Table 1. Phylogenetic groups of the APEC suspect isolates.

ChuA	yjaA	TSPE4.C2	Phylogroup assignment	Frequency n = 56 (100%)
-	+/-	-	A	25 (44.6)
-	-	+	B1	8 (14.3)
+	+	+/-	B2	1 (1.8)
+	-	+/-	D	22 (39.3)

(+) Presence of gene; (-) Absence of gene