Salmonella control in primary poultry production in breeding flocks, laying hens and broilers for the period 2020-2022
Albena Dimitrova
, Galya Vasileva, Tanya Savova-Lalkovska
Abstract: Salmonellosis is the second most frequently reported zoonosis in the EU after campylobacteriosis. According to monitoring programs for the control of Salmonella spp. for the period 2020-2022, were tested 492 samples, of which 434 pcs. fresh feces, fabric socks, boot swabs; 13 pcs. eggshells and 45 pcs. dust samples. The samples originate from 3 categories of flocks: 45 pcs. from breeding flocks, 251 pcs. of laying hens and 196 pcs. from broilers. Diagnostic materials are tested according to ISO 6579-1:2017.
From the 492 examined samples, 18 pcs. of them were positive for Salmonella spp. (3.65%), incl. 2.22% from breeding flocks, 6.37% from laying hens and 0.51% from broilers. Their relative proportion by type of samples is: fresh feces - 83.33%, dust samples -11.11% and fabric swabs - 5.55%. For the last three years are presented data on current Salmonella serovars. The seven serovars of Salmonella were typed with the following proportion: Enteritidis – 27.8%, Infantis – 27.8%, Senftenberg – 16.7%, Bovismorbificans – 11.1%, Typhimurium – 5.5%, Corvalis – 5.5%, Stanby – 5.5%.
It is saving the trend of previous years to demonstrate the highest percentage of positive Salmonella spp. samples from the category of laying hens. The lower percentage of positive samples in the three categories of birds from the primary production is proof of the effectiveness and the need to implement the monitoring programs for Salmonella control and their importance for protecting the health of birds and people, respectively.
Keywords: breeding flocks; broilers; control; laying hens; programs; Salmonella spp.; serovar
Citation: Dimitrova, A., Vasileva, G. & Savova-Lalkovska, T. (2025). Salmonella control in primary poultry production in breeding flocks, laying hens and broilers for the period 2020-2022. Bulg. J. Agric. Sci.,31(2), 404–411.
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| Date published: 2025-04-28
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