title: New approach to molecular characterization of Paramphistomum cervi and Carmyerius gregarius and comparative analyses with selected trematodes.
abstract: The two ruminant parasites, Paramphistomum cervi and Carmyerius gregarius, were collected from fresh-slaughtered native cattle at local abattoirs in Sadat district, Menoufia province and identified morphologically, then molecularly by sequencing the nucleotides of 18S ribosomal RNA gene (18S rRNA). The nucleotide sequences of the two isolates were 456 (P. cervi) and 401 bases for (C. gregarius). The data were used along with those of several other helminth species from the GenBank to identify these two species genetically. The nucleotide sequences were aligned using multiple sequence alignments of nucleotides by Clustal W 12.1 V and construct their relationship. Neighbor-joining analytical method was used showing sister relationship between C. gregarius from Sadat district and Gastrodiscoides hominis (EF027096) with relative identity of (98%) due to the presence of single nucleotides polymorphisms (SNPs) in the form of indels as nine nucleotides positions. But when clustering of P. cervi Sadat isolate with Paramphistomoidea sp. S4 isolate P5 (GU735643), this relationship shows complete identity (99%) between them. The homology and diversity was done using Bayesian analyses in MrBayes v3.1. This work will give a useful guide for other researchers for the molecular taxonomic position of Paramphistomatidae spp. in Sadat district among the different species around the world.
authors.affiliation: Department of Parasitology, Faculty of Veterinary Medicine, Sadat City University, Menoufia, Egypt.
authors.forename: Nasr M
authors.initials: NM
authors.lastname: El-Bahy
authors.affiliation: Department of Pathology and Parasitology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt. ebazh@yahoo.com.
authors.forename: Eman K
authors.initials: EK
authors.lastname: Bazh
authors.affiliation: Department of Parasitology, Faculty of Veterinary Medicine, Sohag University, Sohag, Egypt.
authors.forename: Amer R
authors.initials: AR
authors.lastname: Abdel Azizn
authors.affiliation: Department of Parasitology, Faculty of Veterinary Medicine, Sadat City University, Menoufia, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Elkhtam
mesh_terms: D000818:Animals; D001482:Base Composition / Q000235:genetics; D001483:Base Sequence; D001499:Bayes Theorem; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D004534:Egypt; D010250:Paramphistomatidae / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D010802:Phylogeny; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*
chemical_list: D012337:RNA, Ribosomal, 18S
keywords: 18S rRNA; Genetic characterization; Paramphistomoidea