ISSN 2398-2993      

Johne's disease

obovis
Contributor(s):

Dick Sibley

James Breen

University of Nottingham logo

Synonym(s): MAP


Johne's disease

Johne's disease is an infectious disease of cattle caused by infection with a bacteria called Mycobacterium Avium subspecies Paratuberculosis (MAP). Because of the long incubation period, most infected animals show clinical signs as adults, with weight loss and scour causing debility and eventually death. The major economic losses are caused by the subclinical effects including poor production, infertility and premature culling.

Severe diarrhoea in a cow with Johne's disease ©Peter Jackson

What causes Johne's disease?

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What is the pathogenesis of the disease?

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What are the clinical effects?

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What about herd infection?

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What is the disease prevalence?

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What biosecurity measures are required?

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How does infection spread?

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What tests can be performed?

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How can it be controlled?

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How can Johne's disease be prevented?

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