Control of Salmonella spp. in Birds in 2015
Authors: Dimitrova, A., Savova-Lalkovska, T.
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For the control of Salmonella spp. a total of 571 samples from birds were tested in 2015. The samples (fresh feces and shoe pads - 303 pcs.; dust and socks - 244 pcs. and internal organs and feces of exotic birds - 24 pcs.) originating from 56 poultry sites, were classified in 4 categories: breeding flocks - 11 pcs.; laying hens - 26 pcs.; broiler chickens - 18 pcs. and exotic birds - 1. The diagnostic materials were tested according to BDS EN/ISO 6579, Amendment 1: Annex D.
Of all the 56 sites tested (100%), 6 (10.71%) were positive for Salmonella spp.: breeding flocks - 1.78%; laying hens - 7.15%; broiler chickens - 0.0%, and exotic birds - 1.78%. Salmonella spp.-positive sites were distributed by category as follows: breeding flocks - 9.09%; laying hens - 15.38; broiler chickens - 0.0%, and exotic birds - 100%.
Of the 571 samples studied (100%), the 12 samples (2.1%) found positive for Salmonella spp. included: breeding flocks - 0.35%; laying hens - 1.58%; broiler chickens - 0.0%, and exotic birds - 0.17%. The Salmonella spp.-positive samples were distributed by category as follows: breeding flocks - 1.52%; laying hens - 3.93%; broiler chickens - 0.0%, and exotic birds - 4.17%.
Five Salmonella serovars were typified distributed as follows: Enteritidis - 25% Infantis - 25%; Corvallis - 25%, Typhimurium - 16,67 % and Thompson-8,33%.
In 2015, the most common confirmed human pathogenic serovars of Salmonella were: Typhimurium, isolated from laying hens and parrots, and Enteritidis from laying hens.
The tendency to isolate S. Infantis and S. Corvallis from breeding flocks and laying hens remained unchanged.. In 2015, Salmonella spp. was not isolated in the broiler chickens category in contrast to 2014, when S. Infantis was found in 0.8% of the samples.