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  • Title: Genetic characterization and phylogenetic analysis of Eimeria arloingi in Iranian native kids.
    Author: Khodakaram-Tafti A, Hashemnia M, Razavi SM, Sharifiyazdi H, Nazifi S.
    Journal: Parasitol Res; 2013 Sep; 112(9):3187-92. PubMed ID: 23779225.
    Abstract:
    Among the 16 species of Eimeria from goats, Eimeria arloingi and Eimeria ninakohlyakimovae are regarded as the most pathogenic species in the world and cause clinical caprine coccidiosis. E. arloingi is known to be an important cause of coccidiosis in Iranian kids. Molecular analyses of two portions of nuclear ribosomal DNA (internal transcribed spacer1 (ITS1) and 18S rDNA) were used for the genetic characterization of the E. arloingi. Comparison of the sequencing data of E. arloingi obtained in the present study (ITS1: KC507793 and 18S rDNA: KC507792) with other Eimeria species in the GenBank database revealed a particularly close relationship between E. arloingi and Eimeria spp. from the cattle and sheep. The phylogram based on the ITS1 sequences shows that the E. arloingi, Eimeria bovis, and Eimeria zuernii formed a distinct group separate from the other remaining Eimeria spp. in cattle and poultry. In pairwise alignment, 18S rDNA sequence derived from E. arloingi showed 99% similarity to Eimeria ahsata with differences observed at only three nucleotides. This study showed that the ITS1 and 18S rDNA gene are useful genetic markers for the specific identification and differentiation of Eimeria spp. in ruminants.
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