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[Host-pathogen relations in yeasts].

B R Gedek1

  • 1Sachverständige für Mikroökologie und Mykotoxinologie, Germany.

Mycoses
|December 1, 2000
PubMed
Summary

Yeast pathogenicity in warmblooded hosts depends on more than just multiplication and resistance. Key factors include morphological changes, adherence, microbial competition, and genes for immune evasion and parasitic survival, notably seen in Cryptococcus neoformans and Candida species.

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Area of Science:

  • Mycology
  • Pathogen Discovery
  • Host-Microbe Interactions

Context:

  • Understanding yeast colonization in warmblooded hosts (humans and animals) is crucial.
  • Yeasts can exist as symbionts, commensals, or pathogens.
  • Factors determining pathogenicity are complex and multifactorial.

Purpose:

  • To elucidate the specific requirements for yeasts to develop pathogenicity in mammalian hosts.
  • To differentiate between mere colonization and true pathogenic potential.

Summary:

  • Yeast pathogenicity is not solely dependent on multiplication capacity or environmental resistance.
  • Key determinants include structural-morphological adaptability, adherence, microbial competition, and genetic factors.
  • Genes enabling host immune response down-regulation and parasitic enzyme production are critical.
  • Cryptococcus neoformans and certain Candida species exemplify yeasts with these pathogenic traits.

Impact:

  • Provides a framework for identifying and understanding pathogenic yeasts.
  • Informs strategies for preventing and treating yeast infections.
  • Highlights the genetic basis of fungal virulence.

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