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Journal of Clinical Microbiology, April 2001, p. 1294-1298, Vol. 39, No. 4
Department of Infectious Diseases and Medical
Microbiology, Lund University, Lund,1 and
Department of Microbiology, Umeå University,
Umeå,2 Sweden
Received 16 August 2000/Returned for modification 11 November
2000/Accepted 11 January 2001
Southern Sweden is an area of Lyme borreliosis (LB) endemicity,
with an incidence of 69 cases per 100,000 inhabitants. The most
frequent clinical manifestations are erythema migrans (77%) and
neuroborreliosis (16%). There was no record of human
Borrelia strains being isolated from patients in this
region before the prospective study reported here. Borrelia
spirochetes were isolated from skin and cerebrospinal fluid (CSF) from
LB patients living in the region. A total of 39 strains were
characterized by OspA serotype analysis, species-specific PCR, and
signature nucleotide analysis of the 16S rRNA gene. Of 33 skin
isolates, 31 (93.9%) were Borrelia afzelii strains and 2 (6.1%) were Borrelia garinii strains. Of six CSF isolates,
five (83.3%) were B. garinii and one (16.7%) was
B. afzelii. Neither Borrelia burgdorferi
sensu stricto strains nor multiple infections were observed. The
B. afzelii isolates were of OspA serotype 2. Three
B. garinii strains were of OspA serotype 5, and the remaining four strains were of OspA serotype 6. All of the
B. garinii strains belonged to the same 16S
ribosomal DNA ribotype class. Our findings agree with earlier findings
from other geographic regions in Europe where B. afzelii and B. garinii have been recovered
predominately from skin and CSF cultures, respectively. To further
study the possible presence in Sweden of the genotype B. burgdorferi sensu stricto, which is known to be present in Europe
and to occur predominately in patients with Lyme arthritis, molecular
detection of Borrelia-specific DNA in synovial samples from
Lyme arthritis patients should be performed.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.4.1294-1298.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Characterization of Lyme Borreliosis Isolates from
Patients with Erythema Migrans and Neuroborreliosis in Southern
Sweden
*
Corresponding author. Mailing address: Department of
Microbiology, Umeå University, S-901 87 Umeå, Sweden. Phone:
46-(0)90-7856726. Fax: 46-(0)90-772630. E-mail:
sven.bergstrom{at}micro.umu.se.
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