title: Moroccan Leishmania infantum: genetic diversity and population structure as revealed by multi-locus microsatellite typing.
abstract: Leishmania infantum causes Visceral and cutaneous leishmaniasis in northern Morocco. It predominantly affects children under 5 years with incidence of 150 cases/year. Genetic variability and population structure have been investigated for 33 strains isolated from infected dogs and humans in Morocco. A multilocus microsatellite typing (MLMT) approach was used in which a MLMtype based on size variation in 14 independent microsatellite markers was compiled for each strain. MLMT profiles of 10 Tunisian, 10 Algerian and 21 European strains which belonged to zymodeme MON-1 and non-MON-1 according to multilocus enzyme electrophoresis (MLEE) were included for comparison. A Bayesian model-based approach and phylogenetic analysis inferred two L.infantum sub-populations; Sub-population A consists of 13 Moroccan strains grouped with all European strains of MON-1 type; and sub-population B consists of 15 Moroccan strains grouped with the Tunisian and Algerian MON-1 strains. Theses sub-populations were significantly different from each other and from the Tunisian, Algerian and European non MON-1 strains which constructed one separate population. The presence of these two sub-populations co-existing in Moroccan endemics suggests multiple introduction of L. infantum from/to Morocco; (1) Introduction from/to the neighboring North African countries, (2) Introduction from/to the Europe. These scenarios are supported by the presence of sub-population B and sub-population A respectively. Gene flow was noticed between sub-populations A and B. Five strains showed mixed A/B genotypes indicating possible recombination between the two populations. MLMT has proven to be a powerful tool for eco-epidemiological and population genetic investigations of Leishmania.
authors.affiliation: Faculty of Pharmacy, Alquds University, Jerusalem, Palestine ; Institute of Microbiology and Hygiene, Charité University Medicine, Berlin, Germany.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Amro
authors.forename: Salsabil
authors.initials: S
authors.lastname: Hamdi
authors.forename: Meryem
authors.initials: M
authors.lastname: Lemrani
authors.forename: Idrissi
authors.initials: I
authors.lastname: Mouna
authors.forename: Hida
authors.initials: H
authors.lastname: Mohammed
authors.forename: Sabri
authors.initials: S
authors.lastname: Mostafa
authors.forename: Mohamed
authors.initials: M
authors.lastname: Rhajaoui
authors.forename: Omar
authors.initials: O
authors.lastname: Hamarsheh
authors.forename: Gabriele
authors.initials: G
authors.lastname: Schönian
mesh_terms: D014644:Genetic Variation / Q000235:genetics; D018314:Leishmania infantum / Q000145:classification / Q000235:genetics*; D018895:Microsatellite Repeats / Q000235:genetics*; D009018:Morocco; D010802:Phylogeny