On-farm management systems to control Johne's Disease
Abstract
Johne's Disease is an infectious bacterial disease that primarily affects the intestinal tract of
bovine and other ruminant animals.
It is caused by a mycobacterium named Mycobacterium avium subspecies paratuberculosis.
The microbe is only able to multiply inside an animal's intestinal tract. However, the
development of clinical disease does not occur instantly and, in some instances, the
organism is known to survive for more than a year in the intestinal tract. The microbe is
also resistant to heat, cold and drying and can survive for considerable periods in the
envi ronment .
The main source of infection is directly from infected animals. Johne's Disease is as much a
herd problem in New Zealand as it is a problem for individual animals.
There are some recent, but unconfirmed, reports of culturing the microbe, or detecting its
genetic components in humans with Crohns disease.
Johne's Disease is an animal health problem which affects ruminant animals the world over.
It therefore has implications for trade of dairy products as consumers become concerned and
informed of animal health issues. It is therefore desirable that livestock industries take a
proactive stance in increasing industry awareness and management measures to control the
disease. This report gathers available research statistics and findings on the identification and treatment of
Johne's Disease (JD) in the New Zealand dairy cow population and makes recommendations on its control through a variety of management systems.... [Show full abstract]
Fields of Research
070205 Animal Protection (Pests and Pathogens); 070107 Farming Systems ResearchDate
2001-11Type
MonographAccess Rights
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