Equine Recurrent Airway Obstruction

Niedźwiedź, Artur

doi:10.14432/j.macvetrev.2014.08.019

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…Each horse received a physical exam, clinical score ( Table 1 ) and BAL. The clinical score rubric was similar to those previously described, with slight modifications ( 15 , 16 ).…”

Section: Methodsmentioning

confidence: 99%

Bronchoalveolar Lavage Cytology Characteristics and Seasonal Changes in a Herd of Pastured Teaching Horses

Davis

Sheats

2019

Front. Vet. Sci.

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Equine asthma syndrome (EAS) is a common problem that affects horses of any age. Severe EAS is reported to affect 10–20% of adult horses in the northern hemisphere, while mild/moderate EAS is reported to affect 60–100% of adult horses, depending on the population and geographic region. For both severe and mild/moderate EAS, the presence of lower airway inflammation is attributed to airborne “triggers” such as dust, mold, and bacterial components that horses encounter in hay and stable-environments; and treatment recommendations for horses with EAS often include full-time pasture turnout. The caveat to this recommendation is horses with summer-pasture associated EAS (SP-EAS), who experience allergic lower airway inflammation when exposed to summer pasture. The prevalence of EAS in horses on pasture that do not have SP-EAS has not been reported. The purpose of this study was to use bronchoalveolar lavage (BAL) cytology to determine the prevalence of EAS in a herd of pastured, adult research horses with no history of respiratory disease. The horses were members of a teaching animal herd housed on pasture in the southeastern United States and fed round-bale Bermuda-grass hay. BAL fluid (BALF) cytology was analyzed in both summer (May–August 2017) and winter (November 2017–February 2018). Similar to previous reports, the prevalence of severe EAS in our study population was 10% in summer and 4.3% in winter. The prevalence of mild/moderate EAS was 60% in summer and 87% in winter. The high prevalence of mild/moderate EAS in this population was unexpected, given the 24-h, year-round pasture environment and the lack of history of respiratory disease. Additionally, 61.1% of horses with both summer and winter data had a different BALF cytology profile between the two seasons. To the authors' knowledge, this is the first study to use BAL cytology to diagnose, and monitor changes in, EAS phenotype in pastured adult horses. These results help to inform discussions regarding prevalence of EAS in pastured, adult horses in the southeastern region of North America.

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“…Each horse received a physical exam, clinical score ( Table 1 ) and BAL. The clinical score rubric was similar to those previously described, with slight modifications ( 15 , 16 ).…”

Section: Methodsmentioning

confidence: 99%

Bronchoalveolar Lavage Cytology Characteristics and Seasonal Changes in a Herd of Pastured Teaching Horses

Davis

Sheats

2019

Front. Vet. Sci.

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“…However, there are no significant trends, in terms of genetic factors, which could cause the number of asthma-affected horses to increase dramatically from year to year, although the odds ratio analysis indicated some significant effects in terms of higher asthma risk for horses born in the period 2000–2009 ( Table 6 ). Previous studies have considered only the age of the animal and its predisposition to equine asthma [ 9 , 58 ]. An increasing number of morbidity cases has been observed in humans suffering from other disorders associated with allergic diseases [ 59 ].…”

Section: Resultsmentioning

confidence: 99%

“…Respiratory system diseases in horses are a considerable problem for both breeders and riders. After disorders of the musculoskeletal system, they are the second most important group of ailments that cause problems with physical effort, leading to exclusion from breeding and sports [ 9 , 10 ]. In young animals, the predominant syndromes include diseases of the upper respiratory tract and lung afflictions caused by infectious agents.…”

Section: Introductionmentioning

confidence: 99%

Some Genetic and Environmental Effects on Equine Asthma in Polish Konik Horses

Borowska

Wolska

Niedźwiedź

et al. 2021

Animals

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Current knowledge of the genetic and environmental backgrounds of equine asthma seems to be insufficient, especially for primitive horse breeds. The main objectives of this study were to estimate the effects of sex, birth period, stud, parentage line and inbreeding on asthma morbidity in Polish Konik horses. Records of 274 horses (housed in two studs) were analysed. These animals were allocated to maternal and paternal lines. Individual inbreeding coefficients were extracted from the additive relationship matrix. Horses underwent diagnosis based on observation of the basic symptoms (high frequency of coughing and excessive nasal discharge). Subsequently, some horses (28 individuals) were clinically examined to confirm the earlier observations. Generally, no significant effects of parentage line on heaves morbidity were identified by the use of logistic regression, although the Pearson’s chi-squared test had shown that individuals of some maternal and paternal lines had a predisposition to severe equine asthma. It was concluded that the individual inbreeding level is not associated with the incidence of EA, but a significant effect of the maternal inbreeding coefficient may be observed. It was also found that there is some variability in the incidence of this disease between studs.

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Equine Lower Respiratory System

Nykamp¹

2018

Textbook of Veterinary Diagnostic Radiology

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Equine Recurrent Airway Obstruction

Cited by 5 publications

References 30 publications

Bronchoalveolar Lavage Cytology Characteristics and Seasonal Changes in a Herd of Pastured Teaching Horses

Bronchoalveolar Lavage Cytology Characteristics and Seasonal Changes in a Herd of Pastured Teaching Horses

Some Genetic and Environmental Effects on Equine Asthma in Polish Konik Horses

Equine Lower Respiratory System

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