The core treatment protocol for ovine footrot combines careful claw trimming, footbathing with zinc sulphate, and isolation or culling of non-responders, with complete elimination of virulent Dichelobacter nodosus achievable in 6–19 weeks. The Veterinary…
Claw trimming is the essential first step before any topical treatment. Loose and severely overgrown horn must be carefully removed prior to footbathing or spray application; trimming without causing bleeding is the recommended technique. Veterinary Micr…+1 Trimming instruments are a significant transmission vector — knives, hands, and removed horn material all test positive for viable D. nodosus after use, so wiping the knife with a disinfection towel and wearing and changing gloves after every sheep is required to prevent iatrogenic spread. Veterinary Micr…
Footbathing with 10% zinc sulphate is the primary flock-level treatment. The established protocol is weekly stand-in footbaths for 10 minutes per sheep. The Veterinary… This regimen achieved 100% elimination of virulent D. nodosus (aprV2) across all 28 treated flocks, with time to elimination ranging from 6 to 19 weeks depending on within-flock prevalence at the start of treatment. The Veterinary… Weekly walkthrough zinc sulphate footbathing restricts footrot prevalence to 2% (97% effective) compared with 76% in untreated animals; footbathing every 3 weeks with a 1-hour stand-in Footrite® protocol achieves 6.5% prevalence (91% effective), which is significantly less effective than weekly bathing. Australian Vete… Glutaraldehyde-based footbaths (2% Digicur) are ineffective at reducing D. nodosus load when applied as a one-off or weekly footbath and are not recommended as a primary treatment. Veterinary Micr…
An antibiotic-free hoof spray (Intra Repiderma) is a validated alternative to footbathing, particularly for small flocks where footbathing is logistically impractical. The protocol begins with claw trimming at the first visit, followed by spray application three times within the first week, then continued until all sheep in the flock test PCR-negative for virulent D. nodosus — a process requiring 1–10 weeks. Veterinary Micr… Visible clinical improvement is evident after one week of treatment, and complete elimination of virulent D. nodosus is achievable with this protocol. Veterinary Micr…
Systemic macrolide treatment is a third validated elimination strategy. Flocks that achieved PCR-negative status through whole-flock systemic macrolide treatment were equivalent to footbathing-based protocols in eliminating virulent D. nodosus, confirmed by risk-based pooled PCR sampling. BMC Veterinary… Macrolides concentrate in skin and inflamed tissue, maintain therapeutic concentrations in the hoof, and have a half-life of 5.25 days with no known side effects in sheep. BMC Veterinary…
Non-responders must be isolated or culled. Sheep that fail to clear infection despite treatment sustain within-flock transmission and prevent flock-level elimination. The Veterinary… Reintroduction of virulent D. nodosus via purchased animals — particularly rams — is the primary risk to a successfully treated flock. BMC Veterinary…
Treatment endpoint is confirmed by competitive real-time PCR of interdigital swab samples, not clinical scoring alone. PCR detects clinically healthy subclinical carriers that visual examination misses, making it the required tool for confirming elimination and for ongoing surveillance. The Veterinary…+2 Risk-based pooled samples (pools of four or five feet) are as sensitive as individual undiluted samples for detecting D. nodosus and are the recommended cost-effective approach for flock-level testing. The Veterinary…+1
Biosecurity after successful treatment is mandatory to maintain footrot-free status. Measures include quarantine of all incoming animals with PCR testing before flock contact, regular pasture rotation, spatial separation of treatment areas, and avoidance of contact with animals from markets or shows — where virulent D. nodosus prevalence has been recorded as high as 100% in regions without active control programs. Veterinary Micr…+1
| Treatment | Protocol | Efficacy | Key Caveat |
|---|---|---|---|
| 10% zinc sulphate footbath (weekly) | 10 min stand-in, weekly | 97% effective; 100% flock elimination in 6–19 weeks The Veterinary…+1 | Time to elimination correlates with initial within-flock prevalence The Veterinary… |
| 10% zinc sulphate footbath (every 3 weeks) | 1-hour stand-in, every 3 weeks | 91% effective Australian Vete… | Significantly less effective than weekly protocol Australian Vete… |
| Intra Repiderma spray | 3× in first week after trimming, continued until PCR-negative | Complete elimination of virulent D. nodosus; clinical improvement at 1 week Veterinary Micr… | Requires strict adherence; 1–10 weeks to PCR-negative Veterinary Micr… |
| Whole-flock systemic macrolide | Single flock treatment | Equivalent PCR-negative outcome to footbathing protocols BMC Veterinary… | Half-life 5.25 days; no specific dose cited in sources |
| 2% glutaraldehyde (Digicur) footbath | Weekly | Ineffective at reducing D. nodosus load Veterinary Micr… | Not recommended as primary treatment Veterinary Micr… |
Would you like to go over the vaccination protocols and where they fit alongside footbathing in a flock control program?