Cattle Digital Dermatitis Prevention and Herd Welfare

Digital dermatitis (Mortellaro disease) is the most painful and prevalent lameness condition in dairy cattle worldwide, caused by spirochaete bacteria in moist, contaminated environments. Systematic footbathing, lesion treatment, and housing hygiene are the most effective control tools.

Key Facts

Digital dermatitis affects 20 to 80 per cent of dairy cattle in infected herds and is the leading cause of lameness in housed dairy systems globally
The causative spirochaetes — Treponema species — form biofilm communities that resist superficial treatment and establish chronic active lesions
Early lesion stages (M1 and M2) are highly painful, causing acute lameness; later stages (M4) may be subclinically painful but act as reservoirs for transmission
Copper sulphate or formalin footbaths at correct concentration and replenishment frequency reduce lesion prevalence by 40 to 70 per cent
Lesion treatment with tetracycline spray applied under a bandage for 48 hours achieves high cure rates for active lesions

Welfare Considerations

Cattle with active M2 digital dermatitis lesions show severe lameness, reduced lying time, weight loss, and depressed milk yield. The pain of active lesions is equivalent to that of deep foot wounds. Uncontrolled herd-wide digital dermatitis represents a massive, largely invisible welfare burden in dairy systems, where affected cows may have undetected active lesions for weeks between routine foot inspections. Welfare-centred control programmes establish regular footbathing schedules, individual cow lesion scoring and treatment at routine trimming, and housing hygiene improvements that reduce the wet, contaminated conditions that drive transmission.

What You Can Do

Implement regular footbathing at correct copper sulphate or formalin concentration and replenishment frequency as the foundation of digital dermatitis control
Train all farm staff to identify active digital dermatitis lesions at the M2 stage and apply topical antibiotic under bandage promptly
Score all four feet of every cow for digital dermatitis lesions at each routine trimming event and record findings to track herd trends
Improve housing hygiene by increasing scraping frequency, improving cubicle drainage, and reducing standing time on wet concrete
Work with your vet and foot trimmer to develop a written digital dermatitis control plan with measurable herd-level outcome targets