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Journal of Clinical Microbiology, 12 1995, 3183-3185, Vol 33, No. 12
R Szewzyk, SB Svenson, SE Hoffner, G Bolske, H Wahlstrom, L Englund, A Engvall and G Kallenius
Forty-nine isolates of Mycobacterium bovis from humans and animals in
Sweden were analyzed by restriction fragment length polymorphism (RFLP)
patterns probed by the insertion element IS6110. Most isolates had patterns
indicating the presence of only one or two genomic copies of the IS6110
insertion element. This simple type of pattern was found in all human
isolates. In contrast, isolates from M. bovis infections in five herds of
farmed deer in Sweden showed a specific RFLP pattern with seven bands,
indicating seven copies of the IS6110 sequence. In 1958, Sweden was
declared free from M. bovis in cattle. However, in 1987, M. bovis was
reintroduced with imported farmed deer, and since 1991, 11 outbreaks in
deer herds, but not in other livestock or wildlife, have been diagnosed.
Continued RFLP studies of the new Swedish M. bovis isolates can reveal
possible transmission of this deer strain to other animals or humans.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Molecular epidemiological studies of Mycobacterium bovis infections in humans and animals in Sweden
Department of Bacteriology, Swedish Institute for Infectious Disease Control, Stockholm, Sweden.
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