Recuperación de Cryptococcus neoformans y C. gattii ambientales y su asociación con aislados clínicos en Cúcuta, Colombia

  1. Asbleide Angarita-Sánchez
  2. Denny Cárdenas-Sierra
  3. Claudia Parra-Giraldo
  4. Claudia Diaz-Carvajal
  5. Patricia Escandon-Hernandez
Journal:
Revista MVZ Córdoba

ISSN: 1909-0544,  0122-0268

Year of publication: 2019

Volume: 24

Issue: 1

Pages: 7137-7144

Type: Article

DOI: 10.21897/RMVZ.1258 DIALNET GOOGLE SCHOLAR lock_openDialnet editor

More publications in: Revista MVZ Córdoba

Abstract

ABSTRACT Objective. Isolate, identify and molecularly characterize pathogenic Cryptococcus isolates for humans from environmental and clinical samples from the city of Cúcuta. Materials and methods. A total of 1300 samples were collected from 446 trees of 10 different species in 10 public areas of Cúcuta. Concomitantly, clinical isolates of Cryptococcus neoformans were obtained (June 2016-June 2017). The samples were cultivated in Guizottia abysinica seed medium and were then biochemically identified and characterized by PCR fingerpinting and RFLP of the URA5 gene. Results. C. neoformans displayed an environmental prevalence of 4.3% (19 positive individuals), and that of C. gattii was 0.2% (1 positive individual); this yielded a total of 20 Cryptococcus-positive trees and 21 isolates (two from the same individual). Santander Park registered 47.6% of the global prevalence (10/21 isolates), followed by La Victoria Park with 23.8% (5/21 isolates), corresponding to C. neoformans. One C. gattii isolate was collected from a Ficus benjamina tree located in Mercedes Ábrego Park. Genotypic analysis revealed the presence of C. neoformans var. grubii VNI in 85.7% of environmental isolates as well as 100% of clinical isolates. VNII and VGII molecular types represented 9.5% and 4.8% of the environmental isolates, respectively. Conclusions. The longitudinal sampling of previously reported environmental niches of the fungus reveals its presence and suggests that permanent monitoring is required both in the environment and in patients, especially in endemic areas of the city.

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