At the height of summer, a 2 month old foal comes to your clinic. It is pyrexic, depressed, dyspnoic and tachypnoeic. It has a productive cough and has been having diarrhea. Other foals are showing similar signs. You performed a thoracic radiograph, which is shown above. Unfortunately, the foal ends up passing away. On post-mortem you find widespread abscess formation throughout its lungs. The foal likely has
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