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ARS Home Midwest Area Ames, Iowa National Animal Disease Center Infectious Bacterial Diseases Research Research Publications at this Location





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Title:   Author  item
                                            Whipple, Dianaitem
                                            Palmer, Mitchell
  Submitted to: Wildlife Disease Association Annual Meeting
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 6/4/2000
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Free-ranging, white-tailed deer (Odocoileus virginianus) in northeast Michigan are recognized as a wildlife reservoir of tuberculosis caused by Mycobacterium bovis.  Generally, animals become infected with M. bovis by inhalation of aerosolized organisms or by ingestion of organisms that are present in feed and water.  Mycobacterium bovis has been isolated from  saliva, nasal secretions, and tonsilar swab samples of experimentally infected white-tailed deer.  Therefore, it is possible for infected deer to shed organisms in oral secretions and contaminate feed and water, which would then serve as a source of infection for other animals.  Baiting of deer, which is allowed in Michigan, creates a situation where several deer eat from the same pile of feed and may contribute to transmission of tuberculosis.  The purpose of this study was to determine how long M. bovis survives on various feeds when stored at different temperatures.  The feeds sexamined were alfalfa hay, shelled corn, sugar beets, apples, carrots, and potatoes.  Feeds were held at 75F, 46F, and 0F for 2 hours, 1 day, 2 days, 3 days, 7 days, 2 weeks, 3 weeks, 4 weeks, 8 weeks, 12 weeks, and 16 weeks. Mycobacterium bovis was isolated from all feeds stored at all temperatures for 7 days.  At 46F,  M. bovis survives on all feeds except carrots for at least 12 weeks and, at 0F, it survives on all feeds for at least 16 weeks. Other experiments will be conducted to further examine the role of baiting in transmission of tuberculosis.


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