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Pathogen that causes disease in cattle also associated with Crohn's disease
Date:8/7/2008

People with Crohn's disease (CD) are seven-fold more likely to have in their gut tissues the bacterium that causes a digestive-tract disease in cattle called Johne's disease. The role this bacterium may or may not play in causing CD is a top research priority, according to a new report released by the American Academy of Microbiology. The reports points out that the cause of CD is unknown, and the possible role of this bacteriumwhich could conceivably be passed up the food chain to peoplehas received too little attention from the research community.

The report, Mycobacterium avium paratuberculosis: Incidental Human Pathogen or Public Health Threat?, summarizes conclusions and recommendations from a colloquium convened by the American Academy of Microbiology in June 2007 that brought together experts in microbiology, medicine, veterinary pathology, epidemiology, infectious diseases, and food safety. Colloquium participants described the state of knowledge about the relationship between Mycobacterium avium subspecies paratuberculosis (MAP) and CD and developed a research agenda to move the field forward.

Scientists largely agree that multiple factors cause CD, including an environmental stimulus, a genetic propensity, and an overactive inflammatory and immune system triggered by an unknown event. There is mounting evidence that the unknown trigger may be infectious in origin, with several bacteria currently under consideration. "This complicated network of causation has confounded efforts to understand CD, says Carol Nacy, Ph.D., CEO of Sequella, Inc., who chaired the colloquium and is the report's co-author. "MAP may be one of the causes of CD," Nacy adds, "since, among other things, multiple studies identified the pathogen in tissues of CD patients. Treating some of these patients with antibiotics that target Mycobacteria provided relief from symptoms."

Johne's disease is a severe and fatal bacterial infection th
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Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2

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