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Table 2 Description of layer flocks with outbreaks of acute erysipelas

From: Quantification of IgY to Erysipelothrix rhusiopathiae in serum from Swedish laying hens

Farm Flock sample ID Housing system Age at sampling (weeks) Number of samples Classification of outbreak ER isolatea Comment
A A.1 Organic 77 30 Clade 3 Samples collected during an acute outbreak.
A A.2 Organic 55 29 ns Samples collected during an acute outbreak in flock subsequent (1 year later) to flock A.1.
B B.1 Organic 75 31 Clade 3 Samples collected from surviving hens 6 months after an acute outbreak.
B B.2 Organic 55 29 Clade 3 Samples collected during an acute outbreak in a flock subsequent (1 year later) to flock B.1.
C C Organic 72 31 ns Samples collected during an acute outbreak.
D D Free-range 90 30 Clade 2 Samples collected during an acute outbreak.
E E Organic 50 30 ns Samples collected during an acute outbreak.
F F.1 Organic 66 27 ns Samples collected during an acute outbreak.
F F.2 Organic 67 30 nt Samples collected 1 week after F.1 in the same flock.
G G Free-range 78 30 Intermediate Samples collected during an acute outbreak.
  1. ns not sequenced
  2. nt not tested
  3. aSome of the ER isolates collected from outbreaks were whole genome sequenced within another project and assigned to clades according to whole-genome SNP comparison with isolates from the study by Forde et al. [21]. These data were however not available to us at the time of ER antibody analysis