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HISTORY
JOHNE'S INFORMATION CENTER - University of Wisconsin Ñ School of Veterinary Medicine
University of Wisconsin - School of Veterinary MedicineUniversity of Wisconsin - School of Veterinary Medicine
BIOLOGY
AT A GLANCE



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General

Relationship to other mycobacteria,
taxonomy and nomenclature


Environmental distribution


Host range

Virulence factors

Colonial morphology

Cellular morphology

Cell wall chemistry

Biochemical characteristics

Molecular genetics

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Resistance

Resistance to heat and cold

Resistance to ultraviolet light
(UV) and gamma irradiation


Resistance to chemicals: antibiotics and disinfectants

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Survival

Survival in surface water

Survival in biofilms

Survival in free living amoebae

Survival in feces applied to the soil surface

Survival in feces injected into soils

Survival in slurry pits and anaerobic digesters

Survival in compost





The ecology of M. paratuberculosis, both in the environment and within its host, reflects the basic biology of the organism. A comprehensive understanding of Johne's disease begins with an understanding of the microbe that causes this disease.


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Photo of cow with Johne's disease



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