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Immunological reactions caused by infection with Mycobacterium paratuberculosis. A review.

The natural resistance of cattle to infection with Mycobacterium paratuberculsis in relation to their immunological reactions is recorded. In vivo and in vitro manifestations of cell-mediated immunity during infection are reviewed, together with the antibody responses. It is suggested that three distinct immunological states may arise following exposure to infection.

Age Factors↗
PubMed1985

[Zootechnical procedures for the prevention of paratuberculosis on cattle farms. I. Survey].

A questionnaire which can be used in making an inventory of zootechnic procedures to prevent Johne's disease on infected farms was described in the present paper. The most important rule in prevention by zootechnical measures is to keep the animals from coming into oral contact with the faeces. The background to the various problems were discussed in greater detail. This questionnaire will make possible a systematic approach to and the uniform laying down of zootechnical measures to prevent the transmission of Johne's disease, and may serve as a guide to veterinarians in preventive herd health programmes.

Animals↗
PubMed1985

[Zootechnical procedures in the prevention of paratuberculosis on cattle farms. II. Analysis].

The present paper is an analysis of the zootechnical procedures adopted to prevent further distribution of infection on twenty-seven farms on which the animals were affected with Johne's disease. This analysis was based on an extensive questionnaire. Housing was not such on any of these farms that spreading of the faeces among the various age groups was ruled out. The designers failed to take the veterinary aspects into account in construction and arrangement of the shelters. The transmission of Johne's disease was possibly promoted by furnishing the shelters with a scraper system to remove the dung, which system also reached the compartment housing young cattle. Preventive procedures in the field of management were not carried out consistently on any of these farms. This was promoted by inadequate advice to stock farmers. These facts should be taken into account in the control of Johne's disease, as part of the preventive measures cannot be directly influenced by livestock farmers in these conditions.

Animal Husbandry↗