Herd-level risk factors for infection with Mycobacterium paratuberculosis in US dairies and association between familiarity of the herd manager with the disease or prior diagnosis of the disease in that herd and use of preventive measures

Wells, Scott J.; Wagner, Bruce A.

doi:10.2460/javma.2000.216.1450

Cited by 170 publications

(138 citation statements)

References 16 publications

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“…Nevertheless, we expected to find a higher proportion of MAP-positive animals (by ELISA, as well as, by fecal culture and PCR) in the study herd, considering inappropriate herd management practices present and known to be risk factors for the disease (e.g. presence of animals born at other dairies, exposure of calves 0-6 weeks to adults feces, feces spread on forage fed to any age group (Collins et al, 1994;Goodger et al, 1996;Jakobsen et al, 2000;Wells and Wagner, 2000;Diéguez et al, 2008;Tiwari et al, 2009;Sorge et al, 2012;Künzler et al, 2014;Fernández-Silva and Ramírez-Vásquez, 2015;Vilar et al, 2015). When a test combination is considered, it must be taken into account that some infected cows produce antibodies for several years prior to the fecal-shedding of detectable quantities of MAP.…”

Section: Discussionmentioning

confidence: 99%

Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd

Correa-Valencia

Ramírez

Bülte

et al. 2017

Rev Colomb Cienc Pecu

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Section: Discussionmentioning

confidence: 99%

Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd

Correa-Valencia

Ramírez

Bülte

et al. 2017

Rev Colomb Cienc Pecu

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“…It has been demonstrated that the odds of being JD-positive is greater for larger herds than for smaller herds [30,38]. Furthermore, farms that purchase stock from other farms are more likely to be positive than farms that do not purchase stock (closed herds) [30,31].…”

Section: Etiology and Epidemiologymentioning

confidence: 99%

“…Furthermore, farms that purchase stock from other farms are more likely to be positive than farms that do not purchase stock (closed herds) [30,31].…”

Section: Etiology and Epidemiologymentioning

confidence: 99%

“…Therefore, most of the JD prevention efforts focus on calving and early calf rearing practices. Having cows calve in individual calving pens rather than group calving pens is associated with decreased odds of being a JD positive farm [30,31]. It is commonly recommended to remove the calf from the calving area as soon as possible (<12 h) after birth [32].…”

Section: Etiology and Epidemiologymentioning

confidence: 99%

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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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“…Economic losses attributable to PTB are a result of premature culling, reduced milk production, and loss of body weight in cattle sold for slaughter (Wells and Wagner, 2000). Dufour et al (2004) classified the losses attributable to PTB into two groups:…”

Section: Various Methods Of Estimation Of Economic Lossesmentioning

confidence: 99%

Economic impact of paratuberculosis in dairy cattle herds: a review

Hasoňová¹,

Pavlík²

2006

Vet. Med.

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Paratuberculosis (PTB) is a disease which causes considerable economic losses to producers of livestock, particularly dairy cows. Nowadays PTB is one of the most prevailing and costly infectious diseases of dairy cattle. The purpose of the present study was to review economic losses, which may be caused by Mycobacterium avium subsp. paratuberculosis (MAP) above all in herds of dairy cattle. The most important losses caused by the presence of clinically ill animals have been thoroughly described: loss of milk production and poor body condition followed by death or culling. In contrast, losses arising from a subclinical disease have not been well documented and contradictory results have been published to date. The calculation of losses caused by PTB depends to a certain degree on the production system in a herd, efficiency level, herd management system and other factors. Direct economic losses are above all caused by decreased milk production concurrent to increased incidence of mastitis, changes in milk parameters and increased somatic cell counts, reproductive dysfunctions, poor feed conversion, shortened production age and increased predisposition to other diseases etc. Indirect economic losses are caused by premature culling of animals and their unrealized future income, expenses for nonactive production, herd replacement, diagnostic testing, "unnecessary" veterinary care and establishing disease control programmes. Genetic value of animals and their progeny is lost. Last but not least, the reputation of the farm where MAP infected animals are kept is lost for a long-time, which is also important.Keywords: Johne's disease; MAP; dairy cattle; economic losses; Crohn's disease; IS900 List of abbreviations: AGIDT = agar gel immunodiffusion test; BVD = bovine viral diarrhoea; CFT = complement fixation test; EBL = enzootic bovine leucosis; ELISA = enzyme-linked immunosorbent assay; GBP = Greit Britain Pound; IBR = infection bovine rhinotracheitis; LA% = lactation percentage; LAM = Lipoarabinomannan; MAP = Mycobacterium avium subsp. paratuberculosis; ME = mature equivalent; NEB = negative energy balance; NOK = Norwegian Crown; PTB = paratuberculosis; SCC = somatic cell count; USD = United States Dollars; USDA = United States

show abstract

Herd-level risk factors for infection with Mycobacterium paratuberculosis in US dairies and association between familiarity of the herd manager with the disease or prior diagnosis of the disease in that herd and use of preventive measures

Cited by 170 publications

References 16 publications

Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd

Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd

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

Economic impact of paratuberculosis in dairy cattle herds: a review

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