1) Determine adequacy of passive transfer, and specifically Mannheimia hemolytica antibodies, in 2 subsets of neonatal calves.
2) Characterize presence and relative levels of respiratory pathogens – and changes over time – in nasal swabs in 2 cohorts of calves.
3) Use the results to determine whether changes in vaccine programs are warranted in this herd.
South Dakota State University
Copyright © 2020 the Authors
Daly, Russ; Rozeboom, Christian; and Sumption, Jonathan, "Assessing Passive Transfer and Respiratory Pathogen Colonization of Neonatal Beef Calves in a Confinement Operation" (2020). SDSU Beef Day 2020 Summary Publication. 16.