Eradication of caseous lymphadenitis under extensive management conditions on a Scottish hill farm

Voigt, K.; Baird, Graham; Munro, F.A.; Murray, Fiona; Brülisauer, Franz

doi:10.1016/j.smallrumres.2012.04.014

Cited by 7 publications

(7 citation statements)

References 7 publications

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“…Diagnostic imaging techniques, especially ultrasonography and computed tomography, can be very useful tools to diagnose the visceral form of the disease [39][40][41]. Furthermore, in order to eradicate the disease, ELISA test can be performed, although with a sensitivity of 87% and a specificity of 98% [42], prolonging the testing period, and extending time to eradication can occur, having consequences for the economic value of the flock [43].…”

Section: Discussionmentioning

confidence: 99%

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Ruíz

Ferrer

Ramos

et al. 2020

Animals

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Four hundred and ninety-eight culled sheep received at the Ruminant Clinical Service of the Veterinary Faculty of Zaragoza, Spain, were examined in life and after humanitarian sacrifice in order to reach the final diagnosis of the cause of culling and to evaluate the presence of caseous lymphadenitis (CLA) lesions. One hundred and forty-seven of the 498 studied animals (29.52%) showed CLA compatible lesions that were subsequently confirmed by Corynebacterium pseudotuberculosis isolation. One hundred and seven of the 147 CLA affected animals presenting the visceral clinical form of the disease (72.79%), while only 32 animals were affected by the superficial form (21.77%). In addition, eight animals were found to be affected in both the visceral and the superficial presentations (5.44%). Eighty-four of the 147 CLA-affected animals (57.14%) did not show any concurrent disease, considering, in this case, CLA the main cause of culling (84/498: 16.87%). In the superficial presentation, the retropharyngeal lymph node, as a sole lesion, was the most frequently affected (13/32: 40.63%). Further, in the visceral form of the disease, 85.06% of the affected animals had the lesions located in the respiratory system (91/107: 85.06%). CLA was revealed as an important cause of culling in sheep production.

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Section: Discussionmentioning

confidence: 99%

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Ruíz

Ferrer

Ramos

et al. 2020

Animals

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“…In some countries (UK for example), the vaccine is not available, and control is based on identification and sacrifice of positive animals (Windsor, 2011). Voigt, Baird, Munro, Murray and Brülisauer (2012) succeeded in eradicating CLA from a sheep flock on a Scottish farm through a "test and disposal" program with additional hygiene criteria; lasting approximately 22 months, the individuals were tested three times at monthly intervals with ELISA, with western blot to eliminate false positives. The study confirmed the efficacy of ELISA as a diagnostic tool, as it identifies clinical and subclinical cases.…”

Section: Discussionmentioning

confidence: 99%

Semina: Ciências Agrárias USER You are logged in as... seminagra My Journals My Profile Log Out LANGUAGE Select Language English JOURNAL CONTENT Search Search Scope All Browse By Issue By Author By Title Other Journals FONT SIZE INFORMATION For Readers For Authors For Librarians Journal Help OPEN JOURNAL SYSTEMS HOME ABOUT USER HOME SEARCH CURRENT ARCHIVES AUTHOR GUIDELINE REGISTER INDEXERS JOURNALS PORTAL UEL Home > Vol 41, No 6 (2020) > Barnabé Assessment of caseous lymphadenitis in goats in a s

Barnabé

Alves

Farias

et al. 2020

Semina: Ciênc. Agrár.

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Caseous lymphadenitis (CLA) caused by the pathogenic bacterium, Corynebacterium pseudotuberculosis, results in economic loss in goat farming. Its prevalence in Brazilian herds varies from 5 to 50%, generating expenses with treatment, loss in production, carcass and organ condemnation, and reduced price of the hide. This study aimed to describe the distribution of lesions and quantify the loss associated with CLA in goat breeding due to condemnation in a slaughterhouse located in a semiarid region. The study was conducted at the municipal slaughterhouse of the city of Patos, State of Paraíba, Northeastern Brazil, where goats from this intermediate geographical region are slaughtered. In 2017, 3,662 animals were slaughtered, an average of 305 per month. During the study period, from March to August 2017, 304 goats of both sexes and different ages of undefined breed were assessed. In the ante-mortem examination, inspection and palpation of the superficial lymph nodes was done; in the post-mortem examination, organ and viscera were assessed. The caseous material collected was sent for microbiological analysis. Of the 304 individuals, 227 [74.67% (95% CI: 69.50-79.23)] did not have any lesions, while 77 [25.33% (95% CI: 20.77-30.50)] showed abscesses suggestive of CLA, which was confirmed in 65 goats [84.41% (95% CI: 76.30-92.50)]. Sex (P = 0.044) and age (P = 0.002) were associated with infection. While the sex of the animals affected carcass and viscera weights and carcass yield, their age affected live weight, carcass, organ, and viscera weights; conversely, the incidence of CLA did not affect these variables. The average price in Real (R$) of a kilogram (kg) of goat meat cuts and "offal" was used to calculate the economic loss. Considering the average carcass weight (11,485 kg), organ weight (1,085 kg), and viscera weight (2,013 kg), 4,433.232 kg of meat was produced, resulting in R$ 72,945.43. The condemnations resulted in the loss of 269.894 kg, which is equivalent to R$ 4,540.33. CLA is responsible for a negative impact of 6.09% on production. Implementing control measures for this disease is important to increase the financial return in goat farming.

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“…CLA stimulates both the humoral and cellular immunities and therefore immunoglobulin G or interferon gamma (IFN‐γ) can be measured as indicators of each, respectively. Serology against exotoxin PLD (Elitest CLA; Hyphen Biomed) is the most commonly used test because of its cost efficacy and acceptable test performance (sensitivity 87 per cent, specificity 98 per cent) (Voigt and others 2012). The low sensitivity is likely to be a reflection of the intracellular nature of the bacteria.…”

Section: Diagnosismentioning

confidence: 99%

“…‘Test and cull’ has been used for control in commercial suckler sheep flocks using individual antibody ELISA (Baird and Malone 2010, Voigt and others 2012) and coupled with bulk milk tank serology in goat herds in Norway (Nagel‐Alne and others 2015). This requires repeated serological testing of the adult flock with subsequent removal of any positive animals.…”

Section: Managementmentioning

confidence: 99%

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Update on caseous lymphadenitis in sheep

Gascoigne¹,

Ogden²,

Lovatt³

et al. 2020

In Practice

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Background: Caseous lymphadenitis (CLA), caused by the gram-positive bacteria Corynebacterium pseudotuberculosis, has been present in Great Britain since the 1980s and is now considered endemic. CLA is considered to be an iceberg disease; that is, it is a production-limiting disease, characterised by slow insidious onset, that has production-limiting effects in a larger proportion of the flock than is exhibiting clinical signs at any given point in time.Aim of the article: The disease has been previously reviewed in In Practice (Baird 2003). In this article we consider updates in our understanding of the pathology, risk factors for flocks and the challenges of initiating control where the cost of the disease is still relatively unquantified.

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Eradication of caseous lymphadenitis under extensive management conditions on a Scottish hill farm

Cited by 7 publications

References 7 publications

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

The Relevance of Caseous Lymphadenitis as a Cause of Culling in Adult Sheep

Update on caseous lymphadenitis in sheep

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