Issue |
Parasite
Volume 24, 2017
|
|
---|---|---|
Article Number | 30 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.1051/parasite/2017025 | |
Published online | 02 August 2017 |
Research Article
Sarcocystis spp. in domestic sheep in Kunming City, China: prevalence, morphology, and molecular characteristics
Sarcocystis spp. chez les moutons domestiques à Kunming, en Chine : prévalence, morphologie et caractéristiques moléculaires
1
School of Biological Sciences, Yunnan University, Kunming
650091, PR China
2
Southeast Asia Biodiversity Research Institute, Chinese Academy of Sciences, Yezin, Nay Pyi Taw
05282, Myanmar
3
Department of Biology, Wake Forest University, Winston-Salem, NC
27106, USA
* Corresponding author: jjhu@ynu.edu.cn
Received:
6
May
2017
Accepted:
9
June
2017
Sheep (Ovis aries) are intermediate hosts for at least six named species of Sarcocystis: S. tenella, S. arieticanis, S. gigantea, S. medusiformis, S. mihoensis, and S. microps. Here, only two species, S. tenella and S. arieticanis, were found in 79 of 86 sheep (91.9%) in Kunming, China, based on their morphological characteristics. Four genetic markers, i.e., 18S rRNA gene, 28S rRNA gene, mitochondrial cox1 gene, and ITS-1 region, were sequenced and characterized for the two species of Sarcocystis. Sequences of the three former markers for S. tenella shared high identities with those of S. capracanis in goats, i.e., 99.0%, 98.3%, and 93.6%, respectively; the same three marker sequences of S. arieticanis shared high identities with those of S. hircicanis in goats, i.e., 98.5%, 96.5%, and 92.5%, respectively. No sequences in GenBank were found to significantly resemble the ITS-1 regions of S. tenella and S. arieticanis. Identities of the four genetic markers for S. tenella and S. arieticanis were 96.3%, 95.4%, 82.5%, and 66.2%, respectively.
Résumé
Les moutons (Ovis aries) sont des hôtes intermédiaires pour au moins 6 espèces nommées de Sarcocystis : S. tenella, S. arieticanis, S. gigantea, S. medusiformis, S. mihoensis et S. microps. Ici, seules deux espèces, S. tenella et S. arieticanis ont été trouvées dans 79 (91.9 %) de 86 moutons à Kunming, en Chine, en fonction de leurs caractéristiques morphologiques. Quatre marqueurs génétiques, le gène de l’ARNr 18S, le gène de l’ARNr 28S, le gène mitochondrial cox1 et la région de l’ITS-1 ont été séquencés et caractérisés pour les deux espèces de Sarcocystis. Les séquences des trois premiers marqueurs de S. tenella partageaient des similarités élevées avec celles de S. capracanis chez les chèvres, soit 99.0 %, 98.3 % et 93.6 %, respectivement; les trois mêmes marqueurs de S. arieticanis partageaient des identités élevées avec ceux de S. hircicanis chez les chèvres, à savoir 98.5 %, 96.5 % et 92.5 %, respectivement. Aucune séquence de GenBank ne ressemble significativement aux régions ITS-1 de S. tenella et S. arieticanis. Les identités des quatre marqueurs génétiques de S. tenella et S. arieticanis étaient respectivement de 96.3 %, 95.4 %, 82.5 % et 66.2 %.
Key words: Sheep / Sarcocystis / Prevalence / Morphology / Molecular characteristics / China
© J.-J. Hu et al., published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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