title: Development of a multilocus microsatellite typing approach for discriminating strains of Leishmania (Viannia) species.
abstract: A multilocus microsatellite typing (MLMT) approach based on the analysis of 15 independent loci has been developed for the discrimination of strains belonging to different Viannia species. Thirteen microsatellite loci were isolated de novo from microsatellite-enriched libraries for both Leishmania braziliensis and L. guyanensis. Two previously identified markers, AC01 and AC16, were modified and added to our marker set. Markers were designed to contain simple dinucleotide repeats flanked by the minimal possible number of nucleotides in order to allow variations in repeat numbers to be scored as size variations of the PCR products. The 15 markers in total were amplified for almost all of the strains of Viannia tested; one marker did not amplify from the two L. peruviana strains included in the study. When 30 strains of L. braziliensis, 21 strains of L. guyanensis, and 2 strains of L. peruviana were tested for polymorphisms, all strains except two strains of L. guyanensis had individual MLMT types. Distance-based analysis identified three main clusters. All strains except one strain of L. guyanensis grouped together. Two clusters consisted of strains of L. braziliensis according to their geographical origins. The two strains of L. peruviana grouped together with strains of L. braziliensis from Peru and the adjacent Brazilian state of Acre. MLMT has proven capable of individualizing strains even from the same areas of endemicity and of detecting genetic structures at different levels. MLMT is thus applicable for epidemiological and population genetic studies of strains within the subgenus Viannia.
authors: Institut für Mikrobiologie und Hygiene, Universitätsmedizin Berlin, Dorotheenstr. 96, Berlin 10117, Germany.
authors: Rolando
authors: R
authors: Oddone
authors: Carola
authors: C
authors: Schweynoch
authors: Gabriele
authors: G
authors: Schönian
authors: Cintia dos Santos
authors: Cdos S
authors: de Sousa
authors: Elisa
authors: E
authors: Cupolillo
authors: Diego
authors: D
authors: Espinosa
authors: Jorge
authors: J
authors: Arevalo
authors: Harry
authors: H
authors: Noyes
authors: Isabel
authors: I
authors: Mauricio
authors: Katrin
authors: K
authors: Kuhls
mesh_terms: D000818:Animals; D016000:Cluster Analysis; D016172:DNA Fingerprinting / Q000379:methods*; D016054:DNA, Protozoan / Q000737:chemistry / Q000235:genetics*; D005838:Genotype; D005843:Geography; D006801:Humans; D007891:Leishmania / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D007896:Leishmaniasis / Q000469:parasitology*; D018895:Microsatellite Repeats; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods*; D011110:Polymorphism, Genetic; D017422:Sequence Analysis, DNA
chemical_list: D016054:DNA, Protozoan