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Hide M., Marion E., Pomares C., Fisa R., Marty P., Banuls Anne-Laure. (2013). Parasitic genotypes appear to differ in leishmaniasis patients compared with asymptomatic related carriers. International Journal for Parasitology, 43 (5), 389-397. ISSN 0020-7519

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Lien direct chez l'éditeur doi:10.1016/j.ijpara.2012.12.008

Titre
Parasitic genotypes appear to differ in leishmaniasis patients compared with asymptomatic related carriers
Année de publication2013
Type de documentArticle référencé dans le Web of Science WOS:000317557900007
AuteursHide M., Marion E., Pomares C., Fisa R., Marty P., Banuls Anne-Laure.
SourceInternational Journal for Parasitology, 2013, 43 (5), p. 389-397. ISSN 0020-7519
RésuméFor numerous infectious diseases affecting humans, clinical manifestations range from asymptomatic forms to severe pathologies. The originality of this study was its focus on asymptomatic carriers of Leishmania infantum in southern France. The fundamental interest in these asymptomatic carriers is that they can be a reservoir of potentially pathogenic microorganisms. It remains to be established whether the parasitic genomes from asymptomatic carriers differ from those of patients. Multilocus microsatellite typing was used to investigate the genetic variation among 36 French strains of L infantum. Nine Leishmania strains isolated from blood donors (asymptomatic carriers) were compared with 27 strains of L. infantum belonging to zymodemes, MON-1, -33 and -183. These strains were isolated from HIV positive or negative patients with visceral leishmaniasis, cutaneous leishmaniasis, from canine leishmaniasis or from phlebotomine sandflies. Multilocus microsatellite typing data generated using 33 loci were analyzed by a Bayesian model-based clustering algorithm and construction of a phylogenetic tree based on genetic distances. Both analyses structured the MON-1 sample into two main clusters. Furthermore, genetic analysis demonstrated that these nine asymptomatic carrier strains are divided into two clusters grouped with the MON-1 strains. One cluster with seven strains is related to, but different from, human symptomatic strains from the Alpes-Maritimes region whereas the other cluster has the two remaining strains together with canine leishmaniasis strains as well as one strain from a visceral leishmaniasis patient. Genetic diversity among asymptomatic carrier was very weak since the nine Leishmania strains belong to only two genotypes. Genetic differentiations were evidenced between asymptomatic carrier strains and non-asymptomatic carrier strains and especially between asymptomatic carrier and HIV+ populations, although these findings require confirmation with a larger sample size. We believe that our data explore for the first time, the genetic diversity among L. infantum from asymptomatic human carriers and reveal a weak polymorphism compared with Leishmania parasites isolated from human patients.
Plan de classementEntomologie médicale / Parasitologie / Virologie [052]
Descr. géo.FRANCE
LocalisationFonds IRD [F B010060820]
Identifiant IRDfdi:010060820
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010060820

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