Meet Clover, a 3-year-old Dorper ewe on a Virginia farm. Her owner notices she keeps stopping during the morning move to the pasture while the rest of the flock walks on without her. She is not limping. She is not coughing. She just cannot keep up.
The owner assumes she is getting old before her time.
You arrive and listen to her heart. There it is: a loud systolic murmur over the left apex. Her gums are pink but her legs are puffy below the hocks. Jugular veins bulge when she lowers her head.
This is not a respiratory problem. This is her heart failing.
You ask about her recent history. Three months ago she had a dental abscess that was treated but incompletely resolved. That chronic oral infection was likely the source of bacteria that seeded her bloodstream and colonized her mitral valve, creating a growing mass of bacteria and fibrin called a vegetation.
This is bacterial endocarditis caused almost certainly by Trueperella pyogenes, the most common culprit in small ruminants.
Echocardiography confirms it. The prognosis is guarded. Treatment requires weeks of high-dose penicillin.
š” The takeaway: In small ruminants, a chronic infection anywhere in the body is a potential future cardiac emergency.
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