Issue |
Parasite
Volume 19, Number 2, May 2012
|
|
---|---|---|
Page(s) | 177 - 182 | |
DOI | https://doi.org/10.1051/parasite/2012192177 | |
Published online | 15 May 2012 |
Research note
Molecular identification of Fasciola spp. (Digenea: Fasciolidae) in Egypt
Caractérisation moléculaire de Fasciola spp. en Egypte
1
Zoology Department, Faculty of Science, Tanta University, Egypt
2
Department of Zoology, Faculty of Science, Kafr El-Sheikh University, Kafr El Sheikh 33516, Egypt
3
EA 3174 Tropical and Comparative Neuroepidemiology, Institute of Tropical Neurology, and IFR 145, GEIST, Faculties of Medicine and Pharmacy, University of Limoges, France
* Correspondence: Said Amer. Tel./Fax: 2 047-3215176. E-mail: mssamer5@yahoo.com
Received:
24
October
2011
Accepted:
18
January
2012
A total of 134 Egyptian liver flukes were collected from different definitive hosts (cattle, sheep, and buffaloes) to identify them via the use of PCR-RFLP and sequence analysis of the first nuclear ribosomal internal transcribed spacer (ITS1). Specimens of F. hepatica from France, as well as F. gigantica from Cameroon were included in the study for comparison. PCR products of ITS1 were subjected for digestion by RsaI restriction enzyme and visualized on agarose gel. According to RFLP pattern, Egyptian flukes were allocated into two categories. The first was identical to that of French hepatica flukes to have a pattern of 360, 100, and 60 (bp) band size, whereas the second resembled to that of Cameroonian gigantica worms to have a profile of 360, 170, and 60 bp in size. Results of RFLP analysis were confirmed by sequence analysis of representative ITS1 amplicons. No hybrid forms were detected in the present study. Taken together, this study concluded that both species of Fasciola are present in Egypt, whereas the hybrid form may be not very common.
Résumé
Des douves égyptiennes (134 spécimens) provenant de différents hôtes définitifs (bovins, buffles et moutons) ont été analysées par PCR-RFLP et l’étude de la séquence ITS-1 pour identifier les espèces locales de Fasciola (F. hepatica, F. gigantica, ou les formes hybrides entre ces deux espèces). Des douves provenant de France (F. hepatica) et du Cameroun (F. gigantica) ont été utilisées comme références. Deux types de bandes ont été trouvés dans les fragments de la séquence ITS-1 : le premier type est identique à celui des F. hepatica de France (trois bandes de 60, 100 et 360 bp) tandis que le second ressemble à celui des F. gigantica du Cameroun (trois bandes de 60, 170 et 360 bp). De plus, le séquençage des amplicons ITS-1 confirme cette différence en montrant la présence de six sites nucléotidiques variables, ce qui permet de discriminer F. hepatica de F. gigantica. Aucune forme intermédiaire entre les deux Fasciola n’a été trouvée dans les spécimens analysés. Pris ensemble, cette étude permet de conclure que les deux espèces de Fasciola sont présentes en Égypte, alors que la forme hybride pourrait être pas très commune.
Key words: Fasciola gigantica / Fasciola hepatica / Egypt / PCR-RFLP
Mots clés : Fasciola gigantica / Fasciola hepatica / Égypte / PCR-RFLP
© PRINCEPS Editions, Paris, 2012, transferred to Société Française de Parasitologie
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