Submitted: 27 Nov 2018
Revised: 07 Jan 2019
Accepted: 25 Jan 2019
First published online: 31 Jan 2019
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Int J Enteric Pathog. 2019;7(1):23-26.
doi: 10.15171/ijep.2019.06
  Abstract View: 583
  PDF Download: 474

Original Article

Investigation of Soil Contamination With Cryptosporidium spp. Oocysts in Different Regions of Yazd, Central Iran

Farzaneh Mirzaei 1, Mohammad Zibaei 2, Mohammad Ali Mohaghegh 3, Vahid Raissi 4 * ORCiD

1 School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
2 Department of Parasitology and Mycology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran.
3 Department of Laboratory Sciences, School of Paramedical Sciences, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
4 Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran


Background: Cryptosporidium species are coccidian parasites that cause gastrointestinal disorders in humans and other animals worldwide. Objective: The aim of this study was to demonstrate the rate of contamination with Cryptosporidium spp. oocysts in soils collected from public parks, primary schools, green areas, kindergartens, suburban areas, streets, residential complexes, backyards and a passenger terminal in Yazd, central Iran. Materials and Methods: This cross-sectional study was conducted from September 2014 to February 2015, and the samples were collected from 9 different study sites and 56 regions. Soil samples were investigated by flotation technique and modified Ziehl–Neelsen staining for Cryptosporidium spp. oocysts. Finally, the slides were examined with a light microscope. The data were analyzed using SPSS software version 20.0 and chi-square statistical test. Results: Of a total of 220 soil samples, 47 (21.36%) were found to contain Cryptosporidium spp. oocysts. Statistical analysis showed that there was no significant difference between the contamination rate and different study sites in Yazd, central Iran (P>0.05). The highest contamination rate was observed in public parks (38.3%) and the lowest in passenger terminal, kindergartens and streets (4.25%) (P=0.934). Conclusion: The results of the present study show that the contamination of soil with Cryptosporidium spp. can be considered a serious problem in Yazd, central Iran. It should be considered particularly in public parks.
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