Fachbereich Veterinärmedizin



    The mitochondrial genome of Parascaris univalens:
    implications for a "forgotten" parasite (2014)

    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Jabbar, Abdul
    Littlewood, D Timothy J
    Mohandas, Namitha
    Briscoe, Andrew G
    Foster, Peter G
    Müller, Fritz
    von Samson-Himmelstjerna, Georg (WE 13)
    Jex, Aaron R
    Gasser, Robin B
    Parasites & Vectors; 7 — S. 428
    ISSN: 1756-3305
    URL (Volltext): http://edocs.fu-berlin.de/docs/receive/FUDOCS_document_000000022569
    DOI: 10.1186/1756-3305-7-428
    Pubmed: 25190631
    Institut für Parasitologie und Tropenveterinärmedizin

    Robert-von-Ostertag-Str. 7-13
    Gebäude 35, 22, 23
    14163 Berlin
    Tel.+49 30 838 62310 Fax.+49 30 838 62323

    Abstract / Zusammenfassung

    Parascaris univalens is an ascaridoid nematode of equids. Little is known about its epidemiology and population genetics in domestic and wild horse populations. PCR-based methods are suited to support studies in these areas, provided that reliable genetic markers are used. Recent studies have shown that mitochondrial (mt) genomic markers are applicable in such methods, but no such markers have been defined for P. univalens.

    Mt genome regions were amplified from total genomic DNA isolated from P. univalens eggs by long-PCR and sequenced using Illumina technology. The mt genome was assembled and annotated using an established bioinformatic pipeline. Amino acid sequences inferred from all protein-encoding genes of the mt genomes were compared with those from other ascaridoid nematodes, and concatenated sequences were subjected to phylogenetic analysis by Bayesian inference.

    The circular mt genome was 13,920 bp in length and contained two ribosomal RNA, 12 protein-coding and 22 transfer RNA genes, consistent with those of other ascaridoids. Phylogenetic analysis of the concatenated amino acid sequence data for the 12 mt proteins showed that P. univalens was most closely related to Ascaris lumbricoides and A. suum, to the exclusion of other ascaridoids.

    This mt genome representing P. univalens now provides a rich source of genetic markers for future studies of the genetics and epidemiology of this parasite and its congener, P. equorum. This focus is significant, given that there is no published information on the specific prevalence and distribution of P. univalens infection in domestic and wild horse populations.