title: kDNA markers define two major Trypanosoma rangeli lineages in Latin-America.
abstract: Trypanosoma rangeli is a hemoflagellate parasite of man, domestic and wild animals in Central and South America. The genus Rhodnius is particularly susceptible to infection by T. rangeli and transmission by salivary inoculation has been demonstrated in 12 of 14 nominal species of naturally and experimentally infected insects. This report describes the molecular characterization of 37 strains of T. rangeli isolated from vertebrate and invertebrate hosts. Strains were analyzed by hybridization with kinetoplast DNA (kDNA) probes, polymerase chain reaction (PCR) amplification of kDNA minicircles and random amplification polymorphic DNA (RAPD). Strains isolated from Rhodnius prolixus present KP1, KP2 and KP3 minicircle amplification products but strains isolated from R. colombiensis or Panstrongylus megistus present amplification products derived only from KP2 and KP3 minicircles. The two T. rangeli groups defined as KP1(+) and KP1(-) present a high genetic divergence as they have probably been co-evolutioned with different adaptive radiated lines of the genus Rhodnius in Latin-America. The data obtained from insects with intestinal and salivary glands infections confirm that each Rhodnius species select the sub-population of T. rangeli KP1(+) or KP1(-) which is susceptible to transmit it by salivary inoculation to the vertebrate host.
authors.affiliation: Laboratorio de Investigaciones en Parasitología Tropical, Facultad de Ciencias, Universidad del Tolima, A.A. No. 546, Ibagué, Colombia. gvallejo@ibague.cetcol.net.co
authors.forename: Gustavo A
authors.initials: GA
authors.lastname: Vallejo
authors.forename: Felipe
authors.initials: F
authors.lastname: Guhl
authors.forename: Julio C
authors.initials: JC
authors.lastname: Carranza
authors.forename: Leyder E
authors.initials: LE
authors.lastname: Lozano
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Sánchez
authors.forename: José C
authors.initials: JC
authors.lastname: Jaramillo
authors.forename: Diego
authors.initials: D
authors.lastname: Gualtero
authors.forename: Nadia
authors.initials: N
authors.lastname: Castañeda
authors.forename: Julio C
authors.initials: JC
authors.lastname: Silva
authors.forename: Mário
authors.initials: M
authors.lastname: Steindel
mesh_terms: D000818:Animals; D018105:DNA, Kinetoplast / Q000235:genetics*; D004199:Disease Vectors; D004285:Dogs; D006801:Humans; D007843:Latin America; D016133:Polymerase Chain Reaction; D012239:Rhodnius / Q000469:parasitology*; D014345:Trypanosoma / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D014714:Vertebrates / Q000469:parasitology*
chemical_list: D018105:DNA, Kinetoplast