| respiratory tract disease and mucosal colonization by pasteurella haemolytica in transported cattle. | to follow incidence of pasteurella haemolytica (ph) in the upper respiratory tract of healthy calves at the farm and through the marketing process, and to determine the effect of vaccination on ph colonization of the upper respiratory tract and on the incidence of respiratory tract disease (rtd). | 1996 | 8874726 |
| effects of vaccination prior to transit and administration of florfenicol at time of arrival in a feedlot on the health of transported calves and detection of mannheimia haemolytica in nasal secretions. | to determine effects of vaccination prior to transit and prophylactic administration of florfenicol at time of arrival at a feedyard on health of cattle and colonization of the nasopharynx by mannheimia haemolytica (mh). | 2002 | 11843126 |
| bovine viral diarrhea virus (bvdv) 1b: predominant bvdv subtype in calves with respiratory disease. | the prevalence of bovine viral diarrhea virus (bvdv) infections was determined in 2 groups of stocker calves with acute respiratory disease. both studies used calves assembled after purchase from auction markets by an order buyer and transported to feedyards, where they were held for approximately 30 d. in 1 study, the calves were mixed with fresh ranch calves from a single ranch. during the studies, at day 0 and at weekly intervals, blood was collected for viral antibody testing and virus isola ... | 2002 | 12146890 |