Final Answer:
The three major contagious pathogens for mastitis are (1) Staphylococcus aureus, (2) Streptococcus agalactiae, and (3) Mycoplasma bovis.
Step-by-step explanation:
Mastitis, the inflammation of the mammary gland, is commonly caused by bacterial infections. Among the contagious pathogens associated with mastitis, Staphylococcus aureus, a Gram-positive bacterium, is a significant contributor to both clinical and subclinical mastitis. Its ability to persist in the udder and resist treatment poses challenges for dairy farmers.
Streptococcus agalactiae, another Gram-positive bacterium, is known for its contagious nature, spreading easily from cow to cow. It has been identified as a major pathogen causing mastitis, especially in dairy herds. Effective management and control strategies are crucial to prevent the spread of Streptococcus agalactiae within a herd.
Mycoplasma bovis, a member of the Mycoplasma genus, is a unique pathogen causing contagious mastitis. It is characterized by its lack of a cell wall, making it resistant to many common antibiotics. Mycoplasma bovis can lead to chronic and persistent infections, making its control and management challenging in dairy operations.
Identifying and understanding these major contagious pathogens are essential for implementing effective mastitis control and prevention measures in dairy farming. Strategies such as proper milking hygiene, culling infected cows, and employing antibiotic treatments when necessary play critical roles in managing and minimizing the impact of these pathogens on the overall health and productivity of dairy herds.