Exploring associations between the teat apex metagenome and Staphylococcus aureus intramammary infections in primiparous cows under organic directives

C. J. Dean, F. Peña-Mosca, T. Ray, T. J. Wehri, K. Sharpe, A. M. Antunes, E. Doster, L. Fernandes, V. F. Calles, C. Bauman, S. Godden, B. Heins, P. Pinedo, V. S. Machado, L. S. Caixeta, N. R. Noyes

Research output: Contribution to journalArticlepeer-review

Abstract

The primary objective of this study was to identify associations between the prepartum teat apex microbiome and the presence of Staphylococcus aureus intramammary infections (IMI) in primiparous cows during the first 5 weeks after calving. We performed a case-control study using shotgun metagenomics of the teat apex and culture-based milk data collected longitudinally from 710 primiparous cows on five organic dairy farms. Cases had higher odds of having S. aureus metagenomic DNA on the teat apex prior to parturition compared to controls (OR = 38.9, 95% CI: 14.84–102.21). Differential abundance analysis confirmed this association, with cases having a 23.8 higher log fold change (LFC) in the abundance of S. aureus in their samples compared to controls. Of the most prevalent microorganisms in controls, those associated with a lower risk of post-calving S. aureus IMI included Microbacterium phage Min 1 (OR = 0.37, 95% CI: 0.25–0.53), Corynebacterium efficiens (OR = 0.53, 95% CI: 0.30–0.94), Kocuria polaris (OR = 0.54, 95% CI: 0.35–0.82), Micrococcus terreus (OR = 0.64, 95% CI: 0.44–0.93), and Dietzia alimentaria (OR = 0.45, 95% CI: 0.26–0.75). Genes encoding for Microcin B17 AMPs were the most prevalent on the teat apex of cases and controls (99.7% in both groups). The predicted abundance of genes encoding for Microcin B17 was also higher in cases compared to controls (LFC 0.26).

Original languageEnglish (US)
JournalApplied and environmental microbiology
Volume90
Issue number4
DOIs
StatePublished - Apr 2024

Bibliographical note

Publisher Copyright:
© 2024 American Society for Microbiology. All rights reserved.

Keywords

  • metagenomics
  • microbial ecology
  • veterinary epidemiology

PubMed: MeSH publication types

  • Journal Article

Fingerprint

Dive into the research topics of 'Exploring associations between the teat apex metagenome and Staphylococcus aureus intramammary infections in primiparous cows under organic directives'. Together they form a unique fingerprint.

Cite this