Abstract
Immunoglobulin G1 (IgG1) serum concentrations are used to evaluate passive transfer of immunity in neonatal calves. Total serum proteins also can be measured to evaluate calf health. If IgG1 and total serum protein concentrations change with age, it becomes imperative to compare samples only from a narrow time period. Otherwise, differences might be due to age and not immune status. To help define this time period, blood was drawn from 10 beef calves when they were 1, 5, and 10 days of age. Serum samples were analyzed for IgG1 and total protein concentrations. Total protein concentrations decreased from days 1 to 5 (P<.05) or days 1 to 10 (P<.05), but not from days 5 to 10 (P=.46). IgG1 concentrations declined from days 1 to 10 (P<.05), but values from days 1 to 5 were similar (P=.17). Thus, it is important to collect serum on day 1 to guarantee correct results when evaluating IgG1 and total proteins collectively. However, if IgG1 alone is evaluated, serum can be collected between days 1 and 5.
Highlights
Serum Immunoglobulin G1 (IgG1) concentration is a good indicator of passive immunity transfer in beef cattle
If IgG1 and total serum protein concentrations change with age, it becomes imperative to compare samples only from a narrow time period
Differences might be due to age and not immune status
Summary
Immunoglobulin G1 (IgG1) serum concentrations are used to evaluate passive transfer of immunity in neonatal calves. If IgG1 and total serum protein concentrations change with age, it becomes imperative to compare samples only from a narrow time period. Differences might be due to age and not immune status. To help define this time period, blood was drawn from 10 beef calves when they were 1, 5, and 10 days of age. Serum samples were analyzed for IgG1 and total protein concentrations. It is important to collect serum on day 1 to guarantee correct results when evaluating IgG1 and total proteins collectively. If IgG1 alone is evaluated, serum can be collected between days 1 and 5
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Kansas Agricultural Experiment Station Research Reports
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
