title: Limited range of genetic variation in Echinococcus multilocularis.
abstract: DNA sequencing of 1.3 kb of rDNA containing both internal transcribed spacers (ITS1, ITS2) and adjoining rRNA coding regions in each of 11 Echinococcus multilocularis isolates from Germany, Japan, and Alaska resulted in identical nucleotide sequences except for a single polymorphic locus 54 bp upstream of the 3' end of the 18S coding region, separating Eurasian isolates from an Alaskan isolate. The same base substitution was found in each of 2 additional isolates from Alaska. The distribution of the resulting genotypes with regard to their origin is highly significant (>99.9%) and corresponds to the traditional subspecies Echinococcus multilocularis multilocularis and Echinococcus multilocularis sibiricensis.
authors.affiliation: Department of Infectious Diseases and Tropical Medicine, Munich, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Rinder
authors.forename: R L
authors.initials: RL
authors.lastname: Rausch
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: H
authors.initials: H
authors.lastname: Kopp
authors.forename: A
authors.initials: A
authors.lastname: Thomschke
authors.forename: T
authors.initials: T
authors.lastname: Löscher
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000469:parasitology; D018509:DNA, Helminth / Q000145:classification / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000145:classification / Q000302:isolation & purification; D004446:Echinococcus / Q000235:genetics* / Q000302:isolation & purification; D005589:Foxes / Q000469:parasitology; D005819:Genetic Markers; D014644:Genetic Variation; D005828:Genetics, Population; D005849:Gerbillinae / Q000469:parasitology; D006801:Humans; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic; D013045:Species Specificity
chemical_list: D018509:DNA, Helminth; D004275:DNA, Ribosomal; D005819:Genetic Markers