Table 4.

Association of Mannheimia haemolytica qPCR Ct values with those from Mycoplasma bovis, Histophilus somni, Pasteurella multocida, and BRSV.

BRD pathogen	Mean difference in Mh qPCR Ct values	95% CI	P -value
Mb	0.08	(0.02, 0.13)	0.01
Hs	−0.02	(−0.09, 0.05)	0.536
Pm	0.01	(−0.06, 0.08)	0.739
BRSV	0.03	(−0.05, 0.12)	0.429

Mh, Mannheimia haemolytica; Mb, Mycoplasma bovis Ct value; Hs, Histophilus somni Ct value; Pm, Pasteurella multocida Ct value; BRSV, Bovine respiratory syncytial virus Ct value. 95% CI, 95% confidence interval. The mean difference in Mannheimia haemolytica Ct values was adjusted for the vaccination group and days post-arrival.