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Khatoonaki H, Solhjoo K, Rezanezhad H, Armand B, Abdoli A, Taghipour A. Isolation and identification of potentially pathogenic free-living amoeba in dental-unit water samples. J Water Health 2022; 20:1126-1136. [PMID: 35902994 DOI: 10.2166/wh.2022.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Although the presence of free-living amoebae (FLAs) in various water sources has been reported, few studies have been surveyed on their abundance in medical-unit and dental-unit water samples. The current study aimed to identify morphological and molecular characteristics of FLA isolates in the water samples of the dental unit in Iran. A total of 232 water samples were collected from 17 dental units. Then, filtration and cultivation were conducted on a non-nutrient agar (NNA) medium. Also, polymerase chain reaction (PCR) assay and sequencing were performed by using the genus/species-specific primers plus a common primer set on positive samples. One hundred and sixty-six samples were positive for FLA by the microscopic method, whereas 114 samples were positive by the molecular method with a common primer set. Considering the PCR assay with genus/species-specific primers, 23.27% (54/232) samples were identified as Acanthamoeba spp. (belonging to T4 genotype), 36.63% (85/232) as Vermamoeba vermiformis, and 1.72% (4/232) as Vahlkampfiidae family (Naegleria lovaniensis). These results highlight a need to improve filtration systems in dental units and periodic screenings for FLA in dental-unit water.
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Affiliation(s)
- Hadi Khatoonaki
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran E-mail:
| | - Kavous Solhjoo
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran E-mail: ; Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Hassan Rezanezhad
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran E-mail: ; Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Belal Armand
- Institute of Precision Medicine, Medical and Life Sciences Faculty, Furtwangen University, Furtwangen, Germany
| | - Amir Abdoli
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran E-mail: ; Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Ali Taghipour
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran E-mail: ; Zoonoses Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
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