Global Spread of Human Chromoblastomycosis Is Driven by Recombinant Cladophialophora carrionii and Predominantly Clonal Fonsecaea Species

PLoS Negl Trop Dis. 2015 Oct 23;9(10):e0004004. doi: 10.1371/journal.pntd.0004004. eCollection 2015.

Abstract

Global distribution patterns of Cladophialophora carrionii, agent of human chromoblastomycosis in arid climates of Africa, Asia, Australia, Central-and South-America, were compared with similar data of the vicarious Fonsecaea spp., agents of the disease in tropical rain forests. Population diversities among 73 C. carrionii strains and 60 strains of three Fonsecaea species were analyzed for rDNA ITS, partial β-tubulin, and amplified fragment-length polymorphism (AFLP) fingerprints. Populations differed significantly between continents. Lowest haplotype diversity was found in South American populations, while African strains were the most diverse. Gene flow was noted between the African population and all other continents. The general pattern of Fonsecaea agents of chromoblastomycosis differed significantly from that of C. carrionii and revealed deeper divergence among three differentiated species with smaller numbers of haplotypes, indicating a longer evolutionary history.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amplified Fragment Length Polymorphism Analysis
  • Ascomycota / classification
  • Ascomycota / genetics
  • Ascomycota / isolation & purification*
  • Chromoblastomycosis / epidemiology*
  • DNA, Fungal / chemistry
  • DNA, Fungal / genetics
  • DNA, Ribosomal Spacer / chemistry
  • DNA, Ribosomal Spacer / genetics
  • Desert Climate
  • Gene Flow
  • Genetic Variation*
  • Genotype
  • Global Health
  • Haplotypes
  • Humans
  • Tropical Climate
  • Tubulin / genetics

Substances

  • DNA, Fungal
  • DNA, Ribosomal Spacer
  • Tubulin

Grants and funding

This study was supported by grants from the China National Science Fund (No.81260236), and partially by program 973 (No.2013CB531601) from China National Basic Research Program, and The Science and Technology Commission of Shanghai Municipality (No.14DZ2272900). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.