Genetic variation of Giardia lamblia isolates from food-handlers in Kashan, Central Iran

Hooshyar, H. and Ghafarinasab, S. and Arbabi, M. and Delavari, M. and Rasti, S. (2017) Genetic variation of Giardia lamblia isolates from food-handlers in Kashan, Central Iran. Iranian Journal of Parasitology, 12 (1). pp. 83-89.

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Abstract

Background: Based on genotyping study of human isolates of Giardia lamblia; humans are mainly infected by two assemblages A and B. The present study was carried out to determine the sub-assemblages of G. lamblia isolated from food handlers referred to Kashan health centers, central Iran, 2015. Methods: In this cross-sectional study, 3653 stool samples collected from food-handlers that annually refer to health center for getting a health certification and examined microscopically for G. lamblia cyst. Totally, 44 isolates were selected from 47 Giardia positive samples. Cysts were partially purified by the sucrose density gradient method. After freeze-thaw cycles, genomic DNA was extracted using QIAamp Stool Mini kit. A single step PCR-RFLP method was used to amplify a 458bp fragment at the glutamate dehydrogenase (gdh) locus, restriction enzymes BspLI and RsaI were used for distinguish between genotypes A and B and their subgroups. Results: Of 44 isolates, 24(54.5%) were sub-assemblage AII, 9(20.5%) group B including 7(15.9%) BIII and 2(4.6%) BIV sub-assemblage and 11(25%) isolates showed a mixed pattern of AII and B. Sub-assemblage AI was not detected in this study. Conclusion: The higher rate of sub-assemblage AII demonstrated an anthropo-notic origin of the infection so infected food-handlers could directly transmit this protozoan to consumers via contaminated food and water. For finding of pattern of transmission and distribution of Giardia assemblages and sub-assemblage, more studies in human and animal population in different regions are necessary. © 2017, Tehran University of Medical Sciences (TUMS). All rights reserved.

Item Type: Article
Additional Information: cited By 0
Subjects: Immunology and Microbiology
Divisions: Faculty of Medicine > Basic Sciences > Department of Parasitological & Mycology
Depositing User: ART . editor
Date Deposited: 31 Jul 2017 14:39
Last Modified: 31 Jul 2017 14:39
URI: http://eprints.kaums.ac.ir/id/eprint/2677

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