Prevention of Salmonella contamination of finished soybean meal used for animal feed by a Norwegian production plant despite frequent Salmonella contamination of raw soy beans, 1994–2012

Acta Veterinaria Scandinavica

Martin Wierup¹  Thor Kristoffersen² 

[1] Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, SE-75007, Sweden

[2] Denofa AS, Øraveien 2, N-1630 Gamle, Fredrikstad, Norway

关键词: Compound animal feed;    Animal feed material;    Pre harvest control;    Food safety;    Animal feed control;    Soybean meal;    Crushing plant;    Soy bean;    Salmonella;   

Others  :  1082584
DOI  :  10.1186/s13028-014-0041-7

 received in 2014-03-25, accepted in 2014-06-16,  发布年份 2014

【 摘 要 】

Background

Salmonella contaminated animal feed is a major source for introducing Salmonella into the animal derived food chain. Because soybeans frequently are contaminated with Salmonella, soybean meal used as animal feed material, a by-product of a “crushing plant” which produces oil from soybeans, can be important source of Salmonella in the animal feed.

We report the successful control of Salmonella from 1994 to 2012 in a Norwegian crushing plant producing soybean meal from imported soy beans. The results are based on an officially supervised HACCP based program including annual testing of around 4000 samples.

Results

During the 19-year period, 34% of samples collected during unloading of ships delivering soybeans yielded Salmonella; the proportion of samples from ships that yielded Salmonella varied from 12-62% each year. Dust samples from all shiploads from South America yielded Salmonella. In total 94 serovars of Salmonella were isolated, including nine (90%) of the EU 2012 top ten serovars isolated from clinical cases of salmonellosis in humans, including major animal pathogenic serovars like Spp. Typhimurium and Enteritidis.

The effectiveness of the HACCP based control was indicated by a low prevalence of Salmonella contamination in the clean area of the plant, which is considered to be the main reason for the successful prevention of Salmonella in the end product. Despite extensive testing, no sample from the finished soybean meal product was found to be Salmonella contaminated.

Conclusions

This study shows that a HAACP-based control program in a soybean crushing plant can produce Salmonella free soybean meal despite frequent Salmonella contamination of raw soybeans. That approach is suggested as an effective way to minimize the risk of Salmonella exposure of the animal feed mills and contamination of the subsequent animal feed chain.

【 授权许可】

   
2014 Wierup and Kristoffersen; licensee Springer

【 图 表 】

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