Modelling the transmission dynamics of bovine digital dermatitis in New Zealand pastoral dairy production systems

Yang, D.A.; Laven, Richard; Müller, Kerstin; Gates, M. Carolyn

doi:10.1186/s13567-020-00750-8

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…These figures are greatly lower than the reported DD prevalence in the present study. Pasture-based dairy herds have been frequently reported to be at lower risk of developing DD [ 38 ] which could explain the variation in the prevalence estimates. Studies performed on free-stall dairy herds reported much higher cow-level (20.5–66.4%), herd-level (96.1–97%) and within-herd (0–74.3%) prevalence of DD [ 39 – 41 ] than the present study.…”

Section: Discussionmentioning

confidence: 99%

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

2023

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Background Lameness is a significant problem for the dairy industry worldwide. No previous studies have evaluated the prevalence of lameness or digital dermatitis (DD) in dairy cattle herds in Egypt. A total of 16,098 dairy cows from 55 dairy herds in 11 Egyptian governorates underwent visual locomotion scoring using a 4-point scoring system. Cows that had a lameness score ≥ 2 were considered clinically lame. Following manure removal with water and using a flashlight, the cows’ hind feet were examined in the milking parlour to identify DD lesions and classify with M-score. Furthermore, each cow was assigned a hock score (a 3-point scale) and a hygiene score (a 4-point scale). The cow-, within-and between-herd prevalence of lameness and DD and associated 95% confidence intervals (CI) were calculated. The prevalence of hock lesions and poor cow hygiene was also calculated. Results Of the examined cows, 6,883 were found to be clinically lame (42.8%, 95% CI = 42.0–43.5%). The average within-herd prevalence of lameness was 43.1% (95% CI = 35.9–50.3%). None of the dairy herds recruited into the study were found to be free from clinical lameness. The average within-herd prevalence of DD was 6.4% (95% CI = 4.9–8.0%). The herd-level prevalence of DD was 92.7% (95% CI = 85.9–99.6%). Active DD lesions (M1, M2, M4.1) were identified in 464 cows (2.9%) while inactive lesions (M3, M4) were identified in 559 cows (3.5%). The within-herd prevalence of hock lesions (score 2 or 3) was 12.6% (95% CI = 4.03–21.1%) while a severe hock lesion had within-herd prevalence of 0.31% (95% CI = 0.12–0.51%). Cow-level prevalence of hock lesions was 6.2% (n = 847, 95% CI = 5.8–6.2%). The majority of examined cows had a hygiene score of 4 (n = 10,814, prevalence = 70.3%, 95% CI = 69.5–71%). Conclusions The prevalence of lameness was higher than prevalence estimates reported for other countries which could be due to differing management and/or environmental factors. DD was identified at lower prevalence in most herds but with high herd-level prevalence. Poor cow hygiene was notable in most herds. Measures to reduce the prevalence of lameness and to improve cow hygiene in dairy cattle herds in Egypt are therefore needed.

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Section: Discussionmentioning

confidence: 99%

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

2023

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“…These gures are greatly lower than the reported DD prevalence in the present study. Pasture-based dairy herds have been frequently reported to be at lower risk of developing DD (42) which could explain the variation in the prevalence estimates. Studies performed on free-stall dairy herds reported much higher cow-level (20.5-66.4%), herd-level (96.1-97%) and within-herd (0-74.3%) prevalence of DD (43)(44)(45).…”

