Pneumonia, lung abscesses and pleuritis in adult horses: a review of 51 cases.

The study reviews the records of 51 adult horses diagnosed with pneumonia, lung abscesses, or pleuritis, offering insight into the primary and secondary causes and associations with these conditions, particularly in relation to stress and certain uses of the horses.

Detailed Analysis of the Cases

• The study has examined the medical records of 51 adult horses and made some significant findings. From this group, 45 horses were found to be suffering from pneumonia and/or pulmonary abscesses. The sickness in 11 of these horses was a primary infection, meaning it was not caused by any prior ailment. The majority, 34 horses, developed pneumonia or abscesses as a secondary condition, attributed to factors such as inhalation of food or saliva, thoracic trauma, widespread infections, airway diseases, cancer or thromboembolism, a condition involving blood clots in the lung vessels.
• Furthermore, the research observed a tangible connection between primary lung infections and a prior episode of stress in the horses. In eight out of ten such cases, long-distance travel was the stressor.
• The research also found a significant correlation between horses used for specific activities, such as showjumping, and the prevalence of primary pneumonia or lung abscesses implying that these sports horses might be subjected to conditions or lifestyle factors contributing to the likelihood of these ailments.

Findings on Pleuritis Cases

• Pleuritis, a condition characterized by the inflammation of the pleura, the two thin layers of tissue that separate the lungs from the chest wall, was found in 18 horses. The cause in 12 of these horses was secondary due to pneumonia or lung abscesses.
• In two cases, the pleuritis resulted from thoracic trauma, and in one case from generalized avian tuberculosis. The analysis also identified three cases of primary pleuritis, with no further ailment contributing to this condition.

Significance of the Research

• This analysis provides crucial insights into the nature, cause, and contributing factors to serious respiratory diseases in horses. Such findings can guide veterinarians in formulating targeted treatment regimes, influencing preventive measures, and enhancing the overall understanding of equine respiratory health.
• The discernible connection between certain uses of horses, such as showjumping and the prevalence of primary lung conditions, may stimulate further investigation and reforms in the management and care of sport horses.
• Similarly, acknowledging stress-related factors contributing to primary lung infections can help manage the health of horses exposed to stress-inducing situations, like long-distance travel.