Spread of avian pathogenic Escherichia coli ST117 O78:H4 in Nordic broiler production

BMC Genomics

Table 1 Virulence gene content among 114 E. coli isolates

	Group 1	Group 2	Group 3	Group 4	Group 5	Group 6	Healthy	Diseased
Isolates	47	8	5	4	3	3	15	99
Farms	34	8	4	4	2	3	15	73
Serotype	O78:H4	O53:H4	O103:H2	O18ac:H7	O149:H23	O5:H10	-	-
ST	117	117	1146	95	1163	93	-	-
fimA	+	+	+	+	+	1/3	12/15	94/99
fimC	+	+	+	+	+	+	13/15	96/99
papC								4/99
tsh				+		+		20/99
fyuA		+		3/4			1/15	28/99
iroD	+	+		+	+	+	4/15	94/99
iroN	+	+		+	+	+	3/15	93/99
irp2		+		+			1/15	30/99
iucA	+	+	+	+		+	7/15	84/99
iucD	+	+	+	+		1/3	7/15	84/99
cva		+	+	+	+	+	12/15	39/99
cvi		+	+	+	+	+	12/15	39/99
iss	+	+	2/5	+	+	+	7/15	97/99
ompA	+	+	+	+	+	+	15/15	99/99
vat	+	+		+				71/99
hlyA
ibeA				+		1/3		13/99

The table shows the virulence gene content among E coli groups of identical ST and serotype. “+” indicates presence of genes. If a virulence gene was not present among all isolates in a group, the ratio of isolates that carried the gene is presented. The number of isolates and the number of different farms they were collected from, in each group is shown. The isolates from these groups were also closely related according to the SNP analysis, and the groups are highlighted in colors in Fig. 1. Furthermore, the ratios of isolates from healthy and diseased poultry that carried virulence genes are shown

ISSN: 1471-2164