Serum protein levels in pigs from birth to maturity and in young pigs with and without enteric colibacillosis

The changes with age in serum protein concentrations of 29 normal pigs from 3 litters were estimated. Adult serum protein concentrations were reached by 21–24 weeks of age. Significant litter to litter dif-. ferences in protein concentrations were found in the various age groups. Serum protein concentrations were determined in 327 pigs at 2 days and 3 weeks of age with and without E. coli associated diarrhoea. The gamma globulin concentrations were normally distributed in the 2-day-old pigs and there was no apparent correlation between serum gamma globulin concentrations and incidence of E. coli associated diarrhoea.