Evidence map›Paper›PMID 25653867›Full record

ArticleJournal of environmental health science & engineering2015

Detection of parasitic particles in domestic and urban wastewaters and assessment of removal efficiency of treatment plants in Tehran, Iran.

Kareem Hatam-Nahavandi, Amir Hossein Mahvi, Mehdi Mohebali, Hossein Keshavarz, Iraj Mobedi, Mostafa Rezaeian

Open access · hybridAbstract read
In one paragraph

Article in Journal of environmental health science & engineering, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 pooled it
4.0field-weighted citation impact, top 6% 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

15 citing papers in PubMed, 2 syntheses or guidelines pooled it, 54 citations in OpenAlex.

  1. Global Burden ofMedicina (Kaunas, Lithuania) · 2026
    Pooled it
  2. Pooled it
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. A Review ofPathogens (Basel, Switzerland) · 2019
    Review
  12. Article
  13. Article
  14. Article
  15. Microscopic and Molecular Detection ofIranian journal of parasitology
    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

6 authors at 1 institution in 1 country.

Kareem Hatam-NahavandiDepartment of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Amir Hossein MahviDepartment of Environmental Health Engineering, School of Public Health, and Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran.
Mehdi MohebaliDepartment of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ; Center for Research of Endemic Parasites of Iran (CREPI), Tehran University of Medical Sciences, Tehran, Iran.
Hossein KeshavarzDepartment of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Iraj MobediDepartment of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Mostafa RezaeianDepartment of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Tehran University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn recent years, decreasing annual rainfalls in some countries and population growth have led to a shortage of freshwater resources. Thus, recycled wastewaters has been suggested for agricultural activities. Contamination of wastewaters with pathogens is a major concern for the use of these waters. This study aimed to (i) investigate the occurrence of helminth eggs and protozoan (oo)cysts in human and livestock wastewaters, and (ii) evaluate the parasite removal efficiencies of urban and slaughterhouse treatment plants in Tehran province, Iran. One hundred and eight samples were collected from five urban and domestic wastewater treatment plants in Iran. Wastewater samples were concentrated by centrifugal-concentration and filtration methods.

resultsThe quantity of helminths egg and protozoa (oo)cyst per liter of urban raw wastewater ranged from 1.2 × 10(1) to 2.9 × 10(1) and from 9.6 × 10(2) to 1.9 × 10(3), respectively. The number of eggs and (oo)cysts per liter of animal raw wastewater ranged from 1.6 × 10(3) to 4.9 × 10(3) and 3.1 × 10(4) to 6.0 × 10(4), respectively. The helminths and protozoa identified in urban treatment plants included hookworms, Hymenolepis and Rhabditis (or probably Strongyloides), Entamoeba, Isospora, Giardia, Chilomastix and Cryptosporidium, while in slaughterhouses Trichuris, Trichostrongylus, Moniezia, Dicrocoelium, Fasciola, Entamoeba, Cryptosporidium, Eimeria and Giardia were isolated. The overall removal efficiency of eggs and (oo)cysts in the treatment plants ranged from 94.8 to 95.7% and from 79.3 to 85.8%, respectively.

conclusionThe study results revealed that the efficacy of removal of nematode eggs, and not protozoan (oo)cysts, in urban wastewater treatment plants, is in compliance with the WHO parasitological guideline (<1 nematode per liter) required for unrestricted irrigation.

Indexed as

Helminth eggIranProtozoan (oo)cystSlaughterhouseWastewater treatment plant

Identifiers

PMID25653867
PMCPMC4316801
OpenAlexW2022405031

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.