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Rusts

Fungal group. Uredinales. Basidiomycetes.
Distribution Where Found Mode of Dissemination
Ubiquitous;
cosmopolitan.
Approx. 14 families, 105 genera and 5,000 species.
Grasses, flowers, trees and other living plant materials. Rusts have both wet and dry spores. Wind disperses the urediospores, teliospores, basidiospores, and aeciospores. The basidiospores and aeciospores have an active spore release mechanism.
Allergen Potential Opportunist or Pathogen Potential Toxin Production
Type I allergies (hay fever, asthma). No reports of human infection. Not known.
Growth Indoors Industrial Uses Other Comments
Rusts do not grow indoors unless their host plants are present. They are parasitic plant pathogens and need a living host for growth. Not known. Rusts are members of the Basidiomycetes class. They have a complex life cycle, producing five different spore types in two different plant hosts. Spore types include: basidiospores, pycniospores, aeciospores, urediospores, and teliospores.
Characteristics: Growth/Culture Notes on Spore Trap Recognition Notes on Tape Lift Recognition
Rusts do not grow on ordinary laboratory media. They require a living host plant for growth. Rust urediospores and teliospores are airborne; they are distinctive and readily identifiable on spore trap slides. Urediospores and teliospores are distinctive and readily identifiable on tape lifts. They may be found in dust as part of the normal influx of outdoor microbial particles.
Definitions | References | Commentary