This material was presented on November 11, 2010 as part of DAIReXNET's "Managing Somatic Cell Counts" webinar.

1. Mastitis:
A Reaction of the Immune System
RJ Erskine
Michigan State University

2. Mastitis

4. Intramammary Infections
•Infectious microbes
• Primarily bacteria
–Mycotic, algae
•Teat end exposure,
invasion

5. Infection induces inflammation
•Heat
•Pain
•Swelling
•Edema
•Leukocytosis
Somatic Cell Counts

6. Inflammation:
Cytokines

10. Phagocytes in the mammary gland
• Low numbers (< 100 X of blood)
• Target fat, protein
• • Lactose …Not glucose (no energy)
• Lower antibodies, opsonins
Fat
Protein
S. aureus

11. Primary Mammary Immunity

13. Hyperkeratosis

15. Clean, Dry, Comfortable Cows

16. Never forget, this is about food