The putative adrenergic sensor kinase QseC does not significantly influence intestinal colonisation of pigs. 6-week-old pigs were inoculated with 1.50 × 10⁹ CFU ST4/74 nal^R (n = 5) or 1.53 × 10⁹ CFU ST4/74 nal^R ΔqseC (n = 6) and the course of faecal excretion of the bacteria followed daily for 16 days. Values shown are the least square means (LSM) ± standard error (SE) of the LSM. † denotes p values ≤ 0.1.