Section: Discussionmentioning

confidence: 99%

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

Salem

Mesalam

Monir

2022

Preprint

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Background lameness is a significant problem of the dairy industry worldwide. No previous studies have evaluated the prevalence of lameness or digital dermatitis (DD) in dairy cattle herds in Egypt. A total of 16,098 dairy cows from 55 dairy herds in 11 Egyptian Governorates underwent visual locomotion scoring using a 4-point scoring system. Cows that had a lameness score ≥ 2 were considered clinically lame. Following manure removal with water and using a flashlight, the cows’ hid feet were examined in the milking parlour to identify and M-score DD lesions. Furthermore, each cow was assigned a hock score (a 3-point scale) and a hygiene score (a 4-point scale). The cow-level, within-and between-herd prevalence of lameness and digital dermatitis and associated 95% confidence intervals (CI) were calculated. The prevalence of hock lesions and poor cow hygiene was also calculated. Results Of the examined cows, 6,883 cows were found to be clinical lame (42.8%, 95% CI = 42–43.5%). The average within-herd prevalence of lameness was 43.1% (95% CI = 35.9–50.3%). None of the dairy herds recruited into the study was found to be free from clinical lameness. The average within-herd prevalence of DD was 6.4% (95% CI = 4.9–8%). The herd-level prevalence of DD was 92.7% (95% CI = 85.9–99.6%). Active DD lesions (M1, M2, M4.1) were identified in 464 cows (2.9%) while inactive lesions (M3, M4) were identified in 559 cows (3.5%). The within-herd prevalence of hock lesions (score 2 or 3) was 12.6% (95% CI = 4.03–21.1%) while a severe hock lesion had within-herd prevalence of 0.31% (95% CI = 0.12–0.51%). Cow-level prevalence of hock lesions was 6.2% (n = 847, 95% CI = 5.8–6.2%). Majority of examined cows had a hygiene score 4 (n = 10,814, prevalence = 70.3%, 95% CI = 69.5–71%). Conclusions The prevalence of lameness was higher than reported prevalence estimates in other countries which could be due to differing management and/or environmental factors. DD was identified at lower prevalence in most herds. Poor cow hygiene was notable in most herds. There should be measures to reduce the prevalence of lameness and to improve cow hygiene in dairy cattle herds in Egypt.

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“…As podopatias são dinâmicas, evoluem ao longo do tempo, como comprovam estudos clínicos de tempo de recuperação com o tratamento e recorrência de animais afetados (Berry et al, 2012;Yang et al, 2020). A perícia veterinária deve considerar o tempo como uma variável nas avaliações do bemestar e suas relações com a dor e sofrimento de animais.…”

Section: Introductionunclassified

Dynamics of the welfare of dairy cattle affected by podopathies as support for veterinary expertise

Amaral¹,

Ambrósio²

2022

Pubvet

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A perícia de bem-estar de bovino leiteiro é uma demanda inovadora e relevante na investigação legal e forense. Em particular, devido à necessidade de tratamento e prevenção das doenças da produção, entre elas as podopatias. Os pareceres técnicos veterinários podem constatar a negligência, imperícia e imprudência dos responsáveis pelos cuidados da saúde animal e subsidiar a tomada de decisão judicial, quando cabível, em casos de maus-tratos, crueldade e abuso em bovinos. O entendimento da complexidade das podopatias causadas por múltiplos fatores com interações não lineares com o bem-estar requer abordagem dinâmica. A metodologia de Dinâmica de Sistemas foi usada para construir o modelo conceitual dos problemas das podopatias e das relações de causa e efeito dos construtos baseados nos conhecimentos e experiências dos pesquisadores e na literatura. O modelo contém seis diagramas com ciclos de reforço e de balanço e os respectivos padrões de referências das variáveis estados. As hipóteses dinâmicas realçaram o papel da perícia veterinária ao considerar a inter-relação de reforço entre podopatias e bem-estar que direciona o sistema para círculos virtuosos ou viciosos. Foi detalhado como as podopatias causam dor e sofrimento reforçando ainda mais a perda de bem-estar. A ação do médico veterinário, motivada por questões éticas, legais ou sociais, ao promover a prevenção e tratamento gera retroalimentações de balanço que podem elevar o bem-estar para o nível desejado. Os ciclos de balanço da prevenção possuem demoras nos efeitos das ações sobre a incidência de podopatias, com consequente continuidade, durante algum tempo, da dor e sofrimento dos animais. Do modelo emergiu a sinergia contraintuitiva entre aplicação de recursos financeiros para a produção e investimentos para assegurar o bem-estar. Assim, promover os ciclos de balanço da saúde, diminuindo as podopatias e melhorando o bem-estar animal, influenciará positivamente os ciclos de reforço da economia. A perícia por meio de retroalimentação negativa baseada nos valores técnicos, legais, éticos e humanitários controla as podopatias e influencia na adoção de ações de melhoria do bem-estar. Concluiu-se que o modelo conceitual é um framework para auxiliar a modelagem computacional e contribui para a compreensão da complexidade das podopatias em questões legais e forenses. Ações humanas influenciam a dinâmica das podopatias comprometendo o bem-estar podendo gerar provas de maus-tratos em bovinos leiteiros.

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Modelling the transmission dynamics of bovine digital dermatitis in New Zealand pastoral dairy production systems

Cited by 7 publications

References 34 publications

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

A cross-sectional study of the prevalence of lameness and digital dermatitis in dairy cattle herds in Egypt

Dynamics of the welfare of dairy cattle affected by podopathies as support for veterinary expertise

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