What question did this study set out to answer?

This study aims to investigate the association between S/P ratio of antibodies, somatic cell count, and milk yield in lactating dairy cows.

February 8, 2026Open Access

Association between milk anti- Staphylococcus aureus antibody, somatic cell count, and milk yield in lactating dairy cows

Key Points

This study aims to investigate the association between S/P ratio of antibodies, somatic cell count, and milk yield in lactating dairy cows.
Observational study design
Measurement of S/P ratio and somatic cell count
Assessment of milk yield
Comparative analysis of antibody levels based on lactation stage
Moderate agreement was found between S/P ratio and somatic cell count (SCC)
Negative associations were observed between S/P ratio and milk yield among older cows
Correlation of the S/P ratio with SCC indicates its potential as a mastitis marker

Abstract

This observational study demonstrated moderate agreement between S/P ratio and SCC. Additionally, there were negative associations between the S/P ratio and MS amongst older cows and in late lactation. Thus, the S/P ratio of an S. aureus-specific IgG ELISA is correlated with a well-defined marker of mastitis (SCC) and with milk yield depression. Further assessment of these associations using microbiology, and investigation of associations between the antibody results and long-term survival in the herd would further strengthen the validity and utility of the test.

Read Full Paperexternally

Bookmark

View Full Paper

Cite This Study

McDougall et al. (Thu,) studied this question.

synapsesocial.com/papers/698827f00fc35cd7a8846fb8 https://doi.org/https://doi.org/10.1080/00480169.2026.2614557

Bookmark

View Full Paper