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Genetic and morphometric categorization of Taenia ovis from Sheep in Iran

Published online by Cambridge University Press:  13 November 2018

Sima Rostami
Affiliation:
Dietary Supplements and Probiotic Research Center, Alborz University of Medical Sciences, Karaj, Iran Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, 76169-14115, Iran
Reza Salavati
Affiliation:
Institute of Parasitology, McGill University, Ste. Anne de Bellevue, Quebec, Canada Department of Biochemistry, McGill University, Montreal, Quebec, Canada McGill Centre for Bioinformatics, McGill University, Montreal, Quebec, Canada
Robin N. Beech
Affiliation:
Institute of Parasitology, McGill University, Ste. Anne de Bellevue, Quebec, Canada Department of Biochemistry, McGill University, Montreal, Quebec, Canada McGill Centre for Bioinformatics, McGill University, Montreal, Quebec, Canada
Zahra Babaei
Affiliation:
Department of Medical Parasitology, School of Medicine, Kerman University of Medical Sciences, Kerman, 76169-14115, Iran
Mitra Sharbatkhori
Affiliation:
Department of Medical Parasitology and Mycology, School of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
Saeedeh Shamsaddini
Affiliation:
Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, 76169-14115, Iran
Saeid Nasibi
Affiliation:
Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, 76169-14115, Iran
Majid Fasihi Harandi*
Affiliation:
Research Center for Hydatid Disease in Iran, Kerman University of Medical Sciences, Kerman, 76169-14115, Iran
*
Author for correspondence: Majid Fasihi Harandi, E-mail: fasihi@kmu.ac.ir

Abstract

Little is known about the genetic and morphological characters of Taenia ovis. The purpose of the present study was to characterize sheep isolates of T. ovis using rostellar hook morphometry as well as mitochondrial genes sequence analysis. Ninety sheep specimens of Cysticercus ovis were collected from 18 slaughterhouses in Iran. The mean ± s.d. for total length of large and small hooks were 174.1 ± 6.4 and 116.7 ± 5.4 µm, respectively. CO1 and 12S rRNA sequence analysis showed 11 and nine haplotypes, respectively. The level of pairwise nucleotide variations between individual haplotypes of CO1 and 12S rRNA genes were 0.3–1.1 and 0.2–1.0%, respectively. Level of nucleotide variation in CO1 and 12S rRNA between T. ovis haplotypes from present study and eight other Taenia species was found to be 11.3–17.8 and 5.3–16.3%, respectively. Phylogenetic analysis clustered all T. ovis isolates into a single clade comprised of the all CO1 and 12S rRNA haplotypes. CO1 nucleotide difference between T. ovis ovis and T. asiatica was 13.6% that is lesser than the corresponding difference between T. ovis ovis and T. ovis krabbei, warranting the designation of two separate species as T. ovis and T. krabbei. Interclass correlation coefficients showed that there was no significant association between rostellar hook length variation and the variability of the mitochondrial genes.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2018 

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