Digital Dermatitis in Cattle: Current Bacterial and Immunological Findings

Area of Science:

• Veterinary Medicine
• Microbiology
• Immunology

Background:

• Digital dermatitis is a major cause of lameness in dairy cattle worldwide.
• The exact cause is unknown but involves infection by multiple treponeme species and other anaerobic bacteria.

Purpose of the Study:

• To review current literature on the polybacterial nature of digital dermatitis.
• To discuss the host immune response to digital dermatitis.

Main Methods:

• Literature review of studies on digital dermatitis etiology and pathogenesis.
• Analysis of identified treponeme phylotypes and their association with lesions.
• Examination of host immune responses, including innate immunity and antibody production.

Main Results:

• Several treponeme phylotypes are associated with digital dermatitis lesions.
• Local innate immune responses may exacerbate the condition.
• Antibodies are produced, but cellular immunity remains poorly understood.

Conclusions:

• Digital dermatitis is a complex disease involving multiple bacteria.
• Further research is required to elucidate treponeme virulence factors and host-specific factors influencing digital dermatitis.
• Understanding these factors is crucial for developing effective prevention and treatment strategies.