Dynamics of somatic cell count (SCC) and differential SCC during and following intramammary infections

Somatic cell count is frequently used as an indicator of intramammary infections (IMI) in dairy cattle worldwide. The newly introduced differential SCC (DSCC) can potentially contribute to detection IMI. purpose this study was investigate the dynamics and DSCC after We a data set with monthly samples from 2 Danish herds through 1 yr, using bacterial culture identify regard IMI were assessed at quarter level following new each 3 defined pathogen groups, major, minor, or “other” pathogens, general additive models. Both increased IMI, more pronounced increase if major other pathogens detected compared minor pathogens. found that both and, herd 2, caused by also estimated duration when they exceeded threshold, done separately for group. Major had longest-lasting effect DSCC. conclude magnitude response differs between causative