Contagious Digital Dermatitis: Welfare and Herd Management

Digital dermatitis (DD) is now the most common cause of lameness in dairy cattle worldwide. This guide covers welfare and evidence-based control.

Key Facts

Digital dermatitis is caused by complex mixed bacterial infections involving Treponema species
Characteristic painful ulcerative lesions develop at the skin-hoof junction
Affected cows show severe lameness causing significant welfare compromise
The bacteria spread rapidly between cattle in wet housing conditions
Individual lesion treatment with tetracycline is effective when applied promptly
Footbathing programmes reduce bacterial load and prevent spread at herd level

Welfare Considerations and Management

Welfare-centred DD management requires a systematic herd-level approach combining individual treatment and preventive footbathing. Lesion scoring using the M-score system guides treatment decisions. Early-stage lesions (M0-M1) respond to footbathing; active lesions (M2) require individual bandaged tetracycline treatment. Chronic lesions (M4) are more resistant. Footbathing with copper sulphate or formalin solutions reduces bacterial transmission. Housing hygiene, stocking density, and track management reduce environmental contamination.

What You Can Do

Implement routine lesion scoring to identify and treat DD early
Apply individual bandaged tetracycline treatment to all active M2 lesions
Establish regular footbathing programmes using appropriate disinfectant solutions
Manage housing hygiene, tracks, and passages to reduce mud and faecal contamination