What contributes to Failure of Passive Transfer (FPT)?
- Feeding colostrum with inadequate levels of IgG
- Feeding insufficient volumes of colostrum
- Feeding colostrum too late after birth
- Bacteria contaminating colostrum at harvest, during storage or at feeding
Numerous factors influence the IgG content of colostrum, such as:
- An insufficient quantity of colostrum
- Inferior quality of colostrum, ie colostrum collected from cows after the first 24 hours post birth
- Poor maternal instincts
- Suckling drive of the newborn
Why can feeding enough high-quality colostrum be a challenge?
- Time and staffing constraints during calving, kidding or lambing can mean that newborn animals don’t get enough colostrum in the first hours after birth.
- Maternal colostrum quality (IgG, fat and protein concentrations and volumes) are often variable and poor.
In a 2015 study by Dairy NZ, only 10 percent of 298 maternal colostrum samples collected at multiple times during the calving season had immunoglobulin concentrations over the recommended levels and only 11 percent of samples had acceptable (low) bacterial contamination levels³.
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