Table 5.

Proportion of blood samples seronegative or nasal swabs positive results to BRD viruses in animals that survived (n = 121) or died from BRD (n = 16) and associated odds ratios^1,2

BRD viral status	Survived	Died	Odds ratio	95% CI	P-value
Seronegative at feedlot entry
BHV1	97.4 ± 0.01	100.0 ± 0.00	>999.99	(<0.001 to )	0.977
BVDV	57.8 ± 0.05	84.6 ± 0.10	4.02	(0.840 to 19.256)	0.081
BRSV	19.8 ± 0.04	15.4 ± 0.10	0.74	(0.150 to 3.603)	0.702
BPI3	27.6 ± 0.04	38.5 ± 0.14	1.64	(0.494 to 5.451)	0.416
BAdV	35.3 ± 0.04	53.9 ± 0.138	2.13	(0.665 to 6.849)	0.201
Seronegative at first BRD pull
BHV1	62.5 ± 0.04	75.0 ± 0.11	1.80	(0.541 to 5.984)	0.335
BVDV	38.3 ± 0.04	62.5 ± 0.12	2.68	(0.904 to 7.949)	0.075
BRSV	8.3 ± 0.03	18.8 ± 0.10	2.54	(0.610 to 10.558)	0.198
BPI3	11.7 ± 0.03	25.0 ± 0.11	2.52	(0.707 to 9.013)	0.153
BAdV	14.2 ± 0.03	25.0 ± 0.11	2.02	(0.576 to 7.076)	0.270
Seronegative feedlot entry and first BRD pull
BHV1	63.8 ± 0.05	76.9 ± 0.12	1.89	(0.487 to 7.353)	0.355
BVDV	37.1 ± 0.05	76.9 ± 0.12	5.66	(1.457 to 21.983)	0.013
BRSV	3.5 ± 0.02	7.7 ± 0.07	2.33	(0.236 to 23.101)	0.466
BPI3	10.3 ± 0.03	30.8 ± 0.13	3.85	(1.015 to 14.614)	0.048
BAdV	10.3 ± 0.03	15.4 ± 0.10	1.58	(0.307 to 8.094)	0.583
Positive nasal swab
BHV1	20.7 ± 0.04	4.2 ± 0.02	2.61	(<0.001 to >999)	0.969
BVDV	3.3 ± 0.02	12.5 ± 0.08	4.18	(0.690 to 25.323)	0.119
BRSV	5.0 ± 0.02	0.003 ± 0.01	3.21	(<0.001 to >999)	0.973
BPI3	0.8 ± 0.00	0.0004 ± 0.13	2.49	(<0.001 to >999)	0.977
BCoV	1.7 ± 0.01	18.8 ± 0.10	13.73	(2.063 to 91.395)	0.007

¹BRD-associated viruses: bovine alphaherpesvirus-1 (BoHV-1), bovine viral diarrhea 1 (BVDV-1), bovine respiratory syncytial virus (BRSV), bovine paraInfluenza-3 (BPI3), and bovine adenovirus (BAdV) and positive or negative nasal swab results for BoHV-1, BVDV-1, BRSV, BPI3, and bovine coronavirus (BCoV).

²Values in bold were significantly different.