Document Detail

Lung function and airway cytologic profiles in horses with recurrent airway obstruction maintained in low-dust environments.
MedLine Citation:
PMID:  17939565     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The effects of long-term environmental management on airway obstruction and inflammation in horses with recurrent airway obstruction (RAO) are unknown. HYPOTHESIS: Horses with RAO maintained in low-dust environments have persistent airway obstruction and neutrophilic inflammation. ANIMALS: Study horses were treated for RAO and then maintained in low-dust environments with no medical management. Horses were classified into 3 groups by years after diagnosis: 1 year (time 1, n = 9), 2-3 years (time 2, n = 7), and 5-6 years (time 3, n = 8). The comparison groups were age-matched healthy horses. METHODS: In this cross-sectional study, a clinical examination was performed, and the clinical score was calculated. Standard lung function, forced expiratory maneuvers, and the cytology of bronchoalveolar lavage fluid (BALF) were evaluated. RESULTS: The clinical scores of the RAO horses were higher than those of the non-RAO horses at time 2 (P = .018). Standard lung function data were not different between the groups at any time point. The forced expiratory flow between 75-95% of exhaled vital capacity was lower in RAO horses than in non-RAO horses at all time points (P < .02), indicating persistent peripheral airway obstruction. Cytologic evaluation of BALF revealed no difference in total nucleated cell numbers or differential cell counts between RAO and non-RAO horses at any time point. CONCLUSIONS AND CLINICAL IMPORTANCE: The peripheral airway obstruction detected in horses with RAO maintained in low-dust environments likely is due to irreversible airway remodeling but is not associated with cytologic evidence of airway inflammation.
M Miskovic; L L Couëtil; C A Thompson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of veterinary internal medicine / American College of Veterinary Internal Medicine     Volume:  21     ISSN:  0891-6640     ISO Abbreviation:  J. Vet. Intern. Med.     Publication Date:    2007 Sep-Oct
Date Detail:
Created Date:  2007-10-17     Completed Date:  2007-12-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8708660     Medline TA:  J Vet Intern Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1060-6     Citation Subset:  IM    
Purdue University School of Veterinary Medicine, West Lafayette, IN, USA.
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MeSH Terms
Bronchoalveolar Lavage Fluid / cytology*
Cross-Sectional Studies
Forced Expiratory Volume
Horse Diseases / pathology*,  physiopathology
Pulmonary Disease, Chronic Obstructive / pathology,  physiopathology,  veterinary*
Statistics, Nonparametric
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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