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Applied and Environmental Microbiology, May 2000, p. 2066-2070, Vol. 66, No. 5
Department of Microbiology, The University of
Western Australia,1 and Division of
Microbiology and Infectious Diseases,2 Western
Australian Centre for Pathology and Medical Research, Queen Elizabeth
II Medical Centre, Nedlands, Western Australia 6009, Australia
Received 29 November 1999/Accepted 6 March 2000
For many years, Erysipelothrix rhusiopathiae has been
known to be the causative agent of the occupationally related infection erysipeloid. A survey of the distribution of Erysipelothrix
spp. in 19 Australasian seafoods was conducted, and methodologies for the detection of Erysipelothrix spp. were evaluated.
Twenty-one Erysipelothrix spp. were isolated from 52 seafood parts. Primary isolation of Erysipelothrix spp. was
most efficiently achieved with brain heart infusion broth enrichment
followed by subculture onto a selective brain heart infusion agar
containing kanamycin, neomycin, and vancomycin after 48 h of
incubation. Selective tryptic soy broth, with 48 h of incubation,
was the best culture method for the detection of
Erysipelothrix spp. with PCR. PCR detection was 50% more
sensitive than culture. E. rhusiopathiae was isolated from
a variety of different fish, cephalopods, and crustaceans, including a
Western rock lobster (Panulirus cygnus). There was no
significant correlation between the origin of the seafoods tested and
the distribution of E. rhusiopathiae. An organism
indistinguishable from Erysipelothrix tonsillarum was
isolated for the first time from an Australian oyster and a silver
bream. Overall, Erysipelothrix spp. were widely distributed
in Australasian seafoods, illustrating the potential for
erysipeloid-like infections in fishermen.
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Comparison of Methods for Detection of
Erysipelothrix spp. and Their Distribution in Some
Australasian Seafoods
*
Corresponding author. Mailing address: Department of
Microbiology, The University of Western Australia, The Queen Elizabeth II Medical Centre, Nedlands, Western Australia 6009, Australia. Phone:
61 8 9346 1986. Fax: 61 8 9346 2912. E-mail:
silvana{at}cyllene.uwa.edu.au.
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