Temporal Study of <i>Salmonella enterica</i> Serovars Isolated from Environmental Samples from Ontario Poultry Breeder Flocks between 2009 and 2018.

enterica prevalence was identified in broiler breeders (from 27.8% in 2009 to 22.1% in 2018) and layer breeders (from 15.4% to 4.9%), while an increasing trend was identified in turkey breeders (from 12.0% to 24.5%).

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Overall, there was a decreasing trend in the submission-level prevalence during the study period (from 15.4% in 2009 to 4.9% in 2018) ( Figure 1 ).

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