The presence of endotoxin was examined in seven sheep with experimentally induced heartwater. Elevations
in endotoxin levels were recorded in one sampling in three of the seven sheep during the acute
stage of the disease. The elevations in endotoxin levels were of short duration and decreased in the
24-h follow-up samples. There was no elevation of leukotrienes (B₄ , C₄ and D₄) in the blood, or the
thoracic or pericardial fluid of any of the sheep.
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