Affiliation:
1. Department of Microbiology, Swedish University of Agricultural Sciences (SLU),1 and
2. Feed Laboratory, National Veterinary Institute,2 SE-750 07 Uppsala, Sweden
Abstract
ABSTRACT
The
Penicillium roqueforti
group has recently been split into three species,
P. roqueforti
,
Penicillium carneum
, and
Penicillium paneum
, on the basis of differences in ribosomal DNA sequences and secondary metabolite profiles. We reevaluated the taxonomic identity of 52 livestock feed isolates from Sweden, previously identified by morphology as
P. roqueforti
, by comparing the sequences of the ribosomal internal transcribed spacer region. Identities were confirmed with random amplified polymorphic DNA analysis and secondary metabolite profiles. Of these isolates, 48 were
P. roqueforti
, 2 were
P. paneum
, and 2 were
Penicillium expansum
. No
P. carneum
isolates were found. The three species produce different mycotoxins, but no obvious relationship between mold and animal disease was detected, based on medical records.
P. roqueforti
appears to dominate in silage, but the ecological and toxicological importance of
P. carneum
and
P. paneum
as feed spoilage fungi is not clear. This is the first report of
P. expansum
in silage.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
72 articles.
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