A review of footrot in sheep: New approaches for control of virulent footrot

Raadsma, Herman W.; Dhungyel, Om P.

doi:10.1016/j.livsci.2013.06.011

Cited by 26 publications

(20 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of a monovalent vaccine to eliminate D. nodosus infection, as occurred in mob 5 with stain C, is consistent with recent reports of successful elimination of D. nodosus using monovalent and bivalent vaccines…”

Section: Discussionsupporting

confidence: 86%

Relationship between the likelihood of footrot elimination from a flock and the virulence of the strain of Dichelobacter nodosus present

Allworth

Egerton

2018

Aust Veterinary J

View full text Add to dashboard Cite

Objective To assess ability to eliminate different strains of footrot in sheep using inspection and culling of affected sheep. Methods A flock of 1417 Polwarth sheep that had deliberately been infected with seven different strains of Dichelobacter nodosus and undergone different control measures prior to eradication, including zinc sulfate footbathing and vaccination, were subjected to visual foot inspection on a number of occasions. Sheep identified as infected or having any foot abnormalities were removed from the flock at each inspection. The experiment had three replicates and a small number of untreated control animals. Sheep were examined following the inspections to assess the effectiveness of elimination and additional measures were implemented in two of the three replicates in an attempt to eliminate all strains of D. nodosus. Results Three strains of D. nodosus were apparently successfully eliminated from all replicates (strains A, E and H). Strains B and C were detected in one replicate each, despite additional inspections. The three stains that were eliminated were the more virulent strains and the two strains that remained were the least virulent. No assessment could be made on a further two strains. Conclusions The application of a rigorous inspection and culling program resulted in the elimination of the more virulent D. nodosus strains, but did not result in the elimination of all D. nodosus strains on all occasions.

show abstract

Section: Discussionsupporting

confidence: 86%

Relationship between the likelihood of footrot elimination from a flock and the virulence of the strain of Dichelobacter nodosus present

Allworth

Egerton

2018

Aust Veterinary J

View full text Add to dashboard Cite

show abstract

“…Breed differences in susceptibility to footrot, as expressed by the severity of lesions, have been discussed and differences between bloodlines of Merino sheep in susceptibility to footrot have been demonstrated . The possibility of interactions between breed (or strain) of sheep and strain of D. nodosus has not been discussed, although research suggests differences in heritability of response to vaccination to different antigens of D. nodosus .…”

Section: Discussionmentioning

confidence: 99%

Artificial infection of sheep with multiple strains ofDichelobacter nodosusto induce footrot

Allworth

Egerton

2017

Aust Veterinary J

View full text Add to dashboard Cite

show abstract

“…There is undoubtedly a role for better awareness of its diagnosis, prevention and control strategies, but efficient management can be problematic even on wellmanaged farms. Footrot resistance is heritable (heritability 0.15 to 0.25; Raadsma and Dhungyel, 2013) and is associated favourably with number of lambs reared and unfavourably with lamb liveweight gain. Simple 5-point scoring methods exist and are being used in some countries to provide phenotypic data on affected hooves for use in sheep breeding programmes to reduce footrot prevalence (Raadsma and Conington, 2010).…”

Section: Lamb Survivalmentioning

confidence: 99%