Derfor indeholder det, foruden antistoffer overfor E. coli F5 (K99) også antistoffer over for andre organismer, som følge af vaccination af donorkøer og/ eller disses udsættelse for organismer i miljøet.
Consequently, in addition to antibodies to E. coli F5 (K99) it also contains antibodies to other organisms, as a result of vaccination and/ or exposure of the donor cows to organisms in their environment.