Book of Abstracts (PDF) - International Mycological Association

IMC7 Wednesday August 14th Lectures
denticulate setae. Two species of Hymenochaete and
Hydnochaete olivacea can be added to the monotypic
genus Pseudochaete. H. villosa is different from the other
Hymenochaete species and belongs to a clade together with
Coltricia and Coltriciella. As a rule, a clade ought to be
named a genus only when there are morphological
characters making the species group recognizable without
molecular analysis. Within Hymenochaete s.str., such
groups are lacking. Avoidance of schizotaxia (splitting) is
advisable irrespective of the use of morphological or
mainly molecular characters.
216 - Building ecology: Influence of distribution,
detection and control of biodeterioration
J. Mattsson
Mycoteam AS, P.O. Box 5 Blindern, 0313 Oslo, Norway. -
E-mail: johan@mycoteam.no
Under normal circumstances do mould and wood-decaying
fungi not have favourably condition for growth in
buildings, mainly due to restricted access of water.
However, it might occur local areas in constructions where
the physical conditions are favourable enough for
microbiological activity. Understanding the building
ecology with respect to influence of distribution and
activity of different fungi, gives possibilities for a
successful detection, evaluation and control of the
damages. By laboratory and field experiments, it has been
proven what physical conditions that are necessary for
fungal activity in buildings. The main factors for growth
are humidity, temperature and the time of exposure. Other
aspects might also have impact, but often to less extent.
Due to the great variations of microclimate in a
construction, it can be a significant change of the building
ecology in few millimetres. This variation often leads to
difficulties in the work of building survey. Since the
damage development might be caused by small variations
in building ecology, the detection and understanding of the
physical conditions are important in order to control if
remediation has desired effect. Subsequently, the risk of
failure in handling damages caused by mould fungi is high
- often with a significant impact on the indoor air quality.
Guidelines for accomplishing building survey are needed in
order to give a better understanding of the building ecology
and thereby ensure an optimal result.
217 - Studies on the dry rot fungus, Serpula lacrymans
J.W. Palfreyman 1* , J.S. Gartland 1 , N.A. White 1 , J. Bech-
Andersen 2 & D.E.L. Cooke 3
1 School of Contemporary Science, University of Abertay
Dundee, Bell Street, Dundee, Scotland, U.K. - 2 Hussvamp
Laboratories AB, Copenhagen, Denmark. - 3 Mycology,
Bacteriology and Nematology Unit, SCRI, Invergowrie,
Dundee, Scotland, U.K. - E-mail: mltjwp@tay.ac.uk
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Book of Abstracts
Molecular and morphological parameters of Serpula
lacrymans isolates from various sites in the built
environment in Europe and Australia were compared to
similar parameters of 'wild' isolates from India, the Sumava
Mountains (Czech Republic) and Mount Shasta (U.S.A.).
The Indian, Czech Republic and all of the building isolates
bar one showed identity in both molecular and
morphological features. The Australian and the U.S.
isolates (BF-050 and USA'94 respectively) showed specific
morphological differences and could be separated on the
basis of RAPD-PCR with the U.S. isolate being least
closely related to the S. lacrymans type strain of FPRL12C.
ITS sequence data revealed 2 base differences between
FPRL12C and BF-050 in the 673 sequenced, 9 differences
between FPRL12C and USA'94 and 16 differences
between USA'94 and the closely related organism Serpula
himantioides. The possible evolutionary relationships
between the various isolates are discussed along with
suggestions for the origin of S. lacrymans as a scourge of
the built environment in many temperate areas of the
world. We will also report on the use of Indian, US and
Czech Republic Isolates of Trichoderma in the biocontrol
of decay by S. lacrymans.
218 - Moulds in Buildings 1998-2002
S. Gravesen
Danish Urban & Research Institute, box119, 2970
Hørsholm, Denmark. - E-mail: sug@sbi.dk
Results of a multidisciplinary research programme:
"Moulds in buildings, 1998 - 2002" are presented. The
purpose of the programme was to gain more knowledge
concerning conditions for mould growth in buildings and
the ensuing health effects on people. Furthermore the aim
was to create basic knowledge about safe and cost efficient
solutions for solving problems and for preventing mould
growth in buildings during planning, operation,
maintenance and renovation. - A clear correlation was
demonstrated to exist between the level of moulds in floor
dust and a number of irritative symptoms from eyes and
upper airways including the general symptoms such as
headaches, dizziness and difficulties in concentration. - The
correlation between exposure to moulds from floor dust nd
symptoms was typically stronger among pupils with
asthma and hay fever. This condition was especially
pronounced for irritation of the mucous membranes of the
eyes. - Experiments have shown that wood and wood-based
materials; wallpaper and materials with glue (starch) have
the lowest resistance to mould infestation. - Plaster and
concrete, which have a very modest content of organic
material, can be infested with mould growth, provided that
the materials have a high humidity (water activity)
preferably 95% RH. *Danish Moulds in Buildings-
Consortium.