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Table 2 Summary of sample collection and testing performed

From: Longitudinal study of humoral immunity to bovine coronavirus, virus shedding, and treatment for bovine respiratory disease in pre-weaned beef calves

Collection time Samples collected Number sampled Testing
Birth Blood Subseta, n = 169 n = 169
Maternal anti-BCV IgG
Initial vaccination Blood, NSb All study calvesc n = 60 each herd, 180 total
Blood: anti-BCV IgG
NS: subclinical virus shedding
Preconditioning Blood, NS All study calves n = 60 each herd, 180 total
Blood: anti-BCV IgG
NS: subclinical virus shedding
Weaning Blood, NS All study calves n = 60 each herd, 180 total
Blood: anti-BCV IgG
NS: subclinical virus shedding
At time of treatment for BRD Blood, NS n = 234
(including mass treatments)
Blood: anti-BCV IgG
NS: detection of viral and bacterial pathogens
  1. aBlood was collected between 18 and 48 h after birth from a small subset of calves for which both birth and the first nursing episode were observed to ensure chance for colostrum uptake
  2. bNS, nasal swabs
  3. c817 calves were sampled for this study, see Table 1