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Med. Weter. 73 (3), 176-179, 2017

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Tomasz Mituniewicz., Sara Dzik., Janina Sowińska, Anna Wójcik, Dorota Witkowska, Joanna Żebrowska, Anna Wolska, Katarzyna Milewska, Dawid Dzięgiel, Jerzy Sobczak
Occurrence of Salmonella in animal nutrition in the area monitored by the Department of Veterinary Hygiene in Olsztyn in the period 2010–2015
The objective of the research was to estimate the microbiological quality of feed and fodder components for the occurrence of Salmonella produced in the area monitored by the Department of Veterinary Hygiene in Olsztyn in the period 2010–2015. The compilation was prepared on the basis on the data of the Department of Veterinary Hygiene in Olsztyn. The research was performed according to the requirements of Polish Standard PN-EN ISO 6579. In the Warmia and Mazury Provinces in the period 2010–2015, 6 109 fodder samples were tested. 54 samples gave positive results, which accounted for 0.88%. In 2010, 1 537 samples were tested. Whereas in the years: 2011, 2012, 2013, 2014 and 2015 the number of samples tested was, consecutively: 1 187; 950; 1 304; 659 and 472. At this time, the most contaminated feed materials were rapeseed meal, which accounted for 5.81%. This feed material has had the highest degree of fodder contamination with Salmonella, and is represented as a good substrate for the development of bacteria. Afterwards, fishmeal was contaminated for 3.13% and soybean meal – 3.02%. The rarest contaminated materials for fodder production was meat and bone meal (0.28%). The results from the area monitored by the Department of Veterinary Hygiene in Olsztyn are similar to the levels of contamination reported in other years in the Warmia and Mazury. Technological advances and increasingly stringent control systems make it possible to reduce the degree of contamination of feed with Salmonella. However, it needs to be remembered that Salmonella is common in the environment. The bacteria has a high ability for survival. It is not possible for it to be completely eliminated.
Key words: Salmonella, microbiological contamination, feed, feed materials, feed components