Udder Health Status of First Parity Dairy Cows in Early-Lactation Based on Somatic Cell Count Categories

The main aim of this study was to investigate the prevalence intramammary infection (IMI) in early-lactation primiparous cows using milk recording cow composite somatic cell count (CSCC) categories (combining first 2 results after calving). Another evaluate urea (MU) content as a potential supplementary indicator SCC or CSCC for identification IMI calving. This retrospective observational conducted on records test-day over period 6 years (January 2016 December 2021. data 158 Holstein Friesian cows, with their 5 35 days calving and second 28 56 (DIM), were identified. Each assigned category (low-low, low-high, high-low high-high) based at milking recordings following cut-offs: ≤150,000 cells/ml (low), >150,000 (high). association between MV analyzed correlation models. At recording, proportion 63.29% low category, rest (36.71%) high category. 59.49%, 3.80%, 27.85% 8.86% low-low, high-high, respectively. 12.66% 87.34% indicating poor good udder health, MU positive moderate (+0.49) negative strong (-0.97), contents inconclusive. We concluded that may be useful tool identifying success problems regarding health early lactation.