English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Bovine respiratory disease is the leading cause of morbidity and mortality in weaned calves. In Argent ina, two weaning practices have been implemented. In the early weaning, the calf is removed from the cow at 60-70 days of age while in ultra-early weaning the calf is weaned at 30-45 days of age. The purposes o f both systems is to improve cow body condition, calf performance, conception rates and forage availabil ity for the cow. In this study we evaluated the antibod y response against BVDV and BoHV1 in early and ultraearly weaned calves that had received a conventiona l vaccination schedule (first dose at weaning and a booster 21 days post-weaning). Passively acquired i mmunity may provide protection against disease caused by these viruses. The presence of antibodies agains t BRSV, a virus that was not present in the vaccine s used, was also evaluated as an indirect indicator o f viral circulation in the herd. At the time of vac cination, calves presented a wide range of maternally-derived antibody titers. Vaccination against BoHV-1 did no t evoke seroconvertion and antibody titers continued to decay throughout the experience. After vaccinati on, seroconversion to BVDV could be detected in calves with low antibody titers, while higher antibody tit ers exerted an inhibitory effect of the active humoral response.

american journal of animal and veterinary sciences

DETECTION OF ANTIBODIES AGAINST BOVINE HERPES VIRUS 1, BOVINE VIRAL DIARRHEA VIRUS AND BOVINE RESPIRATORY SYNCYTIAL VIRUS IN EARLY AND ULTRA-EARLY WEANED BEEF CALVES