Search Results
You are looking at 1 - 9 of 9 items for
- Author or Editor: Susan Williams x
- Refine by Access: All Content x
Abstract
Objective—To test the hypothesis that feedlot cattle with acute interstitial pneumonia (AIP) have bacterial infection of the lung or liver and concurrent bovine respiratory syncytial virus (BRSV) infection significantly more often than pen mates without AIP.
Animals—39 feedlot cattle with signs consistent with AIP and no history of treatment with antimicrobials and 32 healthy control cattle from the same pens.
Procedure—Lung and liver specimens were obtained postmortem for bacterial or mycoplasmal culture and histologic examination; lung tissue was assessed for BRSV infection immunohistochemically.
Results—Among affected cattle, 26 had AIP confirmed histologically. Lung tissue from 11 cattle with AIP yielded microbial respiratory tract pathogens on culture; tissues from control animals yielded no microbial growth. In 4 cattle with AIP and 2 control animals, liver abscesses were detected; bacteria were isolated from abscessed tissue in 3 and 1 of those animals, respectively. Immunohistochemically, 9 cattle with AIP and no control animals were BRSV-positive. Histologically, 9 AIP-affected cattle had only acute alveolar damage with exudation, and the other 17 had acute exudation with type II pneumocyte hyperplasia. No lesions of AIP were detected in control animals. Only 4 AIP-affected cattle had bacterial infection of the lung with concurrent BRSV infection.
Conclusions and Clinical Relevance—Results indicated that microbial respiratory tract pathogens are more common in cattle with AIP than in healthy pen mates. Control of bacterial pneumonia late in the feeding period may reduce the incidence of AIP at feedlots where AIP is a problem. (Am J Vet Res 2004;65:1525–1532)
Abstract
Objective—To characterize the signalment, clinical signs, biological behavior, and response to treatment of carcinoma of the apocrine glands of the anal sac in dogs.
Design—Retrospective study.
Animals—113 dogs with histologically confirmed carcinoma of the apocrine glands of the anal sac.
Procedure—Data on signalment, clinical signs, and staging were reviewed and analyzed along with treatment modality for potential association with survival time.
Results—Sex distribution was approximately equal (54% female, 46% male). One hundred four dogs underwent treatment consisting of surgery, radiation therapy, chemotherapy, or multimodal treatment. Median survival for treated dogs was 544 days (range, 0 to 1,873 days). Dogs treated with chemotherapy alone had significantly shorter survival (median, 212 days) than those receiving other treatments (median, 584 days). Dogs not treated with surgery had significantly shorter survival (median, 402 days) than those that underwent surgery as part of their treatment (median, 548 days). Dogs with tumors ≥ 10 cm2 had significantly shorter survival (median, 292 days) than dogs with tumors ≥ 10 cm2 (median, 584 days). Hypercalcemia was identified in 27% (n = 29) of dogs, and those dogs had significantly shorter survival (median, 256 days), compared with those that were normocalcemic (median, 584 days). Dogs with pulmonary metastasis had significantly shorter survival (median, 219 days) than dogs without evidence of pulmonary metastasis (median, 548 days).
Conclusions and Clinical Relevance—Unlike most previous reports, this study revealed an approximately equal sex distribution, and results suggest a more favorable prognosis. (J Am Vet Med Assoc 2003;223: 825–831)
Abstract
In collaboration with the American College of Veterinary Pathologists
Objective
To assess veterinary students' perceptions regarding the importance of addressing the human-animal bond in veterinary practice and their perceptions about the adequacy of curricula on the human-animal bond as presented in US veterinary colleges.
Design
Survey.
Procedure
Data were collected via a brief questionnaire mailed during the summer of 1996. Questionnaires were returned by 552 senior veterinary students representing 21 of 27 veterinary colleges in the United States.
Results
Senior veterinary students believed that the human-animal bond should be a concern of practicing veterinarians, but most did not believe they were receiving adequate instruction about the human-animal bond in their veterinary colleges. Gender was significantly related to differences in perceptions; female students appeared to have more interest in addressing the human-animal bond than male students. Students in small animal programs viewed the human-animal bond differently than those in large animal programs. Finally, students attending schools with extensive human-animal bond or human relations curricula were more likely to believe they were receiving adequate instruction in this area than students in other schools.
Conclusions and Clinical Implications
Curricula addressing the human-animal bond need to be developed and implemented in veterinary colleges in the United States. (J Am Vet Med Assoc 1999;215:1428–1432)