrence, source, and human infection potential of cryptosporidium and Giardia spp. in source and tap water in shanghai, china.

Yaoyu Feng, Xukun Zhao, Jiaxu Chen, Wei Jin, Xiaonong Zhou, Na Li, Lin Wang, Lihua Xiao

Open access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed, 2 pooled it
4.5field-weighted citation impact, top 5% of its field
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

40 citing papers in PubMed, 2 syntheses or guidelines pooled it, 93 citations in OpenAlex.

  1. Prevalence of Cryptosporidium spp. in water: a global systematic review and meta-analysis.Environmental science and pollution research international · 2021
    Pooled it
  2. Pooled it
  3. Current research in parasitology & vector-borne diseases · 2025
    Article
  4. Article
  5. Article
  6. Assessment of the potential occurrence ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2024
    Article
  7. Molecular characterization ofFrontiers in veterinary science · 2024
    Article
  8. Article
  9. The Occurrence ofPathogens (Basel, Switzerland) · 2023
    Article
  10. Detection ofMicroorganisms · 2022
    Review
  11. First Characterization and Zoonotic Potential ofFrontiers in cellular and infection microbiology · 2022
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Label-Free Capacitive Biosensor for Detection ofSensors (Basel, Switzerland) · 2019
    Article
  17. Article
  18. Article
  19. Article
  20. Occurrence ofThe Korean journal of parasitology · 2017
    Article
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

8 authors at 4 institutions in 2 countries.

Yaoyu FengState Key Laboratory of Bioreactor Engineering, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, China. yyfeng@ecust.edu.cn
Xukun Zhao
Jiaxu Chen
Wei Jin
Xiaonong Zhou
Na Li
Lin Wang
Lihua Xiao
East China University of Science and Technology · CNCenters for Disease Control and Prevention · USNational Institute for Parasitic Diseases · CNTongji University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Genotyping studies on the source and human infection potential of Cryptosporidium oocysts in water have been almost exclusively conducted in industrialized nations. In this study, 50 source water samples and 30 tap water samples were collected in Shanghai, China, and analyzed by the U.S. Environmental Protection Agency (EPA) Method 1623. To find a cost-effective method to replace the filtration procedure, the water samples were also concentrated by calcium carbonate flocculation (CCF). Of the 50 source water samples, 32% were positive for Cryptosporidium and 18% for Giardia by Method 1623, whereas 22% were positive for Cryptosporidium and 10% for Giardia by microscopy of CCF concentrates. When CCF was combined with PCR for detection, the occurrence of Cryptosporidium (28%) was similar to that obtained by Method 1623. Genotyping of Cryptosporidium in 17 water samples identified the presence of C. andersoni in 14 water samples, C. suis in 7 water samples, C. baileyi in 2 water samples, C. meleagridis in 1 water sample, and C. hominis in 1 water sample. Therefore, farm animals, especially cattle and pigs, were the major sources of water contamination in Shanghai source water, and most oocysts found in source water in the area were not infectious to humans. Cryptosporidium oocysts were found in 2 of 30 tap water samples. The combined use of CCF for concentration and PCR for detection and genotyping provides a less expensive alternative to filtration and fluorescence microscopy for accurate assessment of Cryptosporidium contamination in water, although the results from this method are semiquantitative.

Indexed as

AnimalsCalcium CarbonateCattleChemical FractionationChinaCryptosporidiumDNA, ProtozoanGenotypeGiardiaHumansMicroscopyMolecular EpidemiologyParasitologyPolymerase Chain ReactionSwineWaterCalcium CarbonateDNA, ProtozoanWater

Identifiers

PMID21498768
PMCPMC3127622
OpenAlexW2098728229

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.