Molecular Epidemiology of Agents of Human Chromoblastomycosis in Brazil with the Description of Two Novel Species

PLoS Negl Trop Dis. 2016 Nov 28;10(11):e0005102. doi: 10.1371/journal.pntd.0005102. eCollection 2016 Nov.

Abstract

The human mutilating disease chromoblastomycosis is caused by melanized members of the order Chaetothyriales. To assess population diversity among 123 clinical strains of agents of the disease in Brazil we applied sequencing of the rDNA internal transcribed spacer region, and partial cell division cycle and β-tubulin genes. Strains studied were limited to three clusters divided over the single family Herpotrichiellaceae known to comprise agents of the disease. A Fonsecaea cluster contained the most important agents, among which F. pedrosoi was prevalent with 80% of the total set of strains, followed by 13% for F. monophora, 3% for F. nubica, and a single isolate of F. pugnacius. Additional agents, among which two novel species, were located among members of the genus Rhinocladiella and Cyphellophora, with frequencies of 3% and 1%, respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ascomycota / classification
  • Ascomycota / genetics
  • Ascomycota / isolation & purification*
  • Brazil / epidemiology
  • Chromoblastomycosis / epidemiology
  • Chromoblastomycosis / microbiology*
  • DNA, Fungal / genetics
  • DNA, Ribosomal Spacer / genetics
  • Humans
  • Molecular Epidemiology
  • Mycological Typing Techniques
  • Phylogeny

Substances

  • DNA, Fungal
  • DNA, Ribosomal Spacer

Grants and funding

This work was supported by Brazilian government by financial support (Special Visiting Researcher Project; grant number 059/2012PVE-CAPES) from the Brazilian Federal Agency for Support and Evaluation of Graduate: Education Coordination for the Improvement of Higher Education Personnel—CAPES (www.capes.gov.br) with fellowship for RRG, GH and GSdH. The authors VAV and CGS were supported by fellowship from National Counsel of Technological and Scientific Development (http://cnpq.br/), Brasilia, Brazil. The author DPA received fellowship from Fundação Amazônia de Amparo a Estudos e Pesquisas- FAPESPA (http://www.fapespa.pa.gov.br) and CGS received financial support from CAPES /PROAMAZONIA grant number 3288/2013. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.