Adrenal Function and Passive Immunity in the Dystocial Calf

Management Factors that Affect the Development of Passive Immunity in the Newborn Calf

A successful cow/calf operation requires that a large percentage of cows wean a live calf every year. A live calf at weaning time requires survival of the offspring from birth to weaning. USDA beef researchers and rancher surveys report that diseases including scours and pneumonia cause significant numbers of young calf deaths. Resistance to disease is greatly dependent on antibodies or immunog...

Passive immunity in calf diarrhea: vaccination with K99 antigen of enterotoxigenic Escherichia coli and rotavirus.

Twenty-four pregnant cows were vaccinated intramuscularly with K99 extract from enterotoxigenic Escherichia coli and inactivated rotavirus as follows: six cows were injected with 2 ml of oil-adjuvanted vaccine; six cows were injected with 0.5 ml of oil-adjuvanted vaccine; six cows were injected with 4 ml of aluminum hydroxide-adjuvanted vaccine twice with a four-week interval; and six cows were...

Enhancing Calf Immunity through Nutrition

Dairy calves are extremely susceptible to gastro-intestinal disease during the preweaned period. The risk for disease decreases as the calf ages; therefore, I think it is important to break the pre-weaned period up into at least 2 distinct phases that likely need to be managed differently, early life (1 and maybe the 2 week of life) and the remaining time the calf is fed fluid (milk or milk rep...

Immunity to Neonatal Calf Diarrhea

Enhancement of passive immunity with maternal vaccine against newborn calf diarrhea.

The effects of a maternal vaccine against newborn calf diarrhea associated with group A bovine rotavirus (BRV), bovine coronavirus (BCV), bovine parvovirus and K99 Escherichia coli (E. coli) were examined on a beef cow-calf herd. After vaccination, serum or colostrum antibody titers to BRV, BCV and E. coli K99 in the vaccinated cows were significantly higher than those in unvaccinated control c...