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  • Title: Serological, bacteriological and molecularbiological survey of paratuberculosis (Johne's disease) in Austrian cattle.
    Author: Dreier S, Khol JL, Stein B, Fuchs K, Gütler S, Baumgartner W.
    Journal: J Vet Med B Infect Dis Vet Public Health; 2006 Dec; 53(10):477-81. PubMed ID: 17123426.
    Abstract:
    Paratuberculosis (Johne's disease) is a chronic infectious disease of ruminants, caused by Mycobacterium avium subspecies paratuberculosis (MAP). Because of its long incubation period, high economic losses, difficulties in diagnosis and possible links to Morbus Crohn in humans, paratuberculosis is one of the most important diseases of ruminants today. An abattoir-based nationwide survey on the occurrence of MAP in the Austrian cattle population was performed using serology (SVANOVIR-ELISA) as well as culture, ZN-stain and IS900-PCR on faeces and lymph node samples. A total of 756 Austrian slaughter cattle were serologically, bacteriologically and molecularbiologically tested for the occurrence of MAP and specific antibodies respectively. Samples were collected following a statistical plan to obtain balanced specimens from the whole country. Nineteen per cent of the animals tested were serological positive, 10.1% gave an inconclusive result and 70.9% showed no specific antibodies against MAP. Only in four individuals MAP could be detected by stain, bacteriology or Polymerase Chain Reaction. The calculated prevalence of 19.0% positive cattle, each representing one farm, showing specific antibodies against MAP is rather high in terms of animal-level but low in herd level prevalence compared with other countries. When this study is compared with a similar study performed in Austria 1999, a significant increase of positive cattle and farms could be seen in Austria.
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