Herd-level economic losses associated with Johne's disease on US dairy operations

Ott, Stephen L.; Wells, Scott J.; Wagner, Bruce A.

doi:10.1016/s0167-5877(99)00037-9

Cited by 526 publications

(395 citation statements)

References 6 publications

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“…Epidemiological studies suggest that the odds of seropositivity increase with herd size [10,15]. Nevertheless, it is not possible according to the published data to investigate whether this observation is linked to a greater risk to introduce an infected animal when the herd is large, or if it is linked to a different within herd disease behaviour, or both.…”

Section: Discussionmentioning

confidence: 99%

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A deterministic and stochastic simulation model for intra-herd paratuberculosis transmission

Pouillot¹,

Dufour²,

Durand³

2004

Vet. Res.

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-In France, the considerable economic losses due to paratuberculosis introduction in cattle herds may justify the development of a herd-level certification procedure. For a cost/benefit analysis purpose, a simple deterministic and stochastic simulation model for intra-herd paratuberculosis transmission has been developed to evaluate the economic consequences of the purchase of a single infected heifer in a French average herd. The values of the epidemiological parameters were provided by a panel of French paratuberculosis experts. The results were in adequacy with field observations. A sensitivity analysis was conducted. The model was however difficult to validate rigorously, since few data on the intra-herd paratuberculosis true prevalence level are currently available. paratuberculosis / stochastic model / deterministic model / sensitivity analysis

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Section: Discussionmentioning

confidence: 99%

“…This infection is of great economic importance for producers. Averaged across all herds, the cost of Johne's disease in the US dairy industry was estimated at US$ 200 to US$ 250 million per year [15].…”

Section: Introductionmentioning

confidence: 99%

A deterministic and stochastic simulation model for intra-herd paratuberculosis transmission

Pouillot¹,

Dufour²,

Durand³

2004

Vet. Res.

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“…According to the authors, this decrease is estimated in the literature at 5% to 25% of the yearly production [1,6,9,10]. The upper estimation was kept and the yearly cost of a sub-clinically infected animal in a dairy herd was computed as the corresponding amount of production lost by the price of a liter of milk.…”

Section: Estimation Of the Disease Costsmentioning

confidence: 99%

“…paratuberculosis infection, that may cause considerable production losses in cattle, sheep and goat herds [2]: in the United States, the direct costs induced yearly by this disease have been estimated in the dairy industry at US$ 200 to US$ 250 millions [10].…”

Section: Introductionmentioning

confidence: 99%

A cost/benefit study of paratuberculosis certification in French cattle herds

Dufour¹,

Pouillot²,

Durand

2004

Vet. Res.

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-Paratuberculosis has received increasing attention in France because of the important losses this disease may provoke. The use of certification schemes has proven its effectiveness for the protection of healthy herds against diseases transmitted mainly by trade. The economic justification of such schemes in the particular case of paratuberculosis is studied, for French cattle herds, using a cost/benefit approach. The basic economical hypotheses and estimates have been proposed and carefully examined by a working group composed of paratuberculosis experts and field specialists. By adopting the point of view of a breeder that buys animals, we first estimated the benefits resulting from the non-introduction of the disease. They were then compared with the costs resulting from the fact that the vendor reports its own certification costs on the price of the animals he sells. Two average herds (the mean French beef herd and the mean French dairy herd), and two certification levels were studied. The results show that, currently, the use of the certification is not very economically profitable in French cattle herds. This conclusion, however should be reappraised if the certification costs decrease, for example with the commercialization of diagnostic tests on mixtures. paratuberculosis / cost-benefit analysis / certification

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“…paratuberculosis (MAP), causes considerable economic losses to the livestock industries. Losses to the American dairy industry alone were estimated to be US$ 200 to 250 million annually (Ott et al, 1999). Similarly in Australia, paratuberculosis caused an average reduction of income of AU$ 13,715 per farm per year on 12 infected Merino sheep flocks (Bush et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Association of farm soil characteristics with ovine Johne's disease in Australia

Dhand

Eppleston

Whittington

et al. 2009

Preventive Veterinary Medicine

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Speculation about the association of soil characteristics with the expression of ovine Johne's disease (OJD) prompted this cross-sectional study. We enrolled 92 sheep flocks in Australia during 2004-05 and in each enrolled flock collected pooled faecal samples from an identified cohort (group of same age and sex) of sheep and soil samples from the paddocks grazed by this cohort of sheep. Faecal pools were cultured to create three outcome variables: positive or negative status of faecal pools (pool OJD status, binary); the log number of viable Mycobacterium avium subsp. paratuberculosis (MAP) organisms per gram of faeces (log pool MAP number, continuous); and the prevalence of faecal shedders (cohort OJD prevalence level, ordinal: low <2%, medium 2-10% and high >10%). Separate statistical models were then developed to investigate the association between soil characteristics and each outcome variable.Sheep raised on soils with a higher percentage of organic carbon and clay had a higher OJD prevalence whereas, sheep grazing on soils with a higher content of sand and nitrogen had a lower OJD prevalence. Iron content of the soil was positively associated with OJD infection but the association between soil pH and OJD was inconclusive. Parent soil type, the only farm level factor, was not significant in any of the final models.Study results indicate a higher risk of OJD in sheep raised on soils with greater organic matter and clay content. We hypothesise that this is due to adsorption of MAP to clay and the 2 consequent retention of the bacteria in the topsoil, thus making them available in higher numbers to grazing sheep.

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Herd-level economic losses associated with Johne's disease on US dairy operations

Cited by 526 publications

References 6 publications

A deterministic and stochastic simulation model for intra-herd paratuberculosis transmission

A deterministic and stochastic simulation model for intra-herd paratuberculosis transmission

A cost/benefit study of paratuberculosis certification in French cattle herds

Association of farm soil characteristics with ovine Johne's disease in Australia

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