L'association leishmaniose viscérale et leucémie aigue a été rarement rapportée dans la littérature, cependant le diagnostic concomitant de ces deux entités n'a jamais été rapporté au Maroc. Le lien entre ces deux pathologies n'a pas encore été établi et le traitement n'a pas encore été codifié. Nous rapportons le cas d'un garçon de 12 ans chez qui une leishmaniose viscérale et une leucémie aigue lymphoblastique type B ont été diagnostiquées simultanément. Malgré l'administration d'un traitement antiparasitaire associé à une chimiothérapie l’évolution était marquée par le décès du patient.
La leishmaniose viscérale est une maladie à transmission vectorielle liée essentiellement, au niveau de pourtour méditerranéen, à l'infection par leishmania infantum. Habituellement rare chez l'adulte, sa prévalence a récemment connu une augmentation y compris chez les sujets immunocompétents. Le but de notre étude est de présenter le profil épidémiologique de la leishmaniose viscérale chez l'adulte ainsi que l'importance du diagnostique biologique dans l'identification de cette maladie. Notre étude s'est étendue sur six ans de Janvier 2009 à Janvier 2014, et a colligé douze patients hospitalisés au Centre Hospitalier Universitaire Hassan II de Fès. L'altération de l’état général et la splénomégalie ont dominé le tableau clinique. Sur le plan biologique, l'anémie a été quasi constante. La confirmation diagnostique a consisté en la mise en évidence du parasite au niveau de la moelle. L’évolution sous traitement a été favorable pour tous nos patients. Ainsi, la recrudescence que connait la leishmaniose viscérale chez l'adulte et son tableau clinique peu spécifique doit la faire évoquer devant toute splénomégalie fébrile, afin de permettre un diagnostic et une prise en charge thérapeutique précoces.
Poster session 1, September 21, 2022, 12:30 PM - 1:30 PM Objectives Aspergillus flavus and closely related species could be pathogenic for humans, animals, and plants and could also produce mycotoxins. The members of the Flavi section are morphologically quite similar making precise identification to the species level difficult. In this study, we present the antifungal susceptibility profiles of French clinical isolates belonging to the Flavi section. Isolates have been characterized by molecular methods and the potential fitness-cost associated with azole-resistance has been determined. Methods A total of 120 isolates phenotypically identified as A. flavus were included in the study. These clinical isolates were recovered over a 15-year period (2001-2015). For all isolates, specific identification was confirmed by sequencing a part of the β-tubulin and calmodulin genes. The isolates were first screened for their susceptibility to azoles antifungal agents by using 3-sectors agar plates containing itraconazole, voriconazole, and a drug-free control. Susceptibility to six antifungal drugs was further determined by using the EUCAST reference microdilution broth technique. Fitness cost was evaluated by growth curve kinetics in RPMI and by evaluation of virulence in a Galleria mellonella invertebrate animal model. Results Out of 120 isolates, molecular analysis of the partial β-tubulin and calmodulin sequences showed that 117 isolates were A. flavus sensu stricto and the three remaining corresponded to A. parasiticus, A. nomius, and A. tamarii. Two isolates were azole-resistant by the screening test. For the A. flavus sensu stricto isolates, the geometric mean MIC values (range) of amphotericin B, itraconazole, voriconazole, posaconazole, isavuconazole, and caspofungin were 1.84 (0.25-16), 0.29 (0.125-2), 0.82 (0.5-8), 0.27 (0.06-2), 1.15 (0.25-8), and 0.061 (0.03-0.125) μg/ml, respectively. For A. parasiticus, A. nomius, and A. tamarii, MICs were in the same range. Two A. flavus sensu stricto isolates (AfR1 and AfR2) had voriconazole and isavuconazole MICs at 8 μg/ml. Compared to susceptible isolates, these two azole-resistant isolates had a delayed growth in RPMI liquid medium. In the G. mellonella model, the mortality was 100% for susceptible isolates. In contrast, the Galleria infected by AfR1 and AfR2 showed a significantly lower mortality rate. Conclusion Antifungal susceptibility to six drugs was determined on a large collection of clinical isolates belonging to Aspergillus Flavi section. Most of the isolates were identified as A. flavus sensu stricto and most of them were susceptible to antifungal drugs. Nevertheless, the occurrence of two resistant isolates highlights the need for susceptibility testing for A. flavus. It seems that azole-resistance is associated with a fitness-cost including a lower growth rate and a lower virulence.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.