Dairy cow mastitis challenge model for non-lactating holstein cows

Overview

The Dairy Cow Mastitis Challenge Model is designed to investigate mastitis in non-lactating Holstein cows by introducing controlled bacterial challenges. This model focuses on understanding the disease's progression and identifying optimal bacterial doses for inducing mastitis. By studying clinical symptoms and pathological changes in mammary tissues, the research aims to provide insights into mastitis management and treatment in dairy cows.

Technical specifications

• Selection of Subjects: 45 three-year-old Holstein cows in good health during their dry period.
• Trial Design: Cows are divided into control and experimental groups exposed to different doses of Escherichia coli and Staphylococcus aureus.
• Bacterial Doses: Bacteria are diluted to concentrations of 10⁴, 10⁵, and 10⁶ CFU/ml and injected into the teat canal.
• Data Collection: Clinical symptoms are observed, and mammary tissues are collected for pathological evaluation.
• Advanced Analysis: RNA extraction for qPCR analysis to measure mRNA transcription levels of chemokines, complement factors, and other relevant markers.

Technology readiness level

This model is at Technology Readiness Level 5, indicating that it has been validated in a relevant environment with controlled experimental conditions. Further validation is planned to refine the model and its applications in mastitis research.