Non-Sporulating |
These are organisms that have not sporulated under the culture conditions provided. Most never sporulate in culture (sterile mycelia). Some represent non-sporulating colonies of common fungi (e.g., Cladosporium, Alternaria, even Aspergillus). | |
| Distribution | Where Found | Mode of Dissemination |
| Ubiquitous. | See "Other Comments."/span> | See "Other Comments." |
| Allergen | Potential Opportunist or Pathogen | Potential Toxin Production |
| See "Other comments." | Not applicable. | Not applicable. |
| Growth Indoors | Industrial Uses | Other Comments |
| Growth on a variety of substrates. Identification is not possible without sporulation. | Not applicable. | Potentially, all fungi are capable of producing a non-sporulating state. |
| Characteristics: Growth/Culture | Notes on Spore Trap Recognition | Notes on Tape Lift Recognition |
| Many fungi do not adapt well to routine mycologic media and growth conditions and therefore, may not sporulate. Specialized media, light-dark cycles, UV light, and low or high temperatures may be required to stimulate sporulation. Unless distinctive spore types are formed, identification may not be possible. Frequently non-sporulating colonies are produced by basidiomycetes (mushrooms) which usually do not produce fruiting structures on lab media. They may produce clamp connections and/or arthroconidia within their mycelia. | Hyphal fragments are not routinely counted or reported. If numbers are excessive a comment indicating high numbers of hyphal fragments will appear on the report. | Non-sporulating mycelia may appear as colorless or pigmented (brown), septate (with cross-walls) or non-septate. Further identification requires sporulation. |
| Definitions | References | Commentary | ||