Table 2. Association of pVir plasmid with clinical symptoms in patients with Campylobacter jejuni gastroenteritis, Alberta, Canada, 1999–2002.

pVir	Clinical symptom (%)
	Pain	Diarrhea	Vomiting	Blood in stool	Fever	Hospitalization	Duration <7 days (%)
Present (n = 18)*	83 (n = 18)	100 (n = 18)	28 (n = 15)	53† (n = 17)	59 (n = 17)	22 (n = 18)	77 (n = 14)
Absent (n = 86)	80 (n = 72)	99 (n = 85)	30 (n = 73)	21 (n = 76)	64 (n = 64)	17 (n = 86)	82 (n = 68)

*Samples sizes (n) for each clinical symptom differ as symptoms were not known for each patient.
†p<0.05, presence vs. absence of pVir.