A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ochroconis sp.: Comprise a very small proportion
of the fungal biota. This genus is most closely
related to Dactylaria and Scolecobasidium. Opinions
differ regarding the taxonomy of these three genera
and are considered by many to be synonyms. All
three genera are listed in Ainsworth & Bisby’s
Dictionary of the Fungi as legitimate genera.
There have been several reports of opportunistic
infections caused by these genera but a true pathogenic
role had not been firmly establishes. No information
is available regarding upper respiratory health
effects, or toxicity. Allergenicity has not been
studied. May be identified on surfaces by tape
lifts, tease mounts from bulk samples, and in
air by culturable (Andersen) samples. Certain
species of Ochroconis have somewhat distinctive
spores, which could be counted on spore trap samples
if the presence of this genus has already been
demonstrated (for example, on tape lifts). Natural
habitat includes soil and decaying leaves.
Oedocephalum sp.: Comprise a small proportion
of the fungal biota. This genus is related to
Gonatobotrys and possibly to Amblyosporium. No
information is available regarding health effects
or toxicity. Allergenicityhas not been studied.
May be identified on surfaces by tape lifts, tease
mounts from bulk samples, and in air by culturable
(Andersen) and spore trap samples. Spores have
distinctive morphology. Reported isolations include
soil and waste compost. It speculates on initial
isolation but forms only sterile mycelia on subsequent
transfer.
Oidiodendron sp.: Common but comprise a small
proportion of the fungal biota. This genus is
most closely related to Geomyces and Arthrographis.
Oidiodendron cerealis is quite distinct from other
Odiodendron species and is placed in a separate
genus Stephanosporium by some taxonomists. As
to health effects, one isolation from a case of
neurodermitis nuchae in 1969 exists for Odiodendron
cerealis/Stephanosporium cereale, with no reports
for other Odiodendron species. No information
is available regarding toxicity. Allergenicity
has not been studied. May be identified on surfaces
by tape lifts, tease mounts from bulk samples,
and in air by culturable (Andersen) sampling.
Stephanosporium has distinctive spores and can
also be recognized on spore trap samples. Spores
of other Odiodendron species are arthrospores
without distinctive morphology and would be recognized
as such on spore trap samples. Natural habitat
includes soil, litter, wood, and bark. Stephanosporium
cereale has been isolated from air, paper, soil,
and textiles.
Opportunistic Pathogen: Causes infection only
when the weak or injured condition of the person
gives the agent opportunity to infect. Rarely
infect patients who are otherwise healthy.
Other colorless: all non-distinctive unidentifiable
colorless spores seen on spore trap samples are
placed into this category. These are all the genera
described by the sentence: “Spores do not
have distinctive morphology and would be categorized
as “other colorless” on spore trap samples.
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