Age at which dairy cattle become Mycobacterium avium subsp. paratuberculosis faecal culture positive

Weber, M.F.; Kogut, J.; Bree, J. de; Schaik, G. van; Nielen, M.

doi:10.1016/j.prevetmed.2010.07.004

Cited by 35 publications

(29 citation statements)

References 20 publications

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“…Moreover, based on previously conducted observations, we know that the probability of infection is much higher in herds where clinical cases of Johne's disease occur regularly compared to herds where only subclinical cases are observed. In addition, more frequent shedding was observed in herds with high prevalence compared to herds with low prevalence (36).…”

Section: Resultsmentioning

confidence: 87%

“…He also noticed the fact that calves inoculated with a large MAP dose (5 × 10 9 ) demonstrated MAP shedding more often than calves inoculated with a low MAP dose (5 × 10 7 ), and this correlation disappeared when animals older than 6 months were infected. Moreover, in experimental models, it was shown that calves inoculated with a high dose of MAP at a younger age (below the 6 th month of life), the clinical form of Johne's disease developed faster (25,36,41).…”

Section: Resultsmentioning

confidence: 99%

“…Calves born to MAP positive dams have a higher infection risk due to the possibility of in-utero transmission and due to contact with infectious faeces and uptake of infectious colostrum at parturition. (25,36). Oral inoculation of calves has generally resulted in a subclinical form of the disease and very rarely resulted in a clinical form.…”

Section: Praca Oryginalnamentioning

confidence: 99%

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Occurrence of faecal shedding of Mycobacterium avium subs. paratuberculosis by calves

Wiszniewska-Łaszczych¹,

Szteyn²,

Wysok³

et al. 2017

Medycyna Weterynaryjna

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Praca Oryginalnamentioning

confidence: 99%

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Occurrence of faecal shedding of Mycobacterium avium subs. paratuberculosis by calves

Wiszniewska-Łaszczych¹,

Szteyn²,

Wysok³

et al. 2017

Medycyna Weterynaryjna

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“…Due to the slow disease progression, the highest probability of testing positive is found in cows aging 2.5 to 4.5 and 2.5 to 5.5 years for ELISA and fecal culture, respectively [42]. However, the proportion of heifers <2 years old that started fecal shedding increases as the within-herd JD prevalence increases [43]. Nonetheless, there are still major deficits in diagnosing infected animals in vivo and many infectious animals may remain undetected.…”

Section: Diagnostic Testsmentioning

confidence: 99%

Management Practices and Their Potential Influence on Johne’s Disease Transmission on Canadian Organic Dairy Farms—A Conceptual Analysis

et al. 2014

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Johne's disease (JD) is a chronic, production-limiting disease of ruminants. Control programs aiming to minimize the effects of the disease on the dairy industry have been launched in many countries, including Canada. Those programs commonly focus on strict hygiene and management improvement, often combined with various testing methods. Concurrently, organic dairy farming has been increasing in popularity. Because organic farming promotes traditional management practices, it has been proposed that organic dairy production regulations might interfere with implementation of JD control strategies. However, it is currently unclear how organic farming would change the risk for JD control. This review presents a brief introduction to organic dairy farming in Canada, JD, and the Canadian JD control programs. Subsequently, organic practices are described and hypotheses of their effects on JD transmission are developed. Empirical research is needed, not only to OPEN ACCESS Sustainability 2014, 6 8238 provide scientific evidence for organic producers, but also for smaller conventional farms employing organic-like management practices.

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“…In this period, infected animals can shed MAP via faeces into the environment (Sweeney 1996;Weber et al 2010). Some animals progress to the clinical phase, typically at an age between 3 and 5 years, by developing a protein-losing enteropathy, characterized by intermittent/chronic diarrhoea, severe weight loss and submandibular oedema (Sweeney 1996).…”

Section: Diseasementioning

confidence: 99%

Bovine paratuberculosis: recent advances in vaccine development

Santema

Rutten

Koets

2011

Veterinary Quarterly

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Bovine paratuberculosis is a highly prevalent chronic infection of the small intestine in cattle, caused by Mycobacterium avium subspecies paratuberculosis. Current control strategies based on test-and-cull and biosecurity measures do not suffice in lowering the prevalence of paratuberculosis in an adequate manner. Therefore, control programmes are in need of an effective vaccine, but at the moment no vaccine is registered for use in cattle in the European Union. This review provides a brief overview of the microbiology, epidemiology and immunology of bovine paratuberculosis, and focuses on recent advances in the development of vaccines against paratuberculosis.

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Age at which dairy cattle become Mycobacterium avium subsp. paratuberculosis faecal culture positive

Cited by 35 publications

References 20 publications

Occurrence of faecal shedding of Mycobacterium avium subs. paratuberculosis by calves

Occurrence of faecal shedding of Mycobacterium avium subs. paratuberculosis by calves

Management Practices and Their Potential Influence on Johne’s Disease Transmission on Canadian Organic Dairy Farms—A Conceptual Analysis

Bovine paratuberculosis: recent advances in vaccine development

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