Risk Factors for Colonization of E. coli in Atlantic Bottlenose Dolphins (Tursiops truncatus) in the Indian River Lagoon, Florida

Table 2

Distribution of E. coli positive and negative dolphins in the Indian River Lagoon, FL, by segment and year of capture with odds ratios and 95% confidence intervals.

	E. coli + n (%)	E. coli − n (%)	OR (95% CI)
Segment
4	14 (35.0)	26 (65.0)	1.00
3	2 (13.3)	13 (86.7)	0.3 (0.1, 1.4)
1C	9 (50.0)	9 (50.0)	1.8 (0.6, 5.7)
1B	2 (15.4)	11 (84.6)	0.3 (0.1, 1.7)
1A	7 (70.0)	3 (30.0)	4.3 (1.0, 19.4)
Year of capture
2003	2 (8.3)	22 (91.7)	1.00
2004	18 (62.1)	11 (37.9)	18.0 (3.5, 91.9)
2005	7 (41.2)	10 (58.8)	7.7 (1.3, 43.9)
2006	5 (29.4)	12 (70.6)	4.6 (0.8, 27.3)
2007	2 (22.2)	7 (77.8)	3.1 (0.4, 26.6)