Pithomyces sp

Mitosporic fungus. Hyphomycetes. Teleomorph (sexual state): Leptosphaerulina (Ascomycete).

Characteristics

Distribution

Ubiquitous;
cosmopolitan.
Approx. 15 species.

Where Found

Common on dead leaves of more than 50 different plants, especially leaf fodders. Soil, grasses.

Mode of Dissemination

Dry spore.
Wind.

Growth Indoors

Rarely found growing indoors.
Can grow on paper.

Industrial Uses

Not known.

Other Comments

Pithomyces chartarum is one of the causes of facial eczema in sheep in New Zealand.

Potential Health Effects

Allergens

Not studied.

Potential Opportunist or Pathogen

No reports of infections.

Potential Toxin Production

Sporidesmin.

Laboratory Notes

Growth/Culture Characteristics

Grows readily on general fungal media; sporulation may be slow, and may require a "light/dark cycle." Colonies are shades of tan to brown.

Spore Trap Recognition

Distinctive multicelled, brown conidia of Pithomyces chartarum are recognizable on spore trap slides. Other species are common but more difficult.

Tape Lift Recognition

Distinctive.
Rarely found on tape lifts.