The Comparison of Airway Responses of Normal Horses Fed Round Bale versus Square Bale Hay
Larson, Jennifer Lynn
MetadataShow full item record
Background â Feeding horses round bale hay (RBH) has been associated with airway inflammation. The purpose of this study was to determine if horses fed RBH for a 6-week period demonstrated more evidence of airway inflammation than horses fed square bale hay (SBH) of comparable quality. Hypothesis - The respiratory health of horses fed RBH will not differ from horses fed SBH of comparable quality. Animals â Two feeding groups of 15 healthy horses (mixed ages, breeds) from the University riding program. Methods â This was a prospective study performed during fall of 2009. At the beginning and end of a 6-week feeding trial, horses were examined (physical, upper airway endoscopic) and samples (tracheal aspirate (TA), bronchoalveolar lavage (BAL)) collected for cytology and/or bacterial/fungal culture. Hay was analyzed for nutritional value and bacterial/fungal content. Results â Horses fed RBH demonstrated an increase in pharyngeal lymphoid hyperplasia (p=0.0143) and percentage neutrophils (p=0.0078) in the TA samples post-feeding as compared to pre-feeding values. Nutritional analysis of hay and measurements of bacterial/fungal load did not differ over time and/or between hay types. Conclusions and clinical importance â The identification of airway inflammation in the horses fed RBH indicates that factors associated with the manner in which the hay is fed and consumed contribute to the development of subclinical airway inflammation. RBH affords horses continuous daily exposure to hay and as horses bury their muzzles in the bale, exposure to particulate matter is likely increased. These factors may partially explain the response in horses fed RBH. Further studies are required to confirm these predictions
- Masters Theses 
Showing items related by title, author, creator and subject.
Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay Blumerich, Celeste Ann (Virginia Tech, 2012-06-21)Recurrent Airway Obstruction (RAO)-affected horses experience bronchoconstriction and airway inflammation in response to inhalation of irritants including hay molds. Steaming hay reduces fungal content, but the effect on ...
Relationship between surfactant alterations and severity of disease in horses with recurrent airway obstruction (RAO). Christmann, Undine (Virginia Tech, 2008-08-28)Pulmonary surfactant is synthesized in the alveoli and lines the respiratory epithelium of the airways. Phospholipids, the main component of surfactant, confer it its ability to lower surface tension and to prevent alveolar ...
Sandhu, Amarinder; Rubio, Edmundo; Ie, Susanti; Boyd, Michael (Hindawi, 2012-01-01)Endobronchial ultrasound-guided transbronchial needle aspiration is becoming the standard of care for mediastinal sampling to diagnose and stage lung cancer. It is considered to be safe and rivals the gold standard, ...