Genotipificación de aislamientos clínicos de Aspergillus flavus y su relación con aislamientos ambientales de un centro oncohematológico
Por:
Refojo N., Duarte-Escalante E., Dignani M.C., Hevia A.I., Abrantes R.A., Davel G., Canteros C., de Leon, MGF, Acosta-Altamirano G., Zuniga, G, Reyes-Montes, MD
Publicada:
31 ene 2013
Resumen:
Background: During 4 months, and while conducting an environmental sampling of air, 2 cases of aspergillosis by Aspergillus flavus (A. flavus) were diagnosed at an oncohematological center in Buenos Aires, Argentina. Aims: The aim of this study was to know the variability and the genetic relationship between the clinical and environmental isolates, obtained in the oncohematological center. Methods: Two genotyping techniques of different discriminatory power (RAPD and AFLP) were used. A genetic similarity matrix was calculated using Jaccard method and was the basis for the construction of a dendrogram by UPGMA. The level of genetic variability was assessed by measuring the percentage of polymorphic loci, number of effective allele, expected heterocygozity and association index test (IA). Results: The dendrogram reveals that the A. flavus isolates recovered from the patients were not genetically related to those gotten from the rooms occupied by the patients. The environmental isolates had higher values of genetic diversity than the clinical isolates. The IA estimated for all the isolates suggest that recombination events occurred. Conclusions: Patients 1 and 2 were not infected with isolates from the nosocomial environment. Clinical and environmental isolates of A. flavus showed high genetic variability among them. © 2012 Revista Iberoamericana de Micología.
Filiaciones:
Refojo N.:
Departamento de Micología, INEI ANLIS Dr. Carlos G. Malbrán, Buenos Aires, Argentina
Duarte-Escalante E.:
Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico
Dignani M.C.:
Departamento de Enfermedades Infecciosas, Institución de Diagnósticoy, Tratamiento de Pacientes Oncohematológicos, Buenos Aires, Argentina
Hevia A.I.:
Departamento de Micología, INEI ANLIS Dr. Carlos G. Malbrán, Buenos Aires, Argentina
Abrantes R.A.:
Departamento de Micología, INEI ANLIS Dr. Carlos G. Malbrán, Buenos Aires, Argentina
Davel G.:
Departamento de Micología, INEI ANLIS Dr. Carlos G. Malbrán, Buenos Aires, Argentina
Canteros C.:
Departamento de Micología, INEI ANLIS Dr. Carlos G. Malbrán, Buenos Aires, Argentina
Acosta-Altamirano G.:
División de Investigación, Hospital Juárez de México, MEX, D.F., Mexico
Reyes-Montes, MD:
Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico
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