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Title:   Author  item
                                            Palmer, Mitchellitem
                                            Whipple, Dianaitem
                                            PAYEUR, JANET - USDA/APHIS/VS/NVSL, AMESitem
                                            Alt, Daviditem
                                            Esch, Kevinitem
                                            BRUNING-FANN, C - USDA/APHIS/VS, MICHIGAN
  Submitted to: Wildlife Disease Association Annual Meeting
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/8/1999
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: In 1997, tuberculosis (TB) was diagnosed in a captive herd of white-tailed deer in NE Michigan. The herd was composed of approx. 350 deer on 1500 acres and was operated as a private hunting establishment. The decision to depopulate the herd was made by the owner, the Michigan Dept. of Agriculture, and the USDA. During the depopulation effort, postmortem exams swere done on 116 deer. Various tissues, feces, and swabs of the nasal, oral, and tonsilar crypt regions were collected for bacteriologic culture from all 116 deer. Tissues were collected for microscopic examination from deer with gross lesions suggestive of TB. Tuberculous lesions were seen in 9 of 116 deer. M. bovis was isolated from 1 deer that had no gross lesions of TB. The most common sites to contain gross lesions were the medial retropharyngeal LNs (6 of 9), and the lung (4 of 9). Three of ten tuberculous deer would have been missed had the examination been limited to othe head and associated cranial LNs. Swabs of the tonsilar crypt from 1 of 116 deer contained M. bovis. All other swabs and fecal samples were negative for the presence of M. bovis. Pelleted feed, corn, hay, and soil were collected for bacteriologic culture from feeding sites on the 1500-acre premise. Water was collected for bacteriologic culture from ponds used as watering sites. M. bovis was not isolated from any feed, hay, soil, or water samples. Some surveys for tuberculosis in white-tailed deer involve examination of the head and cranial LNs only. These results suggest that examination of the head alone, will underestimate the prevalence of disease in a naturally infected population. These results further suggest that environmental survival of M. bovis in feed, soil, or water may not play an important role in the transmission of the disease.


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