Abstract
This paper presents Salmonella data from animals, feedstuffs and feed mills in Sweden between 1993 and 1997. During that period, 555 isolates were recorded from animals, representing 87 serotypes. Of those, 30 serotypes were found in animals in Sweden for the first time. The majority of all isolates from animals were S. Typhimurium (n = 91), followed by S. Dublin (n = 82). There were 115 isolates from cattle, 21 from broilers, 56 from layers and 18 from swine. The majority of these isolates were from outbreaks, although some were isolated at the surveillance at slaughterhouses. The number of isolates from the feed industry was similar to that of the previous 5-year period. Most of those findings were from dust and scrapings from feed mills, in accordance with the HACCP programme in the feed control programme. It can be concluded that the occurrence of Salmonella in animals and in the feed production in Sweden remained favourable during 1993–97.
Highlights
Salmonellosis is one of the most common food borne zoonoses reported world-wide (Gomez et al 1997, Thorns 2000)
At least one isolate from each finding of Salmonella in animals, feed or environmental sampling from feed mills has to be sent to the National Veterinary Institute (SVA) for confirmation and serotyping
The results presented in this study were based on information collected at the SVA and the Swedish Board of Agriculture (SBA)
Summary
Salmonellosis is one of the most common food borne zoonoses reported world-wide (Gomez et al 1997, Thorns 2000). In Sweden the prevalence of Salmonella in food producing animals is low 2001, Thorberg & Engvall 2001) This is most likely due to the Salmonella control programme that started in 1961 with the aim to keep meatand egg producing animals free from Salmonella. At least one isolate from each finding of Salmonella in animals, feed or environmental sampling from feed mills has to be sent to the National Veterinary Institute (SVA) for confirmation and serotyping. This is performed according to the methods described by Kaufmann (1972). In January 1996, the phage typing system was changed from the Lilleengen to the Colindale system (Anderson et al 1977, Ward et al 1987)
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