1.
Bergqvist, Åsa, et al.
(författare)
Smittspridning av campylobacter inom fjäderfäslakteri
1986
Ingår i: XV Nordiska veterinärkongressen – 15th Nordic Veterinary Congress, Stockholm 28/7–1/8 1986. - Stockholm : Sveriges Veterinärförbund. - 9178106435 ; , s. 355-358
Konferensbidrag (refereegranskat)
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3.
Berndtson, Eva, et al.
(författare)
Incidence of campylobacter on a broiler farm
1987
Ingår i: The IVth International Workshop on Campylobacter Infections, Department of Clinical Bacteriology, University Göteborg, June 16–18, 1987, Göteborg, Sweden. ; , s. Abstract no. 17-
Konferensbidrag (refereegranskat)
4.
Broman, T., et al.
(författare)
Campylobacter jejuni in black-headed gulls (Larus ridibundus) : prevalence, genotypes, and influence on C. jejuni epidemiology
2002
Ingår i: Journal of Clinical Microbiology. - 0095-1137 .- 1098-660X. ; 40:12, s. 4594-4602
Tidskriftsartikel (refereegranskat) abstract
Campylobacteriosis is a zoonotic disease in which birds have been suggested to play an important role as a reservoir. We investigated the prevalence of Campylobacter jejuni subsp. jejuni in black-headed gulls (Larus ridibundus) in southern Sweden with the aim of examining the nature of C. jejuni infection in this bird species. Birds were sampled in four sampling series each year during 1999 (n = 419) and 2000 (n = 365). Longitudinally sampled C. jejuni isolates from individual gulls were subjected to macrorestriction profiling (MRP) by pulsed-field gel electrophoresis to investigate the genotypical stability during the natural course of infection. Furthermore, a subset (n = 76) of black-headed gull isolates was compared to isolates from broiler chickens (n = 38) and humans (n = 56) originating from the same geographic area. We found a pronounced seasonal variation in C. jejuni carriage, with the highest rates found in late autumn. MRP similarities were higher between isolates of human and broiler chicken origin, than between those of wild bird origin and either of the other two hosts. However, identical MRPs were found in two gull isolates and one human isolate after digestion with two restriction enzymes, strongly indicating that they may have been colonized by the same clone of C. jejuni. The MRPs most prevalent in gull isolates did not occur among isolates from humans and broiler chickens, suggesting the existence of a subpopulation of C. jejuni adapted to species-specific colonization or environmental survival.
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7.
Eld, Karin, et al.
(författare)
Comparison of a cold enrichment method and the IDF method for isolation of Listeria monocytogenes from autopsy material
1993
Ingår i: Veterinary Microbiology. - : Elsevier. - 0378-1135 .- 1873-2542. ; 36:1-2, s. 185-189
Tidskriftsartikel (refereegranskat) abstract
The method most often used in Sweden for isolation of Listeria monocytogenes from animal autopsy material is a cold enrichment method. This method is very slow. The International Dairy Federation (IDF) has recently presented a method for detection of L. monocytogenes in milk and milk products that is complete in one week. During a two year period 69 specimens from dead animals with suspected listeriosis were examined for L. monocytogenes in parallel analyses with both the cold enrichment method and the IDF method. Samples derived from different autopsy material representing a variety of animals. L. monocytogenes was isolated in 27.5% of the samples with the IDF method but only in 4.3% with the cold enrichment method. It is concluded that the IDF method was more sensitive than the cold enrichment method.
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9.
Ericsson, Henrik, et al.
(författare)
Subtyping of a frequent phagovar of Listeria monocytogenes in Sweden by use of restriction endonuclease analysis
1993
Ingår i: APMIS. - : John Wiley & Sons. - 0903-465X .- 1600-5503 .- 0903-4641 .- 1600-0463. ; 101:7-12, s. 971-974
Tidskriftsartikel (refereegranskat) abstract
In Sweden, many Listeria monocytogenes strains belonging to serovar 4b and isolated during the last five years from different sources share the same phagovar - 2389:2425:3274:2671:47:108:340. The object of the present study was to investigate if 31 L. monocytogenes serovar 4b strains belonging to this particular phagovar could be differentiated by use of a simple restriction endonuclease analysis (REA). Among the enzymes tested, Xho I was found to be the most useful, since this enzyme could divide the 31 strains into five groups. The profiles of all human clinical isolates were indistinguishable from each other, which indicates that these strains may represent a single clone. The food isolates and the strains of human origin did not share the same profile. This further characterization may be of epidemiological importance as this phagovar of L. monocytogenes has been associated with at least two outbreaks of human listeriosis in Europe.
10.